JP2009171324A - Imaging device - Google Patents

Abstract

An inexpensive imaging apparatus capable of correcting camera shake with high accuracy is provided.
When it is determined in step S403 that the subject distance is slower than a predetermined value and in step S404 it is determined that the subject distance is 1 m or less, the process proceeds to step S412 to add images by superimposing a plurality of images. The number of continuous shots is calculated to prepare for taking a photographed image. In step S412 to step S414, continuous shooting is performed, and in step S415, a plurality of captured images are overlaid, and when the subject distance is a predetermined short distance, the correction of camera shake that is strongly affected by parallel blurring is performed with high accuracy. Do. When the subject distance exceeds 1 m, the camera shake is optically corrected with high accuracy by moving the image sensor in step S407.
[Selection] Figure 4

Description

  The present invention relates to a photographing apparatus that includes an image sensor and generates an image signal by forming a subject image on the image sensor.

  Many recent digital cameras are equipped with an image stabilization function. In the configuration that realizes this camera shake correction function, camera shake is corrected by superimposing multiple images that are continuously shot with the optical one that corrects camera shake by moving the lens and image sensor so that they are positioned mutually. Some of them are electronic. Recently, an image sensor capable of reading at a high frame rate has been developed. Some digital cameras have an electronic image stabilization function instead of an optical image stabilization function. Yes (see, for example, Patent Document 1).

  However, in this Patent Document 1, since a motion vector is detected from a plurality of continuous images and camera shake correction is performed based on the motion vector, a signal called a process of detecting a motion vector and a process of superimposing the images There is a problem that it takes time to execute the process.

  Therefore, in order to shorten the processing time of the signal processing, the processing for detecting the motion vector is abolished and the gyro sensor is mounted, and the electronic image stabilization function and the optical type are based on the angular velocity detected by the gyro sensor. There has been proposed a technique for properly using the image stabilization function (see Patent Document 2).

  However, when the subject distance is a predetermined short distance, the influence of the shake in the parallel direction (hereinafter referred to as parallel shake) appears more strongly than the shake in the rotation direction (hereinafter referred to as rotation shake).

  FIG. 14 is a diagram for explaining parallel shake and rotational shake.

  In FIG. 14, rotational shake is shown around each of the X, Y, and Z axes, and parallel shake is shown by arrows that cross each axis.

  When the subject distance is a predetermined short distance and the camera shake is detected by the gyro sensor, the rotational shake shown in FIG. 14 is detected, and thus the camera shake that is largely affected by the parallel shake is not accurately corrected. Will occur. In order to correct the camera shake when the subject distance is a predetermined short distance, it is necessary to mount an acceleration sensor and detect the acceleration representing the parallel shake with the acceleration sensor. Patent Document 3 proposes a technique in which the acceleration sensor is mounted in addition to the gyro sensor, and the camera shake is corrected according to the detection results of both the gyro sensor and the acceleration sensor. When an acceleration sensor and a gyro sensor are mounted as in Patent Document 3, camera shake correction performance in short-distance shooting when a subject is at a predetermined short distance is dramatically improved.

  However, the acceleration sensor is very expensive and has a problem of increasing the cost of the photographing apparatus.

In addition, many photographing apparatuses are equipped with a zoom switch, and when this zoom switch is operated to increase the photographing magnification, the effect of parallel blur tends to appear more strongly when the subject distance is a predetermined short distance. There is. In addition, when the photographer is a beginner or when the photographing apparatus cannot properly hold the photographing apparatus, the influence of parallel blur when the subject distance is a predetermined short distance may appear more strongly. In order to detect these parallel shakes, an expensive acceleration sensor is inevitably required.
JP 11-252445 A JP-A-5-14801 Japanese Patent Laid-Open No. 10-301157

  An object of the present invention is to solve the above-described drawbacks and to provide an inexpensive photographing apparatus in which camera shake is accurately corrected.

A first imaging device of the present invention that achieves the above object is an imaging device that generates an image by forming an image of a subject on an imaging device with a shooting optical system.
Motion detection means for obtaining a vector representing the motion of a subject on an image obtained by the imaging device;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
Based on the motion vector detected by the motion detection means, an optical camera shake correction means for correcting camera shake by moving at least a part of the optical member composed of the imaging optical system and the imaging element;
When the distance calculating means calculates that the distance is a predetermined short distance and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed, a single shooting instruction is received. And generating a plurality of images, causing the motion detection means to detect a motion vector, and superimposing the plurality of images based on the motion vector so that subject blur on the image is corrected Means.

  According to the photographing apparatus of the present invention, the distance calculating unit calculates that the subject distance is a predetermined short distance, and the shutter speed set by the shutter speed setting unit is lower than the predetermined shutter speed. In this case, the image superimposing means corrects the camera shake in which the influence of the parallel shake appears strongly based on the motion vector detected by the motion vector detecting means.

  As is well known, camera shake occurs when the shutter speed is low, and hardly occurs when the shutter speed is, for example, a shutter speed that is referred to as a camera shake limit, for example, 1/60 or more. If the shutter speed is 1/60 or more, even if camera shake occurs when the subject distance is at a predetermined short distance, it can be sufficiently corrected by the optical camera shake correction means. Electronic camera shake correction means when the distance calculation means calculates that the subject distance is a predetermined short distance and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed. The above-described superimposing means equivalent to the above-mentioned overlapping corrects the camera shake in which the influence of the parallel shake appears strongly.

  With the above configuration, when the distance calculating means calculates that the distance is a predetermined short distance, and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed, it is parallel. If the blur appears strongly, the effect of correcting the blur with high accuracy is obtained by the superimposing means. Except for this case, the optical camera shake correcting means corrects the camera shake and reduces the load on the superimposing means. The effect is obtained.

  Here, since the gyro sensor is considerably cheaper than the acceleration sensor, the inexpensive gyro sensor may be used in place of the motion detection means when performing the optical camera shake correction.

The second imaging device of the present invention that achieves the above object provides:
In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the imaging device;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging element based on the angular velocity detected by the gyro sensor; ,
When the distance calculating means calculates that the distance is a predetermined short distance and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed, a single shooting instruction is received. To generate a plurality of images, let the motion detection means detect a motion vector, and based on the motion vector, superimpose the plurality of images so that subject blur on the image is corrected Means.

  In the second photographing apparatus of the present invention, the same effect as that of the first photographing apparatus of the present invention can be obtained by providing the gyro sensor instead of the motion detection means provided in the first photographing apparatus of the present invention. When this gyro sensor is used, it is possible to detect a blurring state with higher accuracy than when the motion detection means detects the motion vector. Therefore, when the subject distance exceeds a predetermined distance, or the shutter speed is a predetermined speed. The camera shake is corrected more accurately when the speed is lower than the speed.

  When the gyro sensor is provided, the images may be superimposed based on the angular velocity detected by the gyro sensor when the images are superimposed, and the motion vector detecting means can be omitted. .

A third imaging device of the present invention that achieves the above object is an imaging device that generates an image by forming an image of an object on an imaging device with an imaging optical system.
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
When the distance calculating means calculates that the distance is a predetermined short distance and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed, a single shooting instruction is received. A plurality of images are generated, and the plurality of images are overlaid on the basis of the angular velocity detected by the gyro sensor during the generation of the plurality of images so that subject blur on the image is corrected. And an image superimposing means to be combined.

  As in the third image taking apparatus, the optical camera shake correcting unit performs optical camera shake correction based on the angular velocity detected by the gyro sensor with the motion detecting unit omitted, and the image superimposing unit sets the image. It is also possible to adopt a configuration in which

A fourth imaging device that achieves the above object is an imaging device that generates an image by forming an image of a subject on an imaging element with a shooting optical system.
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the imaging device;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
A shooting magnification setting means for setting a shooting magnification;
Based on the motion vector detected by the motion detection means, an optical camera shake correction means for correcting camera shake by moving at least a part of the optical member composed of the imaging optical system and the imaging element;
It is calculated that the predetermined distance is calculated by the distance calculating means, and the photographing magnification set by the photographing magnification setting means is larger than the predetermined magnification, and is further set by the shutter speed setting means. When the shutter speed is lower than the predetermined shutter speed, a plurality of images are generated in response to a single shooting instruction, the motion detection means detects the motion vector, and the motion vector is On the basis of this, image superimposing means for superimposing the plurality of images so that subject blur on the image is corrected is provided.

  According to the fourth photographing apparatus of the present invention, the distance calculating unit calculates that the subject distance is a predetermined short distance, and the photographing magnification set by the photographing magnification setting unit is larger than the predetermined magnification. Further, when the shutter speed set by the shutter speed setting means is a shutter speed slower than a predetermined shutter speed, the motion detected by the motion vector detecting means by the image superimposing means. Based on the vector, the camera shake in which the influence of the parallel shake appears strongly is corrected.

  As described above, when the shooting magnification is increased, the effect of parallel blurring appears more strongly when the subject distance is a predetermined short distance. When the shooting magnification is decreased, camera shake occurs when the subject distance is a predetermined short distance. Even if it occurs, the influence of the parallel shake is reduced, and it is possible to correct it by the optical camera shake correction means. Therefore, as described above, the distance calculation unit calculates that the subject distance is a predetermined short distance, and the shooting magnification set by the shooting magnification setting unit is a shooting magnification larger than a predetermined magnification. When the shutter speed set by the shutter speed setting means is a shutter speed slower than a predetermined shutter speed, the above-described superimposing means corresponding to the electronic camera shake correcting means corrects the camera shake in which the influence of parallel shake appears strongly.

  With the above configuration, the distance calculation unit calculates that the subject distance is a predetermined short distance, and the shooting magnification set by the shooting magnification setting unit is a shooting magnification larger than a predetermined magnification, and When the shutter speed set by the shutter speed setting means is a shutter speed slower than a predetermined shutter speed, the effect that the camera shake is accurately corrected by the superimposing means is obtained, assuming that parallel shake appears strongly, Further, except for this case, an effect is obtained in which the camera shake is corrected by the optical camera shake correction unit and the load on the overlaying unit is reduced.

  Here, in the fourth photographing apparatus of the present invention, the configuration in which the optical camera shake correction is performed based on the motion vector detected by the motion vector detecting unit has been described. However, instead of the motion vector detecting unit, a gyro sensor is used. It may be used.

A fifth photographing apparatus of the present invention that achieves the above object is a photographing apparatus for generating an image by forming an image of a subject on an image pickup element with a photographing optical system.
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the imaging device;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
A shooting magnification setting means for setting a shooting magnification;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging element based on the angular velocity detected by the gyro sensor; ,
It is calculated that the predetermined distance is calculated by the distance calculating means, and the photographing magnification set by the photographing magnification setting means is larger than the predetermined magnification, and is further set by the shutter speed setting means. When the shutter speed is lower than the predetermined shutter speed, a plurality of images are generated in response to a single shooting instruction, the motion detection means detects the motion vector, and the motion vector is On the basis of this, an image superimposing unit that superimposes the plurality of images so that subject blur on the image is corrected is provided.

  In the fifth photographing apparatus of the present invention, the gyro sensor is provided in the optical camera shake correction means provided in the fourth photographing apparatus of the present invention. When this gyro sensor is used, it is possible to detect the angular velocity of the shake state with higher accuracy than when the motion detection means detects the motion vector, so that it is possible to correct the shake with higher accuracy. .

  When the gyro sensor is provided, the image superimposing means may superimpose images based on the angular velocity detected by the gyro sensor when superimposing the images, and then the motion vector detecting means Can be omitted.

According to a sixth imaging device of the present invention that achieves the above object, in the imaging device for generating an image by forming an image of a subject on an image sensor with a photographing optical system,
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
A shooting magnification setting means for setting a shooting magnification;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
The distance calculating means calculates that the distance is a predetermined short distance, and the shooting magnification set by the shooting magnification setting means is larger than a predetermined magnification, and is further set by the shutter speed setting means. When the shutter speed is lower than the predetermined shutter speed, a plurality of images are generated in response to one shooting instruction, and the gyro sensor detects the plurality of images during the generation. An image superimposing unit that superimposes the plurality of images so as to correct subject blur on the image based on the angular velocity is provided.

  As in the sixth imaging apparatus, the optical camera shake correcting means performs optical camera shake correction based on the angular velocity detected by the gyro sensor without the motion detecting means, and the image superimposing means is used for the image superimposing means. You may make it the structure which superimposes.

In addition, a seventh imaging device of the present invention that achieves the above object is an imaging device that generates an image by forming an image of a subject on an imaging element with an imaging optical system.
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the imaging device;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
Based on the motion vector detected by the motion detection means, an optical camera shake correction means for correcting camera shake by moving at least a part of the optical member composed of the imaging optical system and the imaging element;
The amount of motion per exposure time corresponding to the shutter speed set by the shutter speed setting means, based on the motion vector calculated by the distance calculation means to be a predetermined short distance and detected by the motion detection means Is a motion amount greater than or equal to the threshold value, a single shooting instruction is received to generate a plurality of images, the motion detection means detects the motion vector, and based on the motion vector, the plurality of images And an image superimposing unit that superimposes the image so that subject blur on the image is corrected.

  According to the seventh photographing apparatus of the present invention, the distance calculating unit calculates the predetermined short distance and sets the shutter speed setting unit based on the motion vector detected by the motion detecting unit. When the motion amount per exposure time corresponding to the shutter speed is a motion amount that is equal to or greater than a threshold value, the image superimposing means performs parallel blurring based on the motion vector detected by the motion vector detecting means. Camera shake that has a strong effect is corrected.

  For example, when a motion vector of the subject is detected by the motion detection means using a through image immediately before shooting and the motion amount per exposure time corresponding to the shutter speed set by the shutter speed setting means is calculated, the motion amount Therefore, when it is determined that the amount of motion per exposure time corresponding to the shutter speed is large, electronic blur correction is performed using the superimposing means. can do.

  With the above configuration, the distance calculating unit calculates the predetermined short distance, and corresponds to the shutter speed set by the shutter speed setting unit based on the motion vector detected by the motion detecting unit. If the amount of motion per exposure time is greater than or equal to the threshold value, parallel blurring appears strongly, and the effect of correcting blurring with the above-mentioned superimposing means is obtained. An effect is obtained that the camera shake is corrected by the optical camera shake correction means and the load on the superimposing means is reduced. This seventh imaging apparatus can also achieve the same effects as the first imaging apparatus of the present invention and the fourth imaging apparatus of the present invention.

  Here, in the seventh photographing apparatus of the present invention, the configuration in which the optical camera shake correction is performed based on the motion vector detected by the motion vector detecting unit has been described. However, instead of the motion vector detecting unit, a gyro sensor is used. It may be used.

An eighth imaging apparatus of the present invention that achieves the above object is an imaging apparatus that generates an image by forming an image of a subject on an imaging element with a shooting optical system.
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the imaging device;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging element based on the angular velocity detected by the gyro sensor; ,
The amount of motion per exposure time corresponding to the shutter speed set by the shutter speed setting unit based on the motion vector calculated by the distance calculation unit and being a predetermined short distance and detected by the motion detection unit is When the amount of motion is greater than or equal to the threshold, a plurality of images are generated in response to a single shooting instruction, the motion detection unit detects a motion vector, and based on the motion vector, the plurality of images are And image superimposing means for superimposing such that subject blur on the image is corrected.

  The eighth imaging apparatus of the present invention can provide substantially the same effect as the second imaging apparatus of the present invention and the fifth imaging apparatus of the present invention.

According to a ninth imaging device of the present invention that achieves the above object, the imaging device generates an image by forming an image of a subject on an imaging element with a photographing optical system.
Motion detection means for obtaining a vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
The amount of motion per exposure time corresponding to the shutter speed set by the shutter speed setting means, based on the motion vector calculated by the distance calculation means to be a predetermined short distance and detected by the motion detection means Is a motion amount that is equal to or greater than the threshold value, receives a single shooting instruction, generates a plurality of images, and based on the angular velocity detected by the gyro sensor during the generation of the plurality of images And an image superimposing means for superimposing the plurality of images so that subject blur on the image is corrected.

  As in the ninth photographing apparatus, the optical camera shake correcting means performs optical camera shake correction based on the angular velocity detected by the gyro sensor, and the image superimposing means superimposes images. May be. The ninth imaging apparatus of the present invention can provide substantially the same effect as the third imaging apparatus and the sixth imaging apparatus of the present invention.

  As described above, an inexpensive photographing apparatus that can accurately correct camera shake is realized.

  FIG. 1 is a diagram showing a configuration of a digital camera 100 according to an embodiment of the present invention. FIG. 1 shows a perspective view of the digital camera 100. FIG. 1A shows a perspective view seen from above the front, and FIG. 1B shows a perspective view seen from above the back. It is shown.

  As shown in FIG. 1A, a lens barrel 170 is provided at the center of the body of the digital camera 100 of this embodiment, and a viewfinder 105 is provided above the lens barrel 170. A shooting auxiliary light emission window 161 is provided on the side of the viewfinder 105. A flash that emits a flash toward the subject through the photographing auxiliary light emission window 161 is provided in the digital camera of this embodiment.

  As shown in FIG. 1B, an operation unit 101 for performing various operations when the user uses the digital camera 100 is provided on the back and top surfaces of the digital camera 100 of the present embodiment. .

  In addition to the power switch 101a for operating the digital camera 100, the operation unit 101 includes a cross key 101b, a menu / OK key 101c, a cancel key 101d, a mode lever 101e, and the like. Depending on the mode lever 101e in the operation unit 101, switching between the reproduction mode and the shooting mode, and further switching between the moving image mode and the still image mode in the shooting mode are performed. When the power switch 101a is turned on while the mode lever 101e is switched to the shooting mode, a moving image (hereinafter, an image captured by the shooting lens is passed through and displayed on the LCD 150. When the release button 102 is pressed during a photo opportunity while viewing the through image, the subject is photographed.

  The digital camera according to the present embodiment includes an optical camera shake correcting unit that optically corrects camera shake and an electronic camera shake correcting unit that electronically corrects camera shake. According to at least one of the states, the camera shake correction is adaptively performed by any one of the camera shake correcting means. Details will be described later.

  When the mode lever 101e is switched to the reproduction side, the already captured image is reproduced and displayed on the LCD 150. In addition, the release button 102 provided in the digital camera 100 of the present embodiment has two operation modes of half-press and full-press, and both photometry and distance measurement are performed inside the digital camera at the timing when the button is half-pressed. The aperture diameter and shutter speed are set according to the photometric value, and after the focus lens is arranged at the focus position that matches the measured subject distance, the shutter is set at the shutter speed set according to the full-press operation. Is driven and exposure is performed by the image sensor. The shutter provided in the digital camera of the present embodiment includes two shutters, a mechanical shutter and an electronic shutter provided in the imaging device. The shutter is used so that the mechanical shutter is used when the shutter speed is slow and cannot be driven by the mechanical shutter. An electronic shutter is used when the speed increases. However, since there is a risk of smearing or the like in still image shooting, a mechanical shutter is used as much as possible. In the live view, a mechanical shutter may be used, but an electronic shutter is mainly used. In the following description, in order to distinguish the through image for the finder from the captured image, the captured image obtained by fully pressing the release button 102 may be referred to as the main image with respect to the through image.

  FIG. 2 is a configuration block diagram of an electrical system inside the digital camera 100 of FIG.

  The internal configuration and operation of the digital camera 100 will be briefly described with reference to FIG.

  2 includes an optical lens system 1701, a timing generation unit 111, a system control unit 110, an aperture adjustment mechanism 1702, an imaging unit 120, a preprocessing unit 130, a camera shake correction unit 140, a signal processing unit 160, a recording / reproduction. A unit 180 and a flash 190 are provided. Although the mechanical shutter is also provided, it is omitted.

  The configuration of each of these units will be described sequentially.

  First, the optical lens system 1701 is configured by combining, for example, a plurality of optical lenses (optical lenses such as a focus lens and a zoom lens). Although not shown, the optical lens system 1701 adjusts the position of the zoom lens in the optical lens system and adjusts the focal length to adjust the position of the focus lens in the optical lens system. An AF (Automatic Focus) adjustment mechanism to be adjusted is included. In operating these mechanisms, the drive signal generated by the timing generator 111 is supplied. In the present embodiment, a camera shake correction mechanism that moves the image sensor in response to camera shake is incorporated in the drive unit 120, and the camera shake correction mechanism is also driven by a drive signal from the timing generation unit 111. In this example, the image pickup device in the image pickup unit 120 is moved to correct camera shake, but the correction lens may be moved.

  The timing generator 111 includes a transmitter that generates a system clock of the digital camera 100. The timing generator 111 further includes a timing signal generator that generates a timing signal synchronized with the system clock. And a drive signal generation unit that generates a drive signal synchronized with the system clock. When a control signal is supplied from the system control unit 110, the timing generation unit 111 outputs a timing signal to the imaging unit 120, the preprocessing unit 130, and the drive signal generation unit in the timing generation unit 111 according to the control signal. To do. The drive signal generation unit in the timing generation unit 111 receives the timing signal and outputs a drive signal to the mechanism or the like. Since the flash 190 is provided with a xenon tube 192 and the light emission of the xenon tube 192 is controlled by the light emission control unit 191, the flash 190 has a light emission control unit from the system control unit 110. The light emission control unit 191 supplied with the control signal 191 controls the light emission of the Xe tube 192.

  The system control unit 110 that supplies a control signal to the timing generation unit 111 includes, for example, a CPU (Central Processing Unit) and a ROM in which the operation procedure of the digital camera 100 is written. In the system control unit 110, for example, a control signal for controlling the operation of each unit is generated using information supplied from the operation unit 101 (including the release button 102) in accordance with a user operation and information on the ROM. The generated control signal is supplied to the timing generation unit 111, the preprocessing unit 130, the camera shake correction unit 140, the signal processing unit 160, the recording / playback unit 180, the flash 190, and the like. Some of the control signals supplied to the flash 190 are related to the number of continuous shots and the amount of light corresponding to the AE process, and the light emission control unit 191 controls the light emission of the xenon tube 192 based on such control signals.

  A diaphragm adjusting mechanism 1702 disposed behind the optical lens system 1701 has an incident light beam cross-sectional area (that is, a diaphragm aperture area) so that an optimum light beam of incident light can be supplied to the imaging device in photographing a subject. It is a mechanism to adjust. A drive signal is supplied to the aperture adjusting mechanism 1702 from the timing generator 111 described above. Although not shown, the driving signal at this time is based on the aperture / exposure time calculated by the system control unit 110 performing AE (Automatic Exposure) processing based on the signal charge photoelectrically converted by the imaging unit 120. The system control unit 110 supplies a control signal corresponding to the aperture / exposure time to the timing generation unit 111 to cause the drive signal generation unit in the timing generation unit 111 to generate a drive signal.

  The imaging unit 120 includes an imaging device that performs photoelectric conversion, and the imaging device is disposed so as to be orthogonal to the optical axis of the imaging optical system. On the incident side of the image pickup element, color filters for color separation corresponding to the individual photoelectric conversion elements are two-dimensionally arranged. In accordance with the timing signal from the timing generator 111, the image sensor performs photoelectric conversion, and the signal charge obtained by the photoelectric conversion is output to the preprocessing unit 130 at a predetermined timing signal, for example, an electronic shutter off timing. . When the digital camera of FIG. 1 is set in the shooting mode, the image pickup device of the present embodiment starts shooting for a through image with a reduced number of pixels, and when the release button 102 is fully pressed during the shooting mode, the through image is displayed. The recording for the recording is interrupted, and the actual recording image is captured.

  The pre-processing unit 130 includes a CDS (Correlated Double Sampling) 131, an A / D 132, and a gamma correction unit 133. The CDS 131 is provided with a clamp circuit and a sample hold circuit. For example, when a CCD solid-state image pickup device is used as the image pickup device in the image pickup unit 120, various kinds of operations generated by the operation of the CCD solid-state image pickup device are used. Noise is removed by the clamp circuit and the sample hold circuit by a timing signal from the timing generator 111. Further, the CDS 131 is provided with an amplifying circuit that amplifies an input signal with a gain corresponding to a control signal from the system control circuit 110, and the signal charge output from the sample and hold circuit from which the various noises are removed. Becomes an accurate color signal (R, G, B) representing the amount of received light and is supplied to the amplifier circuit. After the input color signal is amplified with a predetermined gain by the amplifier circuit, it is quantized with a predetermined quantization level by the A / D 132 and converted into a digital signal. At this time, conversion into a digital signal is performed in accordance with the timing signal from the timing generator 111.

  Further, the gamma correction unit 133 includes a lookup table for gamma correction, and a digital signal subjected to gamma correction corresponding to the digital signal input to the lookup table is output by the lookup table. Then, each color signal converted into a digital signal is supplied to the camera shake correction unit 140.

  Here, although details will be described later, in the present embodiment, the above-described image sensor capable of reading at a high frame rate is used as the image sensor in the image pickup unit of FIG. The short distance is calculated by the system control unit 110, and when the shutter speed is slower than the predetermined shutter speed, a single shooting operation when the release button is fully pressed is performed. The image is taken and the camera shake correction unit 140 (to be described later) electronically corrects the camera shake to capture the main image. For this reason, in the following description, when explaining that high-speed continuous shooting is performed by one shooting operation, an image obtained by performing high-speed continuous shooting is described as a continuous-shot image, and further, The continuous shot image may be described as a first continuous shot image or a second continuous shot image depending on the number of continuous shots. When high-speed continuous shooting is performed so that this electronic blur correction is performed, continuous shooting is performed for the number of continuous shots according to the shutter speed to electronically correct the blur, and the blur is corrected. The image after this is the main image. If the subject distance is a distance exceeding a predetermined short distance, the camera shake correction unit 140 does not perform electronic camera shake correction, and a motion vector is calculated by a correlation calculation unit described later in the camera shake correction unit 140. Is detected, and the image sensor in the imaging unit 120 is moved based on the motion vector to optically correct camera shake.

  That is, in the present embodiment, the system control unit 110, the timing generation unit 111, and the imaging unit 120 constitute an example of an optical camera shake correction unit, and the correlation calculation unit 143 described later constitutes an example of a motion detection unit. Further, the camera shake correction unit 140 constitutes an example of a superimposing unit according to the present invention that corresponds to an electronic camera shake correcting unit.

  Here, with reference to FIG. 3 apart from FIG. 2, the internal configuration of the camera shake correction unit 140 serving as the overlapping means according to the present invention will be described.

  FIG. 3 is a diagram illustrating an internal configuration of the camera shake correction unit 140.

  The camera shake correction unit 140 shown in FIG. 3 includes a frame memory 141, a frame memory unit 142, a correlation calculation unit 143, an address shift unit 144, a synthesis unit 145, and three switches SW1 to SW3. In this example, the frame memory 141 and the frame memory unit 142 are non-destructive type memories that have a size capable of storing R, G, and B color signals for one frame and can be read repeatedly. Yes.

  The configuration and operation of the camera shake correction unit 140 will be described in order from the input side with reference to FIG.

  When the release button 102 is operated while the through image is displayed, when the system control unit 110 detects that the subject distance obtained by the AF process is a predetermined short distance, it is obtained by the AE process. Based on the shutter speed, the number of shots is instructed to the timing generation unit 111 to continuously supply timing signals for the number of shots, thereby causing the imaging unit 120 to start high-speed continuous shooting. When the continuous shooting images are output from the imaging unit 120 to the preprocessing unit 130 one after another, and the conversion processing to the digital signal is performed for each continuous shooting image by the preprocessing unit 130, the image stabilization unit 140 successively continues. Supply a copy image.

  On the other hand, in the camera shake correction unit 140 (see FIG. 3), the camera shake correction is performed electronically by using consecutively supplied images. First, when the first and second continuous shootings of the plurality of continuous shootings performed by operating the release button 102 once are performed, the correlation calculation unit 143 receives the first continuous shooting image and the second continuous shooting. Continuous images are input.

  At this time, both the switch SW1 and the switch SW2 are switched to the a side, and the first continuous shot image stored in the frame memory 141 via the switches SW1 and SW2 together with the correlation calculation unit 143. The frame memory 142 is also supplied and stored.

  In the correlation calculation unit 143 supplied with both the first continuous shot image and the second continuous shot image, a motion vector representing camera shake is detected using these two images. When a motion vector is detected by the correlation calculation unit 143, the switch SW1 and the switch SW2 are both switched to the b side under the control of the system control unit 110, and position data (for example, coordinates) indicating the motion detection vector is used. Data x, y) is supplied to the address shift unit 144. At this time, the contents of the frame memory 141 are rewritten from the first continuous shot image to the second continuous shot image, and the second continuous shot image in the frame memory 141 is transferred to the address shift unit via the contact b of the switch SW1. 144.

  Since the frame memory unit 142 stores the first continuous shot image, the second time so that the address shift unit 144 matches the position of the first continuous shot image in the frame memory unit 142. The position of the continuous shot image is offset, and the second continuous shot image is added based on the first continuous shot image to correct the blur, and the frame memory unit 142 corrects the blur. Is memorized.

  Thereafter, the third continuous shot image, the fourth continuous shot image,... Are supplied to the correlation calculation unit 143 based on the position of the first continuous shot image in the frame memory unit 142, and both images are supplied. A motion vector is detected from the image, and blur correction is performed based on the detected motion vector, and the superimposed image obtained by addition is successively overwritten in the frame memory unit 142.

  In this way, when one shot operation is received and the shot images obtained by continuous shooting of a plurality of sheets are sequentially added and reach a predetermined number, the switch SW3 is turned off by a switching signal from the system control unit 110. Can be switched from close to close.

  Then, the superimposed image in the frame memory 142b is read by the image reading unit 161 of the signal processing unit 160. When the image is read by the signal processing unit 160 shown in FIG. 2, the color separation unit 162 in the signal processing unit 160 selectively distributes each color signal constituting the image, and the color signal of a certain pixel is around the pixel. The color signals of the pixels are interpolated and generated, and each color signal is converted into a plane signal for each screen and supplied to the YC conversion unit 163 in the subsequent stage.

  In the YC conversion unit 163, a YCC signal is generated by the conversion matrix, the YCC signal is further supplied to the image compression unit 164, the YCC signal is compressed by the image compression unit 164, and an image file including the compressed YCC signal and compression information is generated. The data is recorded on the recording medium 181 by the recording / reproducing unit 180.

  In this way, when the subject distance is a predetermined short distance and the shutter speed is slower than the predetermined shutter speed, the camera shake is corrected electronically, and the parallel shake that appears strongly in the short distance shooting is accurately corrected.

  Further, when the subject distance is a subject distance exceeding a predetermined short distance, or when the shutter speed is a shutter speed faster than the predetermined shutter speed, the motion vector detected by the correlation calculation unit 143 is detected. Based on this, the image sensor in the imaging unit 120 is moved to optically correct camera shake. When the subject distance exceeds the predetermined short distance, or when the shutter speed is higher than the predetermined shutter speed, the correlation calculation unit 143 detects the motion vector. 2, it is assumed that another image sensor for detecting a motion vector is provided in the image capturing unit 120 in FIG. 2, and a continuous shot image is supplied from the image sensor.

  With the above configuration, since it is not necessary to use both the gyro sensor and the acceleration sensor, the optical camera shake correcting means according to the present invention and the superimposing means according to the present invention corresponding to the above-described electronic camera shake correcting means are mounted. It is possible to reduce the cost of the photographing apparatus. Further, according to both the subject distance and the shutter speed, the optical camera shake correction unit and the superimposing unit which is an electronic camera shake correction unit are adaptively used to correct the shake with high accuracy.

  Here, the procedure of the above-described camera shake correction processing executed by the system control unit 110 and the signal processing unit will be described in an easy-to-understand manner with reference to the flow of FIG.

  FIG. 4 is a flowchart illustrating the processing procedure of the photographing process executed by the system control unit 110 and the signal processing unit 160. When the mode lever 101e of the operation unit 101 is switched to the shooting mode side and the release button 102 is half-pressed, the system control unit 110 and the signal processing unit cooperate to execute the processing of the flow of FIG.

  In step S401, the system control unit 110 executes AE processing to calculate the aperture diameter and shutter speed, and instructs the timing generation unit to specify the aperture diameter and shutter speed to prepare for driving the shutter. In the next step S402, AF processing is executed, the timing generation unit 111 is instructed about the focus lens focus position, and the focus lens is driven to the focus position.

  When release button 102 is fully pressed, system controller 110 determines in step S403 whether the shutter speed is slower than 1/60, which is the camera shake limit speed. When it is determined in step S403 that the shutter speed is faster than 1/60, the process proceeds to No and jumps to step S407. In step S407, the system control unit 110 corrects camera shake by moving the imaging element in the imaging unit 120 based on the motion vector obtained by the correlation calculation unit 143. After closing the shutter, the system control unit 110 instructs the timing generation unit 111 in step S408 to read an image by outputting an image signal from the imaging unit to the preprocessing unit, and in step S409, the preprocessing unit 130 is read out. The image signal is temporarily stored in a frame memory (not shown) in the pre-processing unit 130 by converting the A / D 132 in the A / D 132 into a digital signal. In step S410, the signal processing unit 160 reads out the image signal in the frame memory and performs image processing such as YC conversion and compression processing. In step S411, the system control unit 110 instructs the recording / playback unit 180 to output the image signal. Is recorded on the recording medium 181 and the processing of this flow is terminated.

  If it is determined in step S403 that the shutter speed is slower than 1/60, the process proceeds to Yes, and in step S404, it is determined whether the subject distance obtained by the AF process in step S402 is 1 m or less or exceeds 1 m. .

  If it is determined in this step S404 that it exceeds 1 m, the process proceeds to the next step S405, and in step S405, the shutter speed is set in the timing generator 111, and exposure is performed by causing the timing generator 111 to set the electronic shutter in the imaging unit 120. To start. In the next step S406, the gain of the amplifier circuit in the CDS 131 is set so as to achieve an appropriate exposure, and in the next step S407, the timing generator 111 is instructed based on the motion vector to drive the image sensor in the imaging unit 120. Shooting is performed while optically correcting camera shake by moving the image sensor according to camera shake. When the exposure is completed, the system control unit 110 instructs the timing generation unit 111 to supply a readout signal from the timing generation unit 111 to the imaging unit 120 and output the image signal in step S408, thereby outputting the image signal to the preprocessing unit 130. read out. In step S409, the A / D 133 performs conversion from an analog signal to a digital signal, and temporarily stores the image signal of the digital signal in the frame memory. In step S410, the signal processing unit 160 reads the image signal in the frame memory and performs signal processing. In step S411, the system control unit 110 receives the end of the signal processing of the signal processing unit 160, instructs the recording / playback unit 180 to record the image signal on the recording medium 181 and ends the processing of this flow.

  On the other hand, if it is determined in step S404 that the subject distance is 1 m or less, the process proceeds to step S412 to calculate the number of continuous shots based on the exposure including the aperture diameter and shutter speed obtained in the AE process of step S401. To instruct the timing generation unit 111 of the number of continuous shots. In step S413, continuous shooting is performed with the number of shots calculated at the shutter speed 1 / f. In the next step S414, the continuous shot images are sequentially output to the preprocessing unit 130 to read out the image signal, and in step S415, the image signal preprocessed by the preprocessing unit 130 is converted into a digital signal image signal. Then, the image is output to the camera shake correction unit 140. In step S416, the camera shake correction unit 140 electronically corrects camera shake based on the motion vector, and stores the image signal in the internal frame memory unit 142. When the signal processing unit detects the flag rewrite when the camera shake correction is indicated by the flag rewrite in the system control unit or the like, the signal processing unit 160 in step S410, the frame memory unit The image signal in 142 is read and signal processing up to image compression is executed. Thereafter, when the system control unit 110 detects rewriting of a flag indicating that the processing of the signal processing unit is completed in step S411, the process proceeds to step S411, and the system control unit 110 records the image signal in the recording / playback unit 180. Recording on the medium is performed and the processing of this flow is completed.

  When the above processing is executed in cooperation between the system control unit 110 and the signal processing unit 160, the camera shake is electronically corrected when the subject distance is a predetermined short distance and the shutter speed is slower than 1/60. Is performed, and camera shake in which the effect of parallel shake appears strongly is corrected with high accuracy. If the shutter speed is faster than 1/60, which is the limit value at which the influence of camera shake appears, the camera shake can be corrected by the optical camera shake correction means, and the image is taken as it is.

  As described above, an inexpensive photographing apparatus that can accurately correct camera shake is realized.

  Next, a second embodiment will be described.

  In the first embodiment, when the image pickup device in the image pickup unit 120 is moved according to camera shake, the image pickup device is set based on the motion vector detected by the correlation calculation unit that constitutes an example of the motion detection unit according to the present invention. Although the moving configuration example is shown, if the gyro sensor 1101 is provided, the angular velocity is detected by the gyro sensor 1101, and the imaging element is moved according to the detected angular velocity, the optical camera shake correction accuracy is further improved.

  FIG. 5 is a diagram showing a configuration in which a gyro sensor 1101 is added to the configuration in FIG. 2, and FIG. 6 is a flowchart showing a procedure of imaging processing performed by the system control unit 110 in FIG.

  The configuration of FIG. 5 is the same as that of FIG. 2 except that a gyro sensor 1101 is added. In FIG. 5, the flash shown in FIG. 2 is omitted, but the flash 190 is provided. The processing procedure of FIG. 6 is the same as that of FIG. 4 except that the processing of step S407 of FIG. 4 is changed to step S407A.

  2 to 4, the movement detected by the correlation calculation unit 143 in the camera shake correction unit 140 when the subject distance exceeds the predetermined short distance and the shutter speed is slower than 1/60. An example in which the image pickup device in the image pickup unit 120 is moved based on the vector to optically correct the camera shake has been described. However, in the configurations of FIGS. 5 and 6, the subject distance exceeds the predetermined short distance. An example in which camera shake is optically corrected by moving the image sensor in the imaging unit 120 based on the angular velocity detected by the gyro sensor 1101 when the subject distance is the subject distance or when the shutter speed is faster than 1/60. It is listed.

  With such a configuration, the number of parts increases as the gyro sensor 1101 is added, which is slightly expensive. However, it is far less expensive than adding an acceleration sensor, and the subject distance is less than a predetermined short distance. The camera shake correction accuracy when the subject distance exceeds the distance is much higher than when correction is performed based on the motion vector. Such a configuration may be adopted.

  Further, when the gyro sensor 1101 is provided, the correlation calculation unit that constitutes an example of the motion vector detection means according to the present invention is omitted, and image superposition is performed based on the angular velocity detected by the gyro sensor 1101. It is possible to configure.

  FIG. 7 shows a third embodiment in which the correlation calculation unit in FIG. 3 is omitted and the camera shake correction unit 140 is configured to superimpose images based on the angular velocity detected by the gyro sensor 1101 shown in FIG. To explain.

  FIG. 7 is a flowchart showing the procedure of the photographing process performed by the system control unit 110 in FIG.

  The processing procedure in FIG. 7 is the same as that in FIG. 4 except that the processing in step S416 in FIG. 6 is changed to step S416A.

  With such a configuration, the correlation calculation unit 143 can be omitted, and both camera shake correction and image superposition can be performed with high accuracy using a gyro sensor.

  Next, fourth, fifth, and sixth embodiments will be described.

  The digital camera shown in FIG. 1 includes a cross key 101b, and the cross key 101b also operates as a zoom switch. When the cross key 101b is operated during the through image display, the cross key 101b operates as a zoom switch to change the shooting magnification of the through image. If shooting is performed when the shooting magnification is increased, the influence of camera shake appears more strongly. Therefore, in the fourth to sixth embodiments, the optical camera shake correction unit and the electronic camera shake correction unit are selectively used according to the photographing magnification in addition to the shutter speed.

  FIG. 8 is a flowchart illustrating the processing procedure of the imaging processing of the fourth embodiment executed by the system control unit 110 of FIG. FIG. 9 is a flowchart showing the processing procedure of the photographing process of the fifth embodiment executed by the system control unit 110 of FIG. Further, FIG. 10 is a flowchart showing a processing procedure of the photographing processing of the sixth embodiment executed by the system control unit of FIG.

  In the fourth embodiment of FIG. 8, the process of step S403 of FIG. 4 is changed to the process of step S403A, and in the fifth embodiment of FIG. 9, the process of step S403 of FIG. 6 is changed to the process of step S403A. In the sixth embodiment of FIG. 10, the process of step S416 of FIG. 6 is changed to step S416A.

  In the process of step S403A, when determining whether or not the shutter speed is slower than 1 / f (focal length), the shutter speed is less than 1 / f, where f is the focal distance when a 35 mm film is placed on the imaging surface. Determine if it is too slow. With this configuration, it is determined whether or not the shutter speed is slower than 1 / f, assuming that a 35 mm film is placed on the imaging plane, no matter what size imaging device is placed on the imaging plane. As a result, the photographing magnification can be determined more accurately.

  The fourth embodiment is a modification of the first embodiment. In the fourth embodiment, when the subject distance exceeds a predetermined distance based on the motion vector in the process of step S407, or the photographing magnification is small. The optical camera shake correction means, that is, the camera shake is corrected by moving the image sensor.

  The fifth embodiment is a modification of the second embodiment. In the fifth embodiment, when the subject distance is a distance exceeding a predetermined distance, or when the photographing magnification is small, in step S407A. Camera shake is corrected based on the angular velocity detected by the gyro sensor.

  According to the configuration of FIG. 9, when the shutter speed is 1 / f or less in step S403A, or the subject distance exceeds the predetermined short distance in step S404, the gyro sensor is processed in step S407A. Based on the angular velocity detected at 1101, the image pickup device in the image pickup unit 120 is moved to optically correct camera shake.

  With the configuration of the fifth embodiment, the number of parts increases as the gyro sensor 1101 is added, but the cost is slightly higher than the addition of an acceleration sensor, and the shutter speed is 1 / f. The camera shake correction accuracy when the subject distance is faster or the subject distance exceeds a predetermined short distance (1 m) is much improved compared to the correction based on the motion vector.

  The sixth embodiment is a modification of the third embodiment. In the sixth embodiment, the images are accurately superimposed based on the angular velocity detected by the gyro sensor in step S415A.

  According to the configuration of the fourth to sixth embodiments, when the subject distance is a predetermined short distance, the photographing magnification is larger than the predetermined magnification, and the shutter speed is slower than 1/60, the electronic Accordingly, camera shake is corrected and camera shake is corrected with high accuracy. When the shutter speed is faster than 1/60, which is a limit value at which the influence of camera shake appears, or when the shooting magnification is smaller than a predetermined magnification, shooting is performed while correcting the camera shake by the optical camera shake correction unit. Done.

  As described above, an inexpensive photographing apparatus that can accurately correct camera shake is realized.

  Next, a seventh embodiment, an eighth embodiment, and a ninth embodiment will be described.

  As described above, in the digital camera shown in FIGS. 1 and 2, when the digital camera shown in FIG. 1 is set to the shooting mode, the number of pixels is decreased and shooting for the through image is started. When pressed, shooting for the through image is interrupted and the actual image for recording is taken.

  Therefore, in the digital camera of the seventh embodiment, the shake calculation state of the photographing apparatus when the photographer is about to photograph is detected by the correlation calculation unit 143 in the camera shake correction unit 140 using the through image, and the system control unit When 110 receives the detection result and determines that the shake is large and there is a problem with the way to hold the digital camera, electronic shake correction is executed.

  FIG. 11 is a diagram for explaining the seventh embodiment.

  The processing of the seventh embodiment in FIG. 11 is executed by a system control unit of a digital camera having the outer shape of FIG. 1 and the internal configuration of FIGS.

  FIG. 11 is the same as the process in FIG. 4 except that the process in step S403 is changed to step S403B.

  In the seventh embodiment of FIG. 11, the correlation calculation unit 143 in the camera shake correction unit 140 shown in FIGS. 2 and 3 detects a motion vector based on a through image immediately before photographing, receives the motion vector, and performs system control. When the unit 110 calculates the motion vector amount per shutter speed at the time of shooting in step S403B and determines that the motion vector amount is 2 pixels or more and the subject distance is 1 m or less in step S404, the photographer's attitude Since the subject distance is 1 m or less and parallel blur is likely to occur, the electronic camera shake correction function is used to superimpose a plurality of images in steps S412 to S416 to correct camera shake. It is configured to do.

  Even in such a configuration, it is not necessary to use both the gyro sensor and the acceleration sensor. Therefore, the optical camera shake correction means referred to in the present invention and the superposition referred to in the present invention corresponding to the above-described electronic camera shake correction means. It is possible to reduce the cost of the photographing apparatus on which the means is mounted. In addition, depending on both the subject distance and the attitude of the photographer (depending on the skill and shooting scene), the optical camera shake correction means and the electronic camera shake correction means are used adaptively and the camera shake is accurate. Corrected well.

  FIG. 12 is a diagram for explaining the eighth embodiment.

  The process of the eighth embodiment in FIG. 12 is executed by a system controller of a digital camera having the outer shape of FIG. 1 and the internal configuration of FIGS. FIG. 12 is the same as the process in FIG. 11 except that the process in step S407 in FIG. 11 is changed to step S407A.

  In the eighth embodiment shown in FIG. 12, instead of detecting the motion vector by the correlation calculation unit 143 as shown in FIG. 11, the gyro sensor 1101 is provided and the angular velocity is detected by the gyro sensor 1101.

  With such a configuration, the number of parts increases as the gyro sensor 1101 is added, which is slightly expensive. However, it is far less expensive than adding an acceleration sensor, and the subject distance is less than a predetermined short distance. When the subject distance is exceeded, or when the amount of motion vector is small, the camera shake correction accuracy is much improved as compared with the case based on the motion vector. Such a configuration may be adopted.

  FIG. 13 is a diagram for explaining the ninth embodiment.

  The processing of the ninth embodiment in FIG. 13 is executed by a system controller of a digital camera having the outer shape of FIG. 1 and the internal configuration of FIGS. 11 is the same as the process in FIG. 11 except that the process in step S416 in FIG. 11 is changed to step S416A.

  Based on the angular velocity detected by the gyro sensor 1101, both camera shake correction and image superposition are performed. Even if it is such a structure, the effect equivalent to 1st-6th embodiment is acquired.

It is a figure which shows the structure of the digital camera 100 which is one Embodiment of this invention. FIG. 2 is a configuration block diagram of an electrical system inside the digital camera 100 of FIG. 1. 3 is a diagram illustrating an internal configuration of a camera shake correction unit 140. FIG. 5 is a flowchart illustrating a processing procedure of imaging processing executed by a system control unit 110 and a signal processing unit 160. It is a figure which shows the structure which added the gyro sensor 1101 to the structure of FIG. It is a flowchart which shows the procedure of the imaging | photography process which the system control part 110 of FIG. 5 implements. It is a flowchart which shows the procedure of another imaging | photography process which the system control part 110 of FIG. 5 implements. It is a flowchart which shows the process sequence of the imaging | photography process of 4th Embodiment which the system control part 110 of FIG. 2 performs. It is a flowchart which shows the process sequence of the imaging | photography process of 5th Embodiment which the system control part 110 of FIG. 5 performs. It is a flowchart which shows the process sequence of the imaging | photography process of 6th Embodiment which the system control part 110 of FIG. 5 performs. It is a figure explaining 7th Embodiment. It is a figure explaining 8th Embodiment. It is a figure explaining 9th Embodiment. It is a figure explaining a parallel shake and a rotation shake.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Digital camera 101 Control element group 102 Release button 105 Finder 110 System control part 111 Timing generation part 120 Imaging part 130 Preprocessing part 140 Camera shake correction part 141 Frame memory 142 Frame memory part 143 Correlation calculating part 144 Address shift part 145 Synthesis | combination part 150 LCD
Reference Signs List 160 Signal processing unit 170 Lens barrel 1701 Lens optical system 1702 Aperture adjustment mechanism 180 Recording / reproducing unit 181 Recording medium

Claims (9)

In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
Based on the motion vector detected by the motion detection means, optical camera shake correction means for correcting camera shake by moving at least a part of the optical member composed of the imaging optical system and the imaging element;
When the distance calculating means calculates that the distance is a predetermined short distance and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed, a single shooting instruction is received. Generating a plurality of images, causing the motion detection means to detect a motion vector, and superimposing the plurality of images based on the motion vector so that subject blur on the image is corrected And a photographing device. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
When the distance calculating means calculates that the distance is a predetermined short distance and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed, a single shooting instruction is received. Generating a plurality of images, causing the motion detection means to detect a motion vector, and superimposing the plurality of images based on the motion vector so that subject blur on the image is corrected And a photographing device. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
When the distance calculating means calculates that the distance is a predetermined short distance and the shutter speed set by the shutter speed setting means is a shutter speed slower than the predetermined shutter speed, a single shooting instruction is received. A plurality of images are generated, and the plurality of images are overlaid on the basis of the angular velocity detected by the gyro sensor during the generation of the plurality of images so that subject blur on the image is corrected. An image pickup apparatus comprising image superimposing means for combining. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
A shooting magnification setting means for setting a shooting magnification;
Based on the motion vector detected by the motion detection means, optical camera shake correction means for correcting camera shake by moving at least a part of the optical member composed of the imaging optical system and the imaging element;
The distance calculating means calculates that the distance is a predetermined short distance, and the shooting magnification set by the shooting magnification setting means is larger than a predetermined magnification, and is further set by the shutter speed setting means. When the shutter speed is lower than the predetermined shutter speed, a plurality of images are generated in response to a single shooting instruction, the motion detection means detects the motion vector, and the motion vector is And an image superimposing unit that superimposes the plurality of images so that subject blur on the image is corrected. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
A shooting magnification setting means for setting a shooting magnification;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
The distance calculating means calculates that the distance is a predetermined short distance, and the shooting magnification set by the shooting magnification setting means is larger than a predetermined magnification, and is further set by the shutter speed setting means. When the shutter speed is lower than the predetermined shutter speed, a plurality of images are generated in response to a single shooting instruction, the motion detection means detects the motion vector, and the motion vector is And an image superimposing unit that superimposes the plurality of images so that subject blur on the image is corrected. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
A shooting magnification setting means for setting a shooting magnification;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
The distance calculating means calculates that the distance is a predetermined short distance, and the shooting magnification set by the shooting magnification setting means is larger than a predetermined magnification, and is further set by the shutter speed setting means. When the shutter speed is lower than the predetermined shutter speed, a plurality of images are generated in response to one shooting instruction, and the gyro sensor detects the plurality of images during the generation. An imaging apparatus comprising: an image superimposing unit that superimposes the plurality of images so as to correct subject blur on the image based on the angular velocity that has been corrected. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
Based on the motion vector detected by the motion detection means, optical camera shake correction means for correcting camera shake by moving at least a part of the optical member composed of the imaging optical system and the imaging element;
The amount of motion per exposure time corresponding to the shutter speed set by the shutter speed setting means, based on the motion vector calculated by the distance calculation means to be a predetermined short distance and detected by the motion detection means Is a motion amount greater than or equal to a threshold value, a single shooting instruction is received to generate a plurality of images, the motion detection means detects a motion vector, and the plurality of images are detected based on the motion vector. And an image superimposing unit that superimposes the images so that subject blur on the image is corrected. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a motion vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
The amount of motion per exposure time corresponding to the shutter speed set by the shutter speed setting means, based on the motion vector calculated by the distance calculation means to be a predetermined short distance and detected by the motion detection means Is a motion amount greater than or equal to a threshold value, a single shooting instruction is received to generate a plurality of images, the motion detection means detects a motion vector, and the plurality of images are detected based on the motion vector. And an image superimposing unit that superimposes the images so that subject blur on the image is corrected. In an imaging device that generates an image by forming an image of an object on an image sensor with an imaging optical system,
Motion detection means for obtaining a vector representing the motion of a subject on an image obtained by the image sensor;
A distance calculating means for calculating a subject distance;
Shutter speed setting means for setting the shutter speed;
An optical camera shake correction unit that includes a gyro sensor and corrects camera shake by moving at least a part of the optical member including the imaging optical system and the imaging device based on the angular velocity detected by the gyro sensor; ,
The amount of motion per exposure time corresponding to the shutter speed set by the shutter speed setting means, based on the motion vector calculated by the distance calculation means to be a predetermined short distance and detected by the motion detection means Is a motion amount that is equal to or greater than the threshold value, receives a single shooting instruction, generates a plurality of images, and based on the angular velocity detected by the gyro sensor during the generation of the plurality of images An imaging apparatus comprising: an image superimposing unit that superimposes the plurality of images so that subject blur on the image is corrected.

Images