JP2005269130A - Imaging device with camera shake correcting function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging device which can correct shading exactly corresponding to a shading distribution that is changed accompanied by a camera shake correction. <P>SOLUTION: In the imaging device, a camera shake correction controller 93 receives the amount of a calculated camera shake correction, and decides the position of an imaging element by an imaging element positioning unit 91. A shading correction amount deciding unit 102 calculates the amount of the shading correction by obtaining data of a correction amount from a shading correction amount lookup table (LUT) 103 based on the positional information of the imaging device given from the camera shake correction controller 93. A shading correction amount changing unit 101 receives the amount of the shading correction calculated by the shading correction amount deciding unit 102, and performs the shading correction. Thus, the shading correction according to the camera shake correction can be performed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an imaging apparatus such as a digital camera, and more particularly to an imaging apparatus having a camera shake correction function.

  The amount of light at the periphery of image data acquired by a digital camera is lower than the amount of light at the center. This phenomenon is called shading (peripheral light intensity drop), and the effect increases as the lens size is reduced.

  Since shading degrades the quality of acquired image data, a technique for correcting shading has been proposed. This shading is caused by the characteristics of an image pickup element that is an image pickup element of a digital camera or a photographing lens that is an image pickup means including an optical system that guides light to the image pickup element to form an image on the image pickup element. Occur. Therefore, the digital camera measures and stores the light amount reduction rate for each pixel under the image sensor and the photographing lens included in the digital camera in advance, and stores the obtained image data for the light amount reduction rate for each pixel. By correcting based on this, it is possible to acquire image data that has undergone shading correction.

  However, a digital camera that corrects shading using the above-described shading correction method performs shading correction by using a fixed light amount reduction rate for each pixel, and therefore shading is performed when the shading distribution changes according to shooting. There was a problem that correction could not be performed properly.

  For example, in an imaging device using an on-chip lens in which a small lens is attached to each pixel of the imaging device so that a large amount of light can be collected, the incident angle of the light changes due to the change in the aperture of the lens. The shading distribution changes under the influence of the change in the incident angle. In such an imaging apparatus, since the conventional shading correction method cannot perform appropriate shading correction, Japanese Patent Laid-Open No. 5-83622 discloses a signal that follows the aperture so that shading correction can be performed according to the aperture of the lens. Proposed is an imaging device provided with an address generation circuit that converts the address into ROM addressing, a ROM that outputs a shading correction amount, and a shading correction signal generation circuit that can change a shading correction signal according to the shading correction amount. When the lens aperture is changed by the imaging apparatus proposed in Japanese Patent Laid-Open No. 5-83622, the address of the shading correction amount written in the ROM in advance is specified according to the signal following the aperture, and from the specified address When the ROM reads the shading correction amount, a necessary shading correction amount can be obtained.

On the other hand, some recent digital cameras include a camera shake correction function that corrects image movement caused by camera shake during shooting. For example, a digital camera equipped with a camera shake correction function based on an image sensor swing method is capable of moving an image sensor included in the digital camera in a direction perpendicular to the optical axis, and a camera shake correction unit included in the digital camera. The camera shake correction is performed by moving the image sensor to the target position calculated by the camera shake correction unit according to the camera shake amount detected by the camera shake detection unit included in
JP-A-5-83622

  Here, we consider shading in a digital camera equipped with a camera shake correction function. When the image sensor moves due to the camera shake correction function during the exposure time, the shading distribution on the image sensor surface changes from moment to moment. Since conventional shading correction technology does not support such a shading distribution that changes every moment, a digital camera that corrects shading using the conventional shading correction method cannot cope with changes in shading distribution caused by camera shake correction. The problem was that the influence of shading could not be corrected.

  In order to solve the above-described problems, an object of the present invention is to provide an imaging apparatus capable of accurately performing shading correction in accordance with a shading distribution that varies with camera shake correction.

  In order to achieve the above object, according to the present invention, an image pickup device, an image pickup unit including an optical system that guides light to the image pickup device to form an image on the image pickup device, and an image on the image pickup device due to camera shake. In an imaging apparatus having a camera shake correction unit that corrects movement of the image and a shading correction unit that corrects unevenness in image brightness between different parts on the imaging device, the shading correction amount included in the shading correction unit The determination unit obtains information related to camera shake correction from the camera shake correction unit, determines a shading correction amount according to the information, and the shading correction unit corrects shading according to the shading correction amount determined by the shading correction amount determination unit. It is configured to do. By adopting such a configuration, it is possible to perform shading correction corresponding to a shading distribution that changes in accordance with camera shake correction applied to camera shake that changes from moment to moment.

  Here, the camera shake correction means may perform camera shake correction by moving the image sensor in a direction perpendicular to the optical axis of the optical system. In this case, the information related to the correction of camera shake obtained from the camera shake correction unit includes at least the position information of the image sensor.

  The camera shake correction means may perform camera shake correction by moving the optical element in a direction perpendicular to the optical axis of the optical system. In this case, the information related to the correction of the camera shake obtained from the camera shake correction unit includes at least the position information of the optical element.

  In the configuration in which the image sensor is moved to perform camera shake correction, the shading correction amount determination unit may determine the shading correction amount based on the movement locus of the image sensor during the imaging time.

  In the configuration in which the optical element is moved to perform the camera shake correction, the shading correction amount determination unit may determine the shading correction amount based on the movement locus of the optical element during the imaging time.

  The movement trajectory is sampled every predetermined time, the movement amount at the sampled moment is obtained, and the movement amount obtained for each sampling is integrated, so that the shading correction amount is calculated based on the integrated value of the movement amount. It does not matter as what you want.

  Furthermore, the imaging apparatus may include a calculation amount instruction unit that instructs the calculation amount for determining the shading correction amount to the shading correction amount determination unit. For example, when the movement trajectory is sampled as described above and a necessary shading correction amount is obtained based on the sampled movement value, the calculation related to the calculation for obtaining the shading correction amount from the sampled movement amount. Suppose that the amount can be indicated. Also, the number of samplings may be instructed in the same way. With such a configuration, it is possible to instruct the quality of image data obtained from the imaging device and the time for shading correction performed by the imaging device.

  The calculation amount related to the shading correction can be specified by changing the sampling method or by the element obtained by the sampling (the element here is an imaging apparatus that performs camera shake correction by moving the imaging element). Means an imaging element, and in an imaging apparatus that performs camera shake correction by movement of an optical element, it means an optical element.) By changing the method for calculating the required shading correction amount from the positional information, Also good.

  For example, the element trajectory is sampled with a sampling time shorter than the exposure time, and the shading correction is performed by calculating the shading correction amount necessary for the image data from the shading correction value corresponding to each position of the sampled element. Can be. Further, by reducing the number of samplings, regarding each sampled position information of the element, the average value of the position information is regarded as the position information of the element, and with the shading correction amount in the position information obtained by the average value, It is also possible to perform shading correction by a method of calculating a shading correction amount necessary for the image data.

  By using the method of obtaining the shading correction amount from the average value of the sampled position information, it is possible to reduce the calculation amount related to the shading correction. Note that the sampling number may be one point, and in this case, the shading correction amount in the sampled position information corresponds to the shading correction amount necessary for the image data.

  According to the image pickup apparatus of the present invention, it is possible to perform shading correction corresponding to a shading distribution that changes along with camera shake correction, and it is possible to prevent deterioration in image quality due to shading even during camera shake correction.

  In addition, even when the imaging apparatus performs camera shake correction by either the movement of the optical element or the movement of the imaging element, the imaging apparatus has the camera shake correction information including the position information of the element and corresponds to the movement locus of the element. By determining the shading correction amount, it is possible to easily perform appropriate correction.

  Furthermore, since the imaging apparatus has an instruction unit that can instruct a correction calculation amount for determining a shading correction amount, the quality of image data obtained from the imaging apparatus and the time required for the shading correction performed by the imaging apparatus can be reduced. It becomes possible to instruct.

  <1. Configuration of Digital Camera> FIGS. 1, 2, and 3 are external views of a digital camera 1 according to an embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a rear view, and FIG. is there.

  As shown in FIG. 1, the digital camera 1 has a photographing lens 3 on the front, and a shutter release button 2 that accepts an image data acquisition start instruction on the upper surface. As shown in FIG. 2, the digital camera 1 has an electronic viewfinder 4 and an LCD monitor 6 on the back, and the user can confirm a preview image and a reproduced image by electronic images. At this time, the selection of the display image can be arbitrarily set by the user using the electronic viewfinder changeover switch 5. The playback frame advance switch and zoom switch 7 are switches for performing a zoom operation and a frame advance operation during playback.

  As shown in FIG. 3, the digital camera 1 has an operation mode changeover switch 8 on the upper surface, and when the user presses the changeover switch 8, the mode of the digital camera 1 is changed between a shooting mode and a playback mode. It is possible to switch between. Further, when the user operates the camera shake correction start switch 9, the digital camera 1 performs camera shake correction.

  The shading correction amount determination switch 10 at the time of camera shake correction is for the user to control the calculation amount for the digital camera 1 to determine the shading correction amount at the time of camera shake correction. One of 0, a small amount of calculation, a medium amount of calculation, and a large amount of calculation can be selected. By controlling the calculation amount related to the shading correction, the user apparently adjusts the length of time from the release until the next release becomes possible. When the calculation amount is 0, the time until the next release becomes possible is the shortest. As the calculation amount is increased, the time until the next release becomes possible becomes longer.

  <2. Photographing Process> FIG. 4 is a diagram showing a configuration related to the imaging process of the digital camera 1. The image sensor 21 is a single-plate area image sensor in which primary color transmission filters of R (red), G (green), and B (blue) are provided in a checkered pattern in pixel units, and is an interlace readout type. 3 is photoelectrically converted into an R, G, B color component pixel signal and output.

  The digital camera 1 controls the exposure amount to the image sensor by the aperture driver 33 according to a preset program diagram based on the light amount data measured by the image sensor 21.

  That is, at the time of image recording, the camera control unit 30 drives the aperture driver 33 to fix the optical aperture value to be open, and the charge accumulation time of the image sensor 21 is the amount of light measured in the photometry area selected by the image sensor 21. It is calculated based on the exposure control data obtained by the camera control unit 30 according to the data. Based on the calculated exposure control data, the sensor drive 31 performs feedback control based on a preset program diagram so that the exposure time to the image sensor 21 is appropriate.

  The signal generated by photoelectric conversion in the image sensor 21 is output as a signal indicating the amount of received light when the charge accumulation is completed, and is shifted to a transfer path in the image sensor 21 that is shielded from light. Read through. The output image signal is sampled by a CDS (Correlated Double Sampling) circuit 22, noise of the image sensor is removed, and then the sensitivity is corrected by an AGC (Auto Gain Control) circuit 23.

  The A / D converter 24 is a 12-bit AD converter, and digitizes the analog signal corrected by the AGC circuit 23. The digital signal is subjected to predetermined processing by the image processing unit 40 and then converted into image data. The image data captured by the image processing unit 40 is written into the image memory 41 in synchronization with the reading of the image sensor 21. Subsequent image processing is performed by the image processing unit 40 accessing data stored in the image memory 41.

  In the image data on the image memory 41, RGB pixels are masked by the RAW interpolation processing unit 42 with respective filter patterns, and necessary RGB color signals are extracted. Further, the pixel interpolation processing unit 51 performs color interpolation of the image data. At that time, G having pixels up to a high band is replaced with an average value of intermediate binary values of the surrounding four pixels by a median (intermediate value) filter, and average interpolation is performed for R and B.

  The image data subjected to the pixel interpolation is subjected to horizontal and vertical reduction or thinning by the resolution conversion processing unit 52, and the resolution is converted to the set number of recorded image pixels. Further, when the image is displayed, the image data is subjected to horizontal pixel thinning by the resolution conversion processing unit 52, and then the thinned low resolution image is displayed by the LCD monitor 6 and the electronic viewfinder 4. The

  The image data whose resolution has been converted is subjected to RGB white balance adjustment by the color balance control unit 53 performing RGB gain correction independently. That is, the color balance control unit 53 estimates a portion that is originally considered to be white from the subject to be photographed from luminance and saturation data and the like, and calculates an average of each RGB, a G / R ratio, and a G / B ratio in that portion. Correction control is performed by correcting the required R and B gains derived from the obtained values.

  The shading correction is performed by the shading correction unit 55 on the image data subjected to the white balance adjustment. The gamma correction unit 54 performs nonlinear conversion so that the image data is appropriately output to each output device. The image data that has undergone each process is stored again in the image memory 41.

  At the time of preview, a low-resolution image of 640 * 240 pixels is read from the image memory 41, and the low-resolution image is encoded into NTSC / PAL by the video encoder 61 and then is displayed on the electronic finder 4 or the LCD monitor 6. Displayed. At the time of image recording, an image with the set recording resolution is read from the image memory 41, and the read image is compressed by the image compression circuit 43. The compressed image is recorded on the memory card 72 via the memory card driver 71. On the other hand, at the time of image recording, the image memory 41 records an image with a designated resolution, and at the same time records a reduced image (VGA) created for reproduction display in the image processing unit 40 in a state linked to the image. Yes. When the recorded image is reproduced, the LCD monitor 6 displays the VGA, thereby enabling high-speed image display.

  At the time of camera shake correction, a shake signal from a camera shake detection unit 36 composed of a gyroscope or the like is detected, and a camera control unit 30 performs an operation for calculating the direction and amount of camera shake to calculate a camera shake correction amount. The position detection unit 32 is controlled to perform camera shake correction based on the calculated camera shake correction amount. At this time, the position detection signal detected by the position detection unit 32 is sampled to obtain a movement locus of the imaging element (or optical element) as described later.

  The ranging calculation processing unit 44 is provided to realize autofocus in the digital camera 1. For example, the digital camera 1 is based on image data obtained by sequentially capturing images by the image sensor 21 during live view display. Measure the distance between the subject and the subject. Then, the ranging calculation processing unit 44 gives the ranging value obtained from the image data to the camera control unit 30, and the camera control unit 30 uses the focus motor driver 34 based on the ranging value input from the ranging calculation processing unit 44. The photographic lens 3 is driven to perform autofocus control.

  <3. Shading Correction> There are two types of camera shake correction: an optical lens swing method and an image sensor swing method. FIG. 5 shows a basic configuration of the optical lens swing method. In this method, camera shake correction is performed by moving a predetermined optical lens in a direction perpendicular to the optical axis. The camera shake correction unit 201 for moving the optical lens and the image sensor 21 are independent of each other, and the camera shake correction unit 201 exists in the lens barrel.

  FIG. 6 shows a basic configuration of the image sensor swing method. In this method, image stabilization is performed by moving the image sensor 21 in a direction perpendicular to the optical axis. The camera shake correction unit 202 has a configuration in which the imaging device 21 is attached to a stage (xy stage) movable in an orthogonal coordinate system, and according to the amount of camera shake detected by a sensor configured by a gyro etc. in the unit 202. Then, the target position of the image sensor 21 is calculated. The xy stage positions the image sensor at the target position.

  The present invention can be applied to both the optical lens swing method and the image sensor swing method. The following description will focus on application to the image sensor swing method.

  FIG. 7 shows the position of the image sensor 21 in the image circle 203. During the camera shake correction, the image sensor 21 moves based on the camera shake correction amount. Since the shading distribution on the surface of the image sensor 21 is different between when the center of the image sensor is at the position A and at the position B, the shading distribution on the surface of the image sensor is caused by the movement of the image sensor 21 during camera shake correction. The moving locus of the image sensor 21 affects the captured image.

  FIG. 8 shows the relationship between the image sensor position (x-axis) with respect to the optical axis and the shading amount. The same applies to the relationship between the image sensor position (y-axis) and the shading amount (not shown). When a certain part of the image sensor moves from A to B, the shading amount in that part changes by δ. Similarly, the amount of shading changes when moving from another position to another position. Therefore, it is necessary to change the correction amount related to the shading correction according to the position of the image sensor.

  FIG. 9 shows a configuration related to the shading correction process. The camera shake correction control unit 93 is in the camera control unit 30, calculates a camera shake correction amount (image sensor target position) from the output value of the image sensor position detection unit 92 and the output value of the camera shake detection unit 36, and performs imaging. The hand movement correction amount is output to the element positioning unit 91 as a command value. The output of the image sensor 21 is input to the shading correction amount changing unit 101 via the image data capturing unit 20 and the image processing unit 40. The shading correction amount determination unit 102 obtains correction amount data from the shading correction amount lookup table (LUT) 103 based on the image sensor position information from the camera shake correction control unit 93, and performs shading of each pixel by a method described later. A correction amount is calculated.

  In response to the shading correction amount calculated by the shading correction amount determination unit 102, the shading correction amount change unit 101 performs shading correction. The image data subjected to the shading correction is displayed or recorded after various image processing is performed by the image processing unit 40. That is, the image displayed by the LCD monitor 6 or the electronic viewfinder 4 and the image recorded by the image memory 41 or the memory card 72 are images subjected to shading correction.

  FIG. 10 shows the relationship between the image sensor position relative to the optical axis and the shading correction amount per unit exposure time. The shading correction amount is expressed as a function f (x, y) of the image sensor position (x, y). The shading correction amount is obtained by measurement using a luminance box or the like. The shading correction amount LUT 35 has the shading correction amount in the form of a table or a function.

  FIG. 11 shows an example of the movement locus of the image sensor 21 at the exposure time t. In FIG. 11, (a) shows the movement locus in the x-axis direction of the image sensor 21, and (b) shows the movement locus in the y-axis direction. During camera shake correction, the image sensor positioning unit 91 operates to determine the target position of the image sensor 21 so as to follow the target value calculated by the camera shake correction controller 93 based on the output value of the camera shake detector 36. Since the image sensor position detection unit 92 in the camera shake correction unit 90 can detect the position of the image sensor 21, a movement locus as shown in FIG. 11 can be obtained. The image sensor position detector 92 uses an optical encoder or a magnetic encoder that detects the position as a digital value. Further, there is a PSD (position detecting element) for detecting the position as an analog value, and this can also be adopted.

Here, the amount of shading correction when the position detected by the image sensor position detection unit 92 is the center of the image sensor will be considered. The sampling interval for position detection is Δt (where Δt = t / n, where the sampling number is n + 1), and the shading correction amount per unit time at the image sensor position (x, y) at a certain moment is f (x, y ), The shading correction amount S (0, 0) at the center pixel (0, 0) of the image sensor is obtained by the equation (1).
S (0,0) = f (x0, y0) Δt + f (x1, y1) Δt +... + F (xn-1, yn-1) Δt + f (xn, yn) Δt (1)

Further, the shading correction amount S (α, β) located at a position (α, β) away from the center of the image sensor is obtained by equation (2).
S (α, β) = f (x0 + α, y0 + β) Δt + f (x1 + α, y1 + β) Δt + ...
+ f (xn-1 + α, yn-1 + β) Δt + f (xn + α, yn + β) Δt (2)

  The digital camera 1 performs shading correction on all the pixels of the image sensor according to equation (2). If the correction error is acceptable, increasing the sampling interval Δt can reduce the number of samplings and increase the processing speed of the shading correction. The number of samples can be selected by the user by pressing the shading correction amount determination switch 10 at the time of camera shake correction as described above.

  FIG. 12 shows another example of the movement trajectory of the image sensor at the exposure time t. Similarly to FIG. 11, (a) shows the movement locus in the x-axis direction of the image sensor, and (b) shows the movement locus in the y-axis direction. Compared to the case of FIG. 11, the movement locus of the image sensor in FIG. 12 is gentle. The actual camera shake is about 10 Hz, and the movement locus in FIG. 12 is realistic considering the shutter speed during normal hand-held shooting. In the case of the movement trajectory shown in FIG. 12, it is not necessary to take as many samplings as shown in FIG. 11 for the image sensor position detection unit 92 to detect the position of the image sensor 21, and the number of samplings can be reduced. it can. In this case, the average value of each sampling value is approximately regarded as the position information of the image sensor 21, and the shading correction amount at that position can be set as a necessary correction amount.

In FIG. 12, sampling is performed at two positions at the start and end of exposure. In this case, the shading correction amount S (α, β) in the pixel at the position (α, β) at the exposure time t is obtained by the equation (3).
S (α, β) = f (((x0 + x1) / 2) + α), ((y0 + y1) / 2) + β) t (3)

  Although FIG. 12 shows a case where the number of samplings is two, any number of samplings may be used. Compared with the shading correction method (FIG. 11) that calculates the shading correction amount for all the pixels at the sampled image sensor position (FIG. 11), the average value of the sampling values is regarded as position information. In the correction method (FIG. 12), the amount of calculation related to the shading correction is small, and the processing speed is increased.

FIG. 13 shows still another example of the movement locus of the image sensor at the exposure time t. Similarly to FIGS. 11 and 12, (a) shows the movement locus of the image sensor in the x-axis direction, and (b) shows the movement locus in the y-axis direction. In FIG. 13, sampling is performed only once at the center position of the exposure time. At this time, the shading correction amount S (α, β) in the pixel at the position (α, β) is obtained by the equation (4).
S (α, β) = f (x0 + α, y0 + β) t (4)

  The calculation method of the shading correction amount shown in FIG. 13 has the smallest amount of calculation, and therefore the processing time is the shortest. Note that the amount of calculation can be reduced to zero when no shading correction is required for the camera shake correction for each release as in continuous shooting. As described above, the user can select the calculation amount related to the shading correction by the shading correction amount determination switch 10 at the time of camera shake correction. When the calculation amount is large, the user performs the shading correction by the shading correction method shown in FIG. In this case, shading correction is performed by the method shown in FIG. 12, and when the calculation amount is small, shading correction is performed by the method shown in FIG. In addition, when the shading correction accompanying the camera shake correction is not performed, the calculation amount 0 can be selected.

  As shown above, by having an instruction means for instructing the amount of calculation for determining the shading correction amount, the amount of calculation is increased to increase the quality of image data, such as continuous shooting. When the time until the next release is shortened, the calculation amount can be reduced or set to 0, and selection according to the situation intended by the photographer is possible.

1 is a front view of a digital camera 1 according to an embodiment of the present invention. FIG. 3 is a rear view of the digital camera 1. FIG. 2 is a top view of the digital camera 1. FIG. 3 is a diagram illustrating a configuration related to an imaging process of the digital camera 1. The figure which shows the basic composition of camera shake correction by an optical lens swing system. The figure which shows the basic composition of camera shake correction by an image sensor swing system. The figure which shows the position of the image pick-up element in an image circle. The figure which shows the relationship between the image pick-up element position (x-axis) with respect to an optical axis, and shading amount. The figure which shows the structure regarding a shading correction process. The figure which shows the relationship between the image pick-up element position with respect to an optical axis, and the shading correction amount per unit exposure time. The figure which shows the example (large amount of calculation) of the movement locus | trajectory of an image pick-up element. The figure which shows another example (in the amount of calculations) of the movement locus | trajectory of an image pick-up element. The figure which shows another example (small amount of calculations) of the movement locus | trajectory of an image pick-up element.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital camera 2 Shutter release button 3 Shooting lens 4 Electronic viewfinder 5 Electronic viewfinder changeover switch 6 LCD monitor 7 Playback frame advance switch and zoom switch 8 Operation mode changeover switch 9 Camera shake correction start switch 10 Shading correction amount determination switch for camera shake correction DESCRIPTION OF SYMBOLS 20 Image data acquisition part 21 Image pick-up element 22 CDS circuit 23 AGC circuit 24 A / D converter 30 Camera control part 31 Timing generator sensor drive 32 Camera shake correction drive / position detection 33 Aperture driver 34 Focus motor driver 35 Camera operation switch 36 Camera shake Detection unit 40 Image processing unit 41 Image memory 42 RAW interpolation processing unit 43 Image compression circuit 44 Distance calculation processing unit 51 Pixel interpolation processing unit 52 Image conversion processing unit 53 Color balance control unit 54 Gamma correction unit 55 Shading correction unit 60 Image display unit 61 Video encoder 70 Image recording unit 71 Memory card driver 72 Memory card 90 Camera shake correction unit 91 Image sensor positioning unit 92 Image sensor position detection 92 Unit 93 Camera shake correction control unit 100 Shading correction unit 101 Shading correction amount changing unit 102 Shading correction amount determining unit 103 Shading correction amount LUT
201 Image stabilization unit for moving an optical lens 202 Image stabilization unit for moving an image sensor 203 Image circle Δt Sampling interval t Exposure time x1, x2,..., Xn Image sensor position (x axis)
y1, y2, ..., yn Image sensor position (y-axis)

Claims (6)

  An image pickup device including an image pickup device, an optical system that guides light to the image pickup device to form an image on the image pickup device, and a camera shake correction device that corrects the movement of the image on the image pickup device due to camera shake; A shading correction unit that corrects unevenness in image brightness between different parts on the imaging device, and obtains information on correction of camera shake from the camera shake correction unit, and according to the information An imaging apparatus, comprising: a shading correction amount determination unit that determines a shading correction amount, wherein the shading correction unit corrects shading according to the shading correction amount determined by the shading correction amount determination unit.   The camera shake correction unit performs camera shake correction by moving the image sensor in a direction perpendicular to the optical axis of the optical system, and the information on the camera shake from the camera shake correction unit includes at least position information of the image sensor. The imaging apparatus according to claim 1.   The camera shake correction unit performs camera shake correction by moving a part of the optical system in a direction perpendicular to the optical axis of the optical system, and information on camera shake from the camera shake correction unit includes at least position information of the optical element. The imaging apparatus according to claim 1, comprising:   The imaging apparatus according to claim 2, wherein the shading correction amount determination unit determines a shading correction amount based on a movement trajectory of the imaging element during an imaging time.   The imaging apparatus according to claim 3, wherein the shading correction amount determination unit determines a shading correction amount based on a movement trajectory of the optical element during the imaging time.   The imaging apparatus according to claim 1, further comprising a calculation amount instruction unit that instructs a calculation amount for determining a shading correction amount to the shading correction amount determination unit.

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