JP2018093390A - Imaging apparatus, character recognition unit and image information creation program - Google Patents

Abstract

An object of the present invention is to obtain a uniformly focused image of a subject having different in-focus positions from a position immediately below the lens to an end deviated from the position immediately below the lens. An image pickup unit that picks up a subject a plurality of times at different in-focus positions and image information that is in focus among image information picked up by a plurality of image sensors at each in-focus position is obtained. An imaging apparatus is provided that includes a creation unit that creates imaging information from information on a region specified for each of the plurality of times of imaging with reference to a storage unit that stores the regions in association with each other. [Selection] Figure 7

Description

  The present invention relates to an imaging device, a character recognition device, and an imaging information creation program.

  There are devices that acquire images and recognize characters in the acquired images. For example, when an original is placed on a flat table and an image is read while moving the head like a flat head scanner, each position of the subject and the reading lens are the same distance.

  On the other hand, in an overhead scanner, a document camera, or the like, as shown in FIG. 1, an image of the entire surface of the subject 100 is read at a time by an image pickup device 13 built in the document camera or the like. In this case, because of the curvature of field of the lens 11, the focus distance differs between the central portion and the peripheral portion, and the distance from the lens 11 to the position immediately below the lens of the subject 100 and the distance to the end of the subject 100 There will be a difference. For example, when the focus is on the center, the periphery of the document becomes blurred. Therefore, if the depth of field (hereinafter referred to as “focus distance”) is shallow, the end portion of the subject 100 even when the front position a of the lens of the subject 100 is in focus as shown in FIG. In b, the focus is shifted.

  Therefore, a technique is known in which a focus position is moved by focus bracket shooting to perform a plurality of shootings, and an image focused on the main subject is extracted from the plurality of images obtained by the shooting (for example, Patent Documents). 1).

JP 2010-114577 A

  However, in the above method, the user needs to arbitrarily set a focus position. In the above method, the processing load when synthesizing images is high, and the required memory capacity increases.

  Therefore, in one aspect, an object of the present invention is to obtain a uniformly focused image of a subject having different in-focus positions from a position immediately below the lens to an end portion that is off from the lens.

  In one proposal, an imaging unit that captures a subject multiple times at different in-focus positions and image information that is in focus among image information captured by a plurality of image sensors at each in-focus position are obtained. An imaging apparatus is provided that includes a creation unit that creates imaging information from information on a region specified for each of the plurality of times of imaging with reference to a storage unit that stores the associated regions in association with each other. .

  According to one aspect, it is possible to obtain a uniformly focused image of a subject having different in-focus positions from a position immediately below the lens to an end portion that is off from the lens.

The figure which shows an example of imaging | photography with a camera. The figure which shows an example of the hardware constitutions of the camera which concerns on one Embodiment. The figure which shows an example of the hardware constitutions of the tablet terminal which concerns on one Embodiment. The figure which shows an example of the function structure of the camera which concerns on one Embodiment. The figure which shows an example of the reading data table which concerns on one Embodiment. The figure which shows an example of a function structure of the tablet terminal which concerns on one Embodiment. 6 is a flowchart illustrating an example of imaging information creation processing according to an embodiment. The figure which shows an example of the partial image information reading at the time of imaging | photography concerning one Embodiment. The figure which shows an example of the system configuration | structure which concerns on one Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, the duplicate description is abbreviate | omitted by attaching | subjecting the same code | symbol.
<First Embodiment>
[Example of hardware configuration of imaging apparatus]
First, an example of a hardware configuration of an imaging apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 2 shows an example of a hardware configuration of the digital camera 10 which is an example of the imaging apparatus according to the present embodiment.

  A digital camera 10 according to the present embodiment includes a lens 11, a lens driving mechanism 12, an image sensor 13, an MPU (Micro-processing unit) 14, a ROM (Read Only Memory) 15, a RAM (Random Access Memory) 16, and a communication interface 17. Have

  The lens 11 includes a zoom lens, a focus lens, a diaphragm, and a mechanical shutter. The lens 11 is driven by the lens driving mechanism 12 to perform zooming, focusing, changing the aperture amount (F value) of the diaphragm, and opening / closing the mechanical shutter. The lens driving mechanism 12 realizes an autofocus function.

  The image sensor 13 is arranged at the rear stage of the lens 11 and receives subject light transmitted through the lens 11. The ROM 15 is a non-volatile memory that stores various basic programs and data. The RAM 16 is a volatile memory that temporarily stores an imaging information creation program for creating imaging information and various tables.

  The MPU 14 reads out a basic program, an imaging information creation program and various data from a storage device such as the ROM 15 and the RAM 16, and executes processing such as basic processing of the device and imaging information creation processing, thereby controlling and mounting the entire device. It is an arithmetic unit that realizes the function.

  The communication interface 17 is an interface for connecting the digital camera 10 to a network. Accordingly, the digital camera 10 can perform data communication with other devices (for example, an OCR (Optical character recognition) device or the like) via the communication interface 17.

[Other examples of hardware configuration of imaging apparatus]
Next, another example of the hardware configuration of the imaging apparatus according to the present embodiment will be described with reference to FIG. FIG. 3 shows an example of a hardware configuration of the tablet terminal 20 which is another example of the imaging apparatus according to the present embodiment.

  The tablet terminal 20 according to the present embodiment includes a camera mechanism 10 ′, a touch panel 21, a USB (Universal Serial Bus) controller 22, a CPU (Central Processing Unit) 23, a ROM 24, a RAM 25, an LCD (liquid crystal display) 26, and a communication interface 27. And a power supply 28.

  The camera mechanism 10 ′ includes a lens 11, a lens driving mechanism 12, and an image sensor 13. The functions of the lens 11, the lens driving mechanism 12, and the image sensor 13 are the same as the corresponding functions of the digital camera 10 shown in FIG.

  The touch panel 21 is formed of, for example, glass, plastic, or the like, and has a light-transmitting base body, a surface-provided position detection electrode provided on the base body, and a light-transmitting position detection electrode. A capacitive touch panel having an insulating layer provided may be used. The touch panel 21 is disposed in front of an LCD 26 which is an example of a display, and by touching a portion corresponding to an image displayed on the LCD 26, coordinate data corresponding to the image can be input.

  The camera mechanism 10 ′ and the touch panel 21 are connected to the CPU 23 via the USB controller 22. The ROM 24 and RAM 25 are the same as the ROM 15 and RAM 16 in FIG.

  The CPU 23 reads the basic program, the imaging information creation program and various data from a storage device such as the ROM 24 and the RAM 25, and executes basic processing of the device, imaging information creation processing, and the like, thereby controlling and mounting the entire device. It is an arithmetic unit that realizes the function.

  The communication interface 27 is an interface for connecting the tablet terminal 20 to a network. Thereby, the tablet terminal 20 can perform data communication with other devices via the communication interface 27. The power supply 28 supplies power to each unit when the power button is turned on.

[Example of functional configuration of imaging apparatus]
Next, an example of a functional configuration of the imaging apparatus according to the present embodiment will be described with reference to FIG. FIG. 4 illustrates an example of a functional configuration of the digital camera 10 that is an example of the imaging apparatus according to the present embodiment.

  The digital camera 10 according to the present embodiment includes a lens driving unit 31, an imaging unit 32, a storage unit 33, a reading unit 36, and a creation unit 37. The lens driving unit 31 moves the position of the lens 11 and changes the position where the subject 100 is focused. When reading the subject 100, the lens driving unit 31 moves the position of the lens 11 so that the focus is adjusted from the center to the periphery of the subject 100. When reading the subject 100, the lens driving unit 31 may move the position of the lens 11 so that the focus is adjusted from the periphery of the subject 100 toward the center.

  The imaging unit 32 images the subject 100 using the imaging element 13. The imaging unit 32 captures the subject 100 a plurality of times at different in-focus positions.

The storage unit 33 stores a read data table 34, an imaging information creation program 35, and various data. An example of the read data table 34 is shown in FIG. As shown in FIG. 5A, the read data table 34 stores the movement distance of the lens 11 and the image reading area in association with each other. Specifically, the read data table 34 stores an area where image information that is in focus among image information captured by the plurality of image sensors 13 is obtained in association with each in-focus position. The image reading area shown in FIG. 5A indicates a position where the images on the plurality of image sensors 13 shown in FIG. 5B are read. Regions A to G are partial image information of locations to be read from among the images on the plurality of image pickup devices 13 at different movement distances of the lenses 11, that is, at different in-focus positions. 4 is a region obtained in order from the peripheral region to the central region of the imaging range. The reading unit 36 in FIG. 4 reads partial image information of locations where images on the plurality of image sensors 13 are read. Thereby, in each of a plurality of times of image capturing, image information that is in focus among image information captured by the plurality of image sensors 13 is obtained.

  The reading unit 36 refers to the read data table 34 and reads partial image information of a location “a portion in focus is projected” on the image sensor 13. For example, when the movement distance of the lens 11 defined in the read data table 34 is 0 mm, the focus position is the center of the subject 100. In this case, the reading unit 36 refers to the reading area defined in the reading data table 34 shown in FIG. 5A, and in the imaging area Ar shown in FIG. Read partial image information of the area.

  When the lens driving unit 31 moves the position of the lens 11 and the moving distance of the lens 11 is 0.2 mm, the reading unit 36 reads the reading area defined in the reading data table 34 shown in FIG. Referring to FIG. 5B, among the images on the plurality of image pickup devices 13, partial image information of the “B” area on the outer periphery of the “A” area is read. In this way, the reading unit 36 reads the partial image information of the region where the focused image information is obtained from the image information captured by the plurality of image sensors 13 based on the read data table 34.

  In this way, for example, when the lens driving unit 31 moves the position of the lens 11 so that the focusing position moves from the central part of the subject 100 toward the peripheral part, the reading unit 36 sets the in-focus position. In accordance with the change of the area, information on the areas obtained in order from the central area to the peripheral area of the imaging range by the plurality of imaging elements 13 is read. When referring to the read data table 34 in FIG. 5, the reading unit 36 reads partial image information from the region A to the region G.

  Further, for example, when the lens driving unit 31 moves the position of the lens 11 so that the focusing position is adjusted from the periphery of the subject 100 toward the center, the reading unit 36 changes the focus position. Accordingly, the information of the areas obtained in order from the peripheral area to the central area of the imaging range by the plurality of imaging elements 13 is read. When referring to the read data table 34 in FIG. 5, the reading unit 36 reads partial image information from the region G to the region A.

  At the time of imaging, when the moving distance of the lens 11 is 0 mm, the reading unit 36 stores the image on the image sensor 13 in the A area at the address of the storage unit 33 corresponding to the A area. Next, the reading unit 36 stores the image on the image pickup device 13 in the B area at the address of the storage unit 33 corresponding to the A area in a state where the moving distance of the lens 11 is 0.2 mm. This is stored in the address of the storage unit 33 corresponding to the C area to the G area. The creation unit 37 refers to the storage unit 33 and creates imaging information from information on areas specified for each of a plurality of times of imaging. As a result, it is possible to read an image in which all the focus from the center to the periphery of the subject 100 is in focus.

  In the case of the read data table 34 of FIG. 5, the imaging unit 32 performs the imaging of seven times, and the creation unit 37 uses the partial image information of the area specified for each of the seven imagings to capture the image of the subject 100. Create information.

  As described above, in the present embodiment, data on how much the lens 11 is moved from the state where the focus is in the center and the focus on the peripheral portion is stored in advance in the read data table 34 of FIG. Then, when the lens 11 is moved and the focus (focus position) is moved from the central part to the peripheral part or from the peripheral part to the central part, the reading position focused is specified according to the reading data table 34. The

  This eliminates the process of focusing from the central part to the peripheral part or from the peripheral part to the central part. Thereby, the focus can be moved at high speed from the central part to the peripheral part or from the peripheral part to the central part, and blurring of image reading due to camera shake can be minimized.

  The read data table 34 in FIG. 5 is divided into seven stages of image read areas, but the present invention is not limited to this. The reading data table 34 may store an image reading area in two stages, for example, a peripheral area and a central area, or may store an image reading area in three or more stages. .

  In the digital camera 10 according to the present embodiment, the MPU 14 executes imaging information creation processing using the imaging information creation program 35 and various data stored in the storage unit 33. Thereby, the functions of the reading unit 36 and the creating unit 37 are realized.

  The information stored in the read data table 34 can be stored in the storage unit 33, a server connected via a network, another server on the cloud, or the like.

  If the reading data table 34 divided into two-stage image reading areas is selected by the reading unit 36, the imaging unit 32 moves the lens and performs two shootings. In this case, the creation unit 37 refers to the read data table 34 in which different areas from which image information that is in focus with respect to each of the two in-focus positions is obtained are stored in association with each other and differ from a plurality of times of imaging. Imaging information is created using information on a specific area.

[Other examples of functional configuration of imaging apparatus]
Next, another example of the functional configuration of the imaging apparatus according to the present embodiment will be described with reference to FIG. FIG. 6 shows an example of a functional configuration of the tablet terminal 20 which is another example of the imaging apparatus according to the present embodiment.

  The tablet terminal 20 according to the present embodiment includes a lens driving unit 31, an imaging unit 32, a storage unit 33, a reading data table 34, an imaging information creation program 35, a reading unit 36, a creation unit 37, a character recognition engine 38, and a character recognition unit. 39.

  Here, description of the same functions as those of the digital camera 10 shown in FIG. 4 is omitted, and only the character recognition engine 38 and the character recognition unit 39 stored in the storage unit 33 not having the functions of the digital camera 10 will be described. .

  The character recognition unit 39 uses the character recognition engine 38 to perform character recognition from the image information of the subject 100 created by the creation unit 37. Thereby, the tablet terminal 20 can implement | achieve an OCR (Optical character recognition) function.

  Note that the digital camera 10 illustrated in FIG. 4 and the tablet terminal 20 illustrated in FIG. 6 may include a communication unit. As a result, the digital camera 10 and the tablet terminal 20 can communicate image information created in other devices or communicate recognized character information. The function of the communication unit can be realized by the communication interfaces 17 and 27, for example.

  Moreover, the function of the lens drive part 31 of the digital camera 10 and the tablet terminal 20 is realizable by the lens drive mechanism 12, for example, and the function of the imaging part 32 is realizable by the image sensor 13, for example. The functions of the storage unit 33 of the digital camera 10 and the tablet terminal 20 can be realized by the ROMs 15 and 24 and the RAMs 16 and 25, for example. The functions of the reading unit 36 and the creation unit 37 of the digital camera 10 can be realized by the MPU 14, for example. The functions of the reading unit 36, the creation unit 37, and the character recognition unit 39 of the tablet terminal 20 can be realized by the CPU 23, for example.

[Imaging information creation processing]
Next, an example of imaging information creation processing according to the present embodiment will be described with reference to FIG. FIG. 7 is a flowchart illustrating an example of imaging information creation processing according to the present embodiment. The process of FIG. 7 is performed by the tablet terminal 20, for example. In the digital camera 10 that does not have the character recognition function, the processes in steps S10 and S18 are performed without performing the processes in steps S20 and S22.

  First, the imaging unit 32 focuses on the center of the subject 100 such as a document by using the autofocus function, performs shooting in this state, and the reading unit 36 starts reading an image (step S10).

  At this time, as shown in FIG. 8A, since the lens 11 is not moved, the moving distance of the lens 11 is 0 mm. Therefore, the reading unit 36 refers to the reading data table 34 and determines that the A area corresponding to the in-focus position is a position where partial image information is read, and images the A area that is a position directly below the lens 11. The image on the element 13 is stored at the address of the storage unit 33 corresponding to the A area.

  Next, when the lens driving unit 31 starts moving the lens 11, the focus of the lens 11 moves from the central part toward the peripheral part. In response to this, the reading unit 36 refers to the read data table 34 and extracts partial image information of an area corresponding to the moving distance of the lens 11 among the images on the plurality of image pickup devices 13 from the image pickup by the image pickup unit 32. Read (step S12).

  As shown in FIG. 8B, when the moving distance of the lens 11 becomes 0.2 mm, the region B as the focus position is identified as the position where partial image information is read based on the read data table 34. it can. Accordingly, the reading unit 36 stores the image on the image sensor 13 in the B area at the address of the storage unit 33 corresponding to the B area.

  Next, the reading unit 36 determines whether reading of the entire area of the image sensor 13 has been completed (step S14). If the reading of the entire area of the image sensor 13 has not been completed, the reading unit 36 returns to step S12 and repeats the processes of steps S12 and S14.

  Here, reading of the entire area of the image sensor 13 is not completed. Therefore, returning to step S12, the lens driving unit 31 further moves the lens 11, and the imaging unit 32 performs imaging (step S12). As illustrated in FIG. 8C, when the moving distance of the lens 11 becomes 0.4 mm, the reading unit 36 refers to the read data table 34 and displays an image on the image sensor 13 in the C region. The data is stored in the address of the storage unit 33 corresponding to the area (step S12).

  In this way, the processes in steps S12 and S14 are repeated until the image on the image sensor 13 in the G area set in the read data table 34 shown in FIG. 5 is stored at the address of the storage unit 33 corresponding to the G area. It is. When step S14 is executed at this point, the reading unit 36 determines that reading of the entire area of the image sensor 13 has been completed, and the imaging unit 32 finishes shooting (step S16).

  Next, the creation unit 37 creates captured image information from each partial image information stored at a specific address for each of a plurality of times of imaging with reference to the storage unit 33 (step S18). Next, the character recognition unit 39 determines whether or not to perform character recognition of the created captured image information (step S20). If it is determined that the character recognition unit 39 recognizes the character, the character recognition engine 38 outputs the captured image information created by the creation unit 37, performs character recognition (step S22), and ends this process. On the other hand, if the character recognizing unit 39 determines not to recognize the character, the present process is terminated.

  As described above, according to the imaging information creation processing using the imaging apparatus according to the present embodiment, one object 100 having different in-focus positions from a position immediately below the lens to an end portion that is off from the lens is one. In this way, an in-focus image can be obtained.

  For example, in a conventional technique such as focus bracket shooting, when the shutter is pressed five times and five shots are taken, all the image information for the five shots of the entire shot subject is transferred to the memory. At this time, if the memory transfer of the previous image information is not completed, the memory transfer of the next image information cannot be performed. For this reason, it takes a long time to shoot five areas in focus and transfer the captured image information to the memory. In addition, it takes time to extract the focused area from the image information for five times stored in the memory and synthesize the image.

  On the other hand, according to the imaging information creation process using the imaging apparatus according to the present embodiment, the movement distance of the lens 11 and the region to be the focus position (that is, the reading position of the partial image information) are stored in advance. Based on the read data table 34, it is possible to read an image that is in focus in all areas from the center to the periphery of the document. In the example of the above embodiment, the imaging apparatus stores the image information on the imaging element 13 corresponding to the areas A to G of the subject 100 at the addresses of the storage unit 33 corresponding to the areas A to G, respectively. deep. That is, since the partial image information of the photographed subject is transferred to the memory, the amount of information is small. Therefore, the transfer time can be reduced. Also, image information of the subject can be created from the transferred partial image information of each area. For this reason, in this embodiment, it is not necessary to synthesize images. This can also reduce the processing load and increase the processing speed.

  From the above, according to the imaging information creation process using the imaging apparatus according to the present embodiment, the subject 100 having different in-focus positions from the position immediately below the lens to the end portion that is off the lens is uniformly focused. A matched image can be obtained. At this time, it is possible to reduce a processing load until an image with a uniform focus on the subject 100 is obtained, and a desired image can be created in a short time. As a result, by performing character recognition based on the created image information, it is possible to accurately recognize characters on the subject (such as a document) and to perform from the photographing of the subject 100 to the output of the character recognition result in a short time. be able to.

  In addition, image reading blur due to camera shake can be minimized by high-speed focus movement from the center to the periphery.

  As described above, the imaging device, the character recognition device, and the imaging information creation program have been described in the above embodiment. However, the imaging device, the character recognition device, and the imaging information creation program according to the present invention are not limited to the above embodiment. Various modifications and improvements are possible within the scope of the invention. In addition, when there are a plurality of the above-described embodiments and modifications, they can be combined within a consistent range.

  For example, the imaging device according to the present invention is not limited to the digital camera 10 or the tablet terminal 20. The imaging apparatus according to the present invention is applied to wearable display devices such as a smartphone having an imaging function, a PDA (Personal Digital Assistants), a mobile phone, a portable video processing apparatus, an HMD (Head Mount Display), and an FMD (Face Mount Display). May be.

  Further, for example, it goes without saying that the system including the imaging apparatus according to the present embodiment has various system configuration examples depending on the application and purpose. For example, as shown in FIG. 9A, a system configuration in which a digital camera 10, a tablet terminal 20, and other devices (PC 50, smartphone 60, etc.) are connected to each other via a network 30 relates to the present embodiment. 1 is an aspect of a system.

  In this case, the digital camera 10 may perform the image creation process (steps S10 to S18) in FIG. 8, and the tablet terminal 20 may perform the character recognition process (steps S20 and S22) in FIG. Moreover, you may perform the process of all the steps of FIG. Moreover, if PC50 and the smart phone 60 have a character recognition function, an image creation process may be performed with the digital camera 10, and a character recognition process may be performed with the tablet terminal 20, PC50, or the smart phone 60. FIG.

  In this way, among the imaging information creation processing, the image creation processing and the character recognition processing may be performed by different devices, and the processing may be distributed, or the image creation processing and the character recognition processing may be performed by one device. May be.

Regarding the above description, the following items are further disclosed.
(Appendix 1)
An imaging unit for imaging a subject multiple times at different in-focus positions;
With reference to a storage unit that stores a region in which image information that is in focus among image information captured by a plurality of imaging elements at each in-focus position is obtained and associated with each in-focus position, the imaging is performed a plurality of times. A creation unit that creates imaging information from information on areas specified for each of the
An imaging apparatus having
(Appendix 2)
The creation unit refers to the storage unit, information on a region obtained sequentially from a peripheral region to a central region of the imaging range in accordance with a change in focus position at the time of the multiple imaging, or imaging Create imaging information from area information obtained sequentially from the central area to the peripheral area,
The imaging apparatus according to appendix 1.
(Appendix 3)
An imaging unit for imaging a subject multiple times at different in-focus positions;
With reference to a storage unit that stores a region in which image information that is in focus among image information captured by a plurality of imaging elements at each in-focus position is obtained and associated with each in-focus position, the imaging is performed a plurality of times. A creation unit that creates imaging information from information on areas specified for each of the
A character recognition unit that performs character recognition of the created imaging information;
A character recognition device.
(Appendix 4)
The creation unit refers to the storage unit, information on a region obtained sequentially from a peripheral region to a central region of the imaging range in accordance with a change in focus position at the time of the multiple imaging, or imaging Create imaging information from area information obtained sequentially from the central area to the peripheral area,
The character recognition device according to attachment 3.
(Appendix 5)
A process of performing multiple imaging on a subject at different in-focus positions;
With reference to a storage unit that stores a region in which image information that is in focus among image information captured by a plurality of imaging elements at each in-focus position is obtained and associated with each in-focus position, the imaging is performed a plurality of times. A process of creating imaging information from information on areas specified for each of the
Imaging information creation program for causing a computer to execute the process.
(Appendix 6)
Referring to the storage unit, information on a region obtained in order from a peripheral region to a central region of the imaging range according to a change in focus position at the time of the plurality of times of imaging, or a central portion of the imaging range Including the process of creating imaging information from the information of the area obtained sequentially from the area to the peripheral area,
The imaging information creation program according to attachment 5.

DESCRIPTION OF SYMBOLS 10 Digital camera 11 Lens 12 Lens drive mechanism 13 Image sensor 14 MPU
15 ROM
16 RAM
17 Communication Interface 20 Tablet Terminal 21 Touch Panel 22 USB Controller 23 CPU
24 ROM
25 RAM
26 LCD
27 Communication Interface 31 Lens Drive Unit 32 Imaging Unit 33 Storage Unit 34 Reading Data Table 35 Imaging Information Creation Program 36 Reading Unit 37 Creation Unit 38 Character Recognition Engine 39 Character Recognition Unit 100 Subject

Claims (4)

An imaging unit for imaging a subject multiple times at different in-focus positions;
With reference to a storage unit that stores a region in which image information that is in focus among image information captured by a plurality of imaging elements at each in-focus position is obtained and associated with each in-focus position, the imaging is performed a plurality of times. A creation unit that creates imaging information from information on areas specified for each of the
An imaging apparatus having The creation unit refers to the storage unit, information on a region obtained sequentially from a peripheral region to a central region of the imaging range in accordance with a change in focus position at the time of the multiple imaging, or imaging Create imaging information from area information obtained sequentially from the central area to the peripheral area,
The imaging device according to claim 1. An imaging unit for imaging a subject multiple times at different in-focus positions;
With reference to a storage unit that stores a region in which image information that is in focus among image information captured by a plurality of imaging elements at each in-focus position is obtained and associated with each in-focus position, the imaging is performed a plurality of times. A creation unit that creates imaging information from information on areas specified for each of the
A character recognition unit that performs character recognition of the created imaging information;
A character recognition device. A process of performing multiple imaging on a subject at different in-focus positions;
With reference to a storage unit that stores a region in which image information that is in focus among image information captured by a plurality of imaging elements at each in-focus position is obtained and associated with each in-focus position, the imaging is performed a plurality of times. A process of creating imaging information from information on areas specified for each of the
Imaging information creation program for causing a computer to execute the process.

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