JP2007166551A - Imaging apparatus, control method of imaging apparatus, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable an appropriate contraction according to scale factor of an electronic zoom or a sensitivity setting at the time of shooting. <P>SOLUTION: In a system control circuit 50, according to scale factor of the electronic zoom, when it is judged that magnification processing of RAW data is required, setting of magnification zoom parameter of a magnification zoom circuit 28 for RAW data is performed. Picture data acquired through an A/D converter 14 is read from a memory 22 through a memory control circuit 18 into the magnification zoom circuit 28. After performing magnification processing of RAW data, the data is written in a memory 22. The RAW data to which magnification processing was performed is read into a compression/expansion circuit 26 through the memory control circuit 18, the DPCM translation for loss-less compression and loss-less compression processing of Huffman coding, etc. are performed, and writing in the memory 22 is performed. After that, a write processing into a record medium 24 of compression data stream written in the memory 22 is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an imaging apparatus, an imaging apparatus control method, and a computer program.

  In an imaging device such as an electronic camera, the image signal generated by the imaging device is A / D converted into digital data, and in many cases, after necessary image processing is performed, lossy compression processing such as JPEG encoding is performed, Recording on a recording medium is performed.

  When it is desired to record image data without degrading image quality, lossless compression processing is performed and recording as RAW data on a recording medium is performed.

JP 2002-84547 A

  By the way, recent advances in semiconductor technology have led to a rapid increase in resolution of image sensors, and a tendency to increase the file size of recorded image data.

  However, for many users who want to enjoy printing on the L size or the like, a pixel count of about 3 million pixels is sufficient. Image data having a number of pixels exceeding 10 million pixels is excessive as information and causes an increase in file size. Furthermore, the influence of random noise on recorded image data is becoming more prominent due to the influence of pixel miniaturization accompanying the increase in resolution. These problems occur similarly when recording as RAW data.

  In Patent Document 1, before performing image processing such as interpolation processing, the image data output from the image sensor is subjected to size conversion in advance while retaining the filter array, so that the subsequent image processing time and resizing processing time. In addition, a technique is disclosed that has an effect of reducing memory usage and the like.

  It is an object of the present invention to appropriately perform reduction conversion according to the magnification of electronic zoom and the set sensitivity at the time of shooting.

The imaging apparatus of the present invention includes an imaging unit that photoelectrically converts light from a subject to generate an image signal, an A / D conversion unit that A / D converts an image signal output from the imaging unit, and the A / D An electronic zoom unit that obtains a zoom effect by cutting out part of image data after A / D conversion by the D conversion unit, and an image cut out by the electronic zoom unit while retaining the filter array of the image data And a first data conversion means for converting the data to a predetermined first size regardless of the magnification of the electronic zoom.
Another imaging apparatus of the present invention includes an imaging unit that photoelectrically converts light from a subject to generate an image signal, an A / D conversion unit that A / D converts an image signal output from the imaging unit, Sensitivity setting means for setting the sensitivity at the time of shooting of the image pickup means, and image data after A / D conversion by the A / D conversion means, while maintaining the filter arrangement of the image data, the set sensitivity at the time of shooting And a data conversion means for performing a reduction conversion to a size corresponding to the above.
An imaging apparatus control method according to the present invention includes: an imaging unit that photoelectrically converts light from a subject to generate an image signal; an A / D conversion unit that A / D converts an image signal output from the imaging unit; An image pickup apparatus control method comprising: an electronic zoom unit that obtains a zoom effect by cutting out part of image data after A / D conversion by the A / D conversion unit, the filter array included in the image data The image data cut out by the electronic zoom means while maintaining the image data has a data conversion procedure for reducing and converting the image data to a predetermined size regardless of the magnification of the electronic zoom.
Another control method for an image pickup apparatus according to the present invention includes an image pickup means for photoelectrically converting light from a subject to generate an image signal, and an A / D conversion means for A / D converting the image signal output from the image pickup means. And a sensitivity setting means for setting the sensitivity at the time of shooting of the imaging means, wherein the A / D conversion means performs A / D conversion while holding the filter array of the image data. It has a data conversion procedure for reducing and converting the image data after D conversion into a size corresponding to the set sensitivity at the time of photographing.
The computer program of the present invention includes an imaging unit that photoelectrically converts light from a subject to generate an image signal, an A / D conversion unit that A / D converts an image signal output from the imaging unit, and the A / D A computer program for controlling an image pickup apparatus including an electronic zoom unit that obtains a zoom effect by cutting out part of image data after A / D conversion by a D conversion unit, the filter included in the image data The computer is caused to execute a data conversion process for reducing and converting the image data cut out by the electronic zoom means into a predetermined size regardless of the magnification of the electronic zoom while maintaining the arrangement.
Another computer program of the present invention includes an imaging unit that photoelectrically converts light from a subject to generate an image signal, an A / D conversion unit that A / D converts an image signal output from the imaging unit, A computer program for controlling an image pickup apparatus including sensitivity setting means for setting sensitivity at the time of shooting by the image pickup means, wherein the A / D conversion means performs A while maintaining the filter array of the image data. The computer is caused to perform data conversion processing for reducing and converting the image data after / D conversion into a size corresponding to the sensitivity set at the time of shooting.

According to the present invention, image data necessary for desired electronic zoom processing can be reduced and converted to an image size that can be said to be necessary and sufficient for many users, and can be provided to the user. Reduction is possible.
Further, if the reduction conversion is not performed, the conversion is not performed, so that it is possible to prevent the random noise from increasing due to the expansion conversion.
Also, by switching the magnification method according to the electronic zoom magnification, image data with reduced random noise is provided on the low magnification side, and image data with higher resolution than conventional image data is provided on the high magnification side. be able to.

  According to another aspect of the present invention, it is possible to provide the user with a reduced image size that is optimal for the random noise reduction effect according to the setting sensitivity at the time of shooting, and to provide the user with reduction of line dam noise and file size. Reduction is possible.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a diagram illustrating a configuration of an imaging apparatus 100 according to an embodiment of the present invention. In the figure, reference numeral 10 denotes a lens unit having a zoom mechanism, a diaphragm mechanism, and the like. Reference numeral 12 denotes an imaging device (for example, a CCD device) that converts an optical image into an electrical signal. Reference numeral 14 denotes an A / D converter that converts an analog output signal of the image sensor 12 into an electric signal. Reference numeral 16 denotes a timing generation circuit that supplies a clock signal and a control signal to the image sensor 12, the A / D converter 14, and the D / A converter 30, and is controlled by the system control circuit 50.

  Reference numeral 18 denotes a memory control circuit, which includes an A / D converter 14, an image processing circuit 20, a memory 22, a recording medium 24, a compression / decompression circuit 26, a D / A converter 30, a RAW data scaling circuit (a scaling circuit). A) Data transfer control is performed between 28 and the YUV data scaling circuit (magnification circuit B) 29. Data output from the A / D converter 14 is recorded in the memory 22 or through the image processing circuit 20 and the memory control circuit 18 or only through the memory control circuit 18 without the image processing circuit 20. It is written on the medium 24.

  An image processing circuit 20 performs image reproduction processing such as image interpolation processing and color conversion processing on the data output from the A / D converter 14 or the data output from the memory control circuit 18, Conversion from RAW data to YUV data.

  Reference numeral 22 denotes a memory built in the imaging apparatus 100, which is used as a work area for image processing, compression / decompression of captured still images and moving images, or used for display images. The memory 22 has a recording capacity sufficient to store a predetermined number of still image data and a predetermined time of moving image data. The memory 22 can also be used as a work area for the system control circuit 50.

  Reference numeral 24 denotes a recording medium such as a memory card or a hard disk for recording compressed image data. The recording medium 24 is configured by a semiconductor memory, a magnetic disk, or the like, and may be built in the imaging apparatus 100 or may be detachable.

  A compression / decompression circuit 26 compresses or decompresses image data by, for example, JPEG compression. The compression / decompression circuit 26 reads image data stored in the recording medium 24, performs compression processing or decompression processing, and writes the processed data to the memory 22.

  A RAW data scaling circuit (magnification circuit A) 28 reads image data output from the A / D converter 14 and written in the memory 22 via the memory control circuit 18 and output from the image sensor 12. RAW data scaling processing is performed while retaining the filter array.

  Reference numeral 29 denotes a magnification circuit for YUV data (magnification circuit B), which reads the image data output from the image processing circuit 20 and written in the memory 22 through the memory control circuit 18 and performs the magnification processing of the YUV data. Do.

  Reference numeral 30 denotes a D / A converter. Reference numeral 32 denotes an image display unit, which is composed of, for example, a TFT LCD. The display image data written in the memory 22 is supplied to the image display unit 32 via the D / A converter 30, thereby displaying an image. An electronic viewfinder function can be realized by sequentially displaying images for imaging using the image display unit 32. The image display unit 32 can perform information necessary for shooting, for example, focus display, camera shake warning display, flash charge display, shutter speed display, aperture value display, exposure correction display, and the like.

  Reference numeral 34 denotes an optical finder. By using the optical finder 34, it is possible to perform shooting without using an electronic finder function using the image display unit 32. Further, in the optical viewfinder 34, elements for displaying various shooting information displayed through the image display unit 32, warning display, and the like are installed.

  A flash 36 has an AF auxiliary light projecting function and a flash light control function. A lens control unit 38 performs focus control, zoom control, aperture value, shutter speed control, and the like of the lens unit 10 in accordance with instructions from the system control circuit 50.

  Reference numeral 40 denotes a mode dial switch, which allows the operator to switch between function modes such as power-off, automatic shooting mode, manual shooting mode, panoramic shooting mode, playback mode, and moving image mode.

  Reference numeral 42 denotes a shutter switch. During the operation of the shutter button 44 (half-press), AF (autofocus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, EF (flash pre-flash) processing, etc. Instruct the start of operation. The shutter switch 42 converts the signal output from the image pickup device 12 into a digital signal by the A / D converter 14 upon completion of the operation of the shutter button 44 (full press, that is, an operator instruction), and performs memory control. Exposure processing stored in the memory 22 via the circuit 18, scaling processing of the RAW data performed by the scaling circuit A28 via the memory control circuit 18, image reproduction processing performed in the image processing circuit 20 via the memory control circuit 18, YUV data scaling processing performed in the scaling circuit B29 via the memory control circuit 18, compression processing performed in the compression / length circuit 26 via the memory control circuit 18, and from the memory 22 to the recording medium 24 via the memory control circuit 18 Instructs the start of a series of processing of recording processing for writing compressed image data.

  46 is a display changeover switch. At the time of shooting, when the display changeover switch 46 is pressed, the system control circuit 50 is instructed to turn on / off the electronic finder function using the image display unit 32. Further, during playback, when the display changeover switch 46 is pressed, the system control circuit 50 is instructed to turn on / off the playback function with information display.

  Reference numeral 48 denotes a zoom lever, which instructs the system control circuit 50 through the system control circuit 50 to instruct the lens unit 10 to perform a zoom operation or electronic zoom magnification.

  Reference numeral 50 denotes a system control circuit that controls the imaging apparatus 100. The system control circuit 50 instructs the processing parameters of the image processing circuit 20 and the compression parameters of the compression / decompression circuit 26, and in accordance with the instructions of the zoom lever 48, the scaling parameters of the scaling circuit A28 and the scaling parameters of the scaling circuit B29. And so on. A memory 52 stores constants, variables, programs, and the like that are referred to when the system control circuit 50 operates.

  Reference numeral 60 denotes a power supply control unit, which includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like. The power supply control unit 60 detects the presence / absence of a battery, the type of battery, and the remaining battery level, and controls the DC-DC converter based on the detection result and an instruction from the system control circuit 50 to obtain a necessary voltage. Supply to each part for a period.

  62 is a connector. A power supply unit 64 includes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a Li battery, an AC adapter, or the like.

  FIG. 2 shows a case where the scaling factor in the RAW data scaling circuit 28 is 1/2 in the horizontal direction and 1/2 in the vertical direction. In order to hold the filter array output from the image sensor 12, the operation in the RAW data scaling circuit 28 is as follows.

  Moreover, since the random noise added as a high frequency component is averaged with respect to the original luminance level by the said calculation, the reduction effect of the random noise by a minimum pixel can be acquired.

  FIG. 3 shows the relationship between the maximum number of pixels output from the sensor and the maximum number of pixels recorded on the recording medium, the relationship between the electronic zoom magnification and the magnification of the RAW data, and the RAW in the second embodiment to be described later. The relationship between the scaling factor of data and the scaling factor of YUV data is shown.

  FIG. 3A shows the number of pixels of the RAW data output from the sensor and the number of pixels of the RAW data cut out at the time of electronic zoom. Here, the sensor having a maximum number of effective pixels of 12 million pixels. Is shown as an example.

  FIG. 3 (b) shows the number of pixels of RAW data recorded on the recording medium, and FIG. 3 (c) shows the number of pixels of JPEG data having the maximum number of pixels recorded on the recording medium. There is an example where the maximum number of pixels is 3 million pixels.

  As described above, the number of pixels necessary for many users is said to be about 3 million pixels. In this embodiment, a sensor having 12 million effective pixels is used and the maximum number of pixels at the time of recording is 300. An explanation will be given by taking the case of 10,000 pixels as an example.

  The relationship between the electronic zoom magnification shown in FIGS. 3A and 3B and the magnification of the RAW data is shown below.

  In the case of enlargement conversion of RAW data, there is a risk of increasing random noise of a specific pixel. Therefore, in the case where the magnification of the RAW data is enlarged, that is, when the electronic zoom magnification is 4.00, the magnification of the RAW data is set to 1/1, and the recording RAW size is the cut-out RAW size (1024 × 768 by electronic zoom). ).

  As a result, even when a sensor having a very large number of images is used, it can be recorded as RAW data having a sufficient number of pixels for the user. Further, an effect of reducing the influence of random noise can be obtained on the low magnification side of the electronic zoom magnification.

  FIG. 4 is a flowchart for explaining image processing / recording processing in the imaging apparatus 100 according to the present embodiment. The system control circuit 50 determines whether or not the RAW data scaling process is necessary according to the electronic zoom magnification designated by the zoom lever 48 (step S101).

  If it is determined in step S101 that the RAW data scaling process is necessary, first, the scaling parameter of the RAW data scaling circuit 28 is set (step S102). Then, the image data acquired via the A / D converter 14 is read from the memory 22 to the RAW data scaling circuit 28 via the memory control circuit 18, and RAW data scaling processing is performed, and then the memory 22. (Step S103), the process proceeds to Step S104. If it is determined in step S101 that RAW data scaling processing is not necessary, the process proceeds to step S104.

  The system control circuit 50 reads the RAW data scaled according to the electronic zoom magnification into the compression / decompression circuit 26 via the memory control circuit 18, and performs reversible such as DPCM conversion and Huffman coding for lossless compression. A compression process is performed and the result is written in the memory 22 (step S104).

  Thereafter, the system control circuit 50 performs a process of writing the compressed data stream written in the memory 22 to the recording medium 24 (step S105).

(Second Embodiment)
Next, a second embodiment will be described. The basic configuration of the imaging apparatus 100 is the same as that described in the first embodiment, and a detailed description thereof is omitted here.

  The relationship between the electronic zoom magnification shown in FIGS. 3A, 3B, and 3C, the RAW data magnification, and the YUV data magnification is shown below.

  In the case of enlargement conversion of RAW data, there is a risk of increasing random noise of a specific pixel. Therefore, in the case where the magnification of the RAW data is enlarged, that is, when the electronic zoom magnification is 4.00, the magnification of the RAW data is set to 1/1, and image reproduction processing such as various interpolation processes and color processing is performed. Then, enlargement conversion of “× 2/1” is performed on the YUV data.

  As a result, even when a sensor having a very large number of pixels is used, it is possible to record as JPEG data having a sufficient number of images necessary for the user. Further, when the electronic zoom magnification is low, an effect of reducing the influence of random noise can be obtained.

  In addition, in the case of using a sensor with 3 million effective pixels, the YUV magnification ratio when the electronic zoom magnification is 4.00 is an enlargement conversion of “× 4/1”, whereas in the present embodiment, Since the enlargement conversion with the YUV variable magnification of “× 2/1” is performed, it is possible to provide the user with an image with a higher resolution.

  FIG. 5 is a flowchart for explaining image processing / recording processing in the imaging apparatus 100 according to the present embodiment. The system control circuit 50 determines whether or not the RAW data scaling process is necessary according to the electronic zoom magnification designated by the zoom lever 48 (step S201).

  If it is determined in step S201 that the RAW data scaling process is necessary, the scaling parameter of the RAW data scaling circuit 28 is first set (step S202). Then, the photographing data acquired via the A / D converter 14 is read from the memory 22 to the RAW data scaling circuit 28 via the memory control circuit 18, and RAW data scaling processing is performed, and then the memory 22. (Step S203), the process proceeds to step S204. If it is determined in step S201 that the RAW data scaling process is not necessary, the process proceeds to step S204.

  Subsequently, the system control circuit 50 sets processing parameters and the like of the image processing circuit 20 according to the recording mode (step S204). Then, the RAW data written in the memory 22 is read into the image processing circuit 20 via the memory control circuit 18, and image reproduction processing such as color conversion processing and interpolation processing is performed in accordance with the processing parameters set in step S204, Data is written to the memory 22 via the memory control circuit 18 (step S205).

  Subsequently, the system control circuit 50 determines whether or not the scaling process of the YUV data is necessary according to the electronic zoom magnification designated by the zoom lever 48 (step S206).

  If it is determined in step S206 that the scaling process of the YUV data is necessary, first, the scaling parameter of the scaling circuit 29 for YUV data is set (step S207). Then, the YUV data, which is the image data that has undergone the desired image reproduction process, is read from the memory 22 to the YUV data scaling circuit 29 via the memory control circuit 18 and the YUV data scaling process is performed. After writing to the memory 22 (step S208), the process proceeds to step S209. If it is determined in step S206 that the YUV data scaling process is not necessary, the process proceeds to step S209.

  Subsequently, the system control circuit 50 reads the image data subjected to the scaling process according to the desired image processing and the electronic zoom magnification into the compression / decompression circuit 26 via the memory control circuit 18 and performs irreversible compression. A lossy compression process such as DCT transform / quantization process and Huffman coding is performed, and the result is written in the memory 22 (step S209).

  Thereafter, the system control circuit 50 performs processing for writing the compressed data stream written in the memory 22 to the recording medium 24 (step S210).

(Third embodiment)
Next, a third embodiment will be described. The third embodiment is an example in which reduction conversion of RAW data is performed according to ISO sensitivity. The basic configuration of the imaging apparatus 100 is the same as that described in the first embodiment, and a detailed description thereof is omitted here.

  The relationship between ISO sensitivity at the time of shooting, RAW data scaling, and maximum recordable image size (JPEG size) is shown below.

  The system control circuit 50 determines the maximum recordable image size according to the ISO sensitivity at the time of shooting instructed by the mode dial 40 or the like, and the RAW data scaling circuit 28 according to the maximum recordable image size. Set the zoom parameter.

  In general, the influence of random noise generated on image data output from an image sensor increases as the ISO sensitivity increases. That is, the random noise reduction effect by the reduction conversion of the RAW data according to the present invention is particularly effective at the time of high-sensitivity shooting, and until the expectation of the random noise reduction effect by the reduction conversion of the RAW data at the time of low-sensitivity shooting. There may be no.

  As a result, when a sensor with a very large number of pixels is used, it is possible to provide image data to the user by converting to an optimal image size for the random noise reduction effect according to the ISO sensitivity at the time of shooting. become.

  An object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus, and the computer (or CPU or MPU) of the system or apparatus stores the storage medium. Needless to say, this can also be achieved by reading and executing the program code stored in.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code itself and the storage medium storing the program code constitute the present invention.

  As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (basic system or operating system) running on the computer based on the instruction of the program code. Needless to say, a case where the functions of the above-described embodiment are realized by performing part or all of the actual processing and the processing is included.

  Further, after the program code read from the storage medium is written to a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. It goes without saying that the CPU or the like provided in the board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are realized by the processing.

1 is a diagram illustrating a configuration of an imaging apparatus 100 according to an embodiment. It is a figure for demonstrating an example of the reduction conversion of RAW data. The relationship between the maximum number of pixels output from the sensor and the maximum number of pixels recorded on the recording medium, the relationship between the electronic zoom magnification and the RAW data scaling factor, and the RAW data scaling factor and the YUV data scaling factor It is a figure for demonstrating a relationship. It is a flowchart for demonstrating the image process and recording process of the imaging device which concerns on 1st implementation. It is a flowchart for demonstrating the image process and recording process of the imaging device which concerns on 2nd implementation.

Explanation of symbols

10: Lens unit 12: Image sensor 14: A / D converter 16: Timing generation circuit 18: Memory control circuit 20: Image processing circuit 22: Memory 24: Recording medium 26: Compression / expansion circuit 28: RAW data scaling Circuit 29: YUV data scaling circuit 30: D / A converter 32: Image display unit 34: Optical finder 36: Flash 38: Lens control 40: Mode dial 42: Shutter switch 44: Shutter button 46: Display changeover switch 48 : Zoom lever 52: Memory 60: Power supply control 62: Connector 64: Power supply unit 100: Imaging device

Claims (8)

Imaging means for photoelectrically converting light from a subject to generate an image signal;
A / D conversion means for A / D converting the image signal output from the imaging means;
Electronic zoom means for obtaining a zoom effect by cutting out part of image data after A / D conversion by the A / D conversion means;
First data conversion for reducing and converting the image data cut out by the electronic zoom means to a predetermined first size regardless of the magnification of the electronic zoom while retaining the filter array of the image data And an imaging device.   The imaging apparatus according to claim 1, wherein the first data conversion unit does not perform conversion when a cut-out size by the electronic zoom unit is equal to or smaller than the first size. Image processing means for performing image reproduction processing on image data via the first data conversion means;
A second data conversion means for converting the image data subjected to the image reproduction process by the image processing means into a predetermined second size;
The imaging apparatus according to claim 1 or 2, wherein the conversion by the second data conversion unit is performed only when the second size is larger than the size of the result by the first data conversion unit. Imaging means for photoelectrically converting light from a subject to generate an image signal;
A / D conversion means for A / D converting the image signal output from the imaging means;
Sensitivity setting means for setting sensitivity at the time of photographing by the imaging means;
Data conversion means for reducing and converting the image data after A / D conversion by the A / D conversion means to a size corresponding to the set sensitivity at the time of photographing while retaining the filter array of the image data An imaging apparatus characterized by that. Imaging means for photoelectrically converting light from a subject to generate an image signal, A / D conversion means for A / D converting an image signal output from the imaging means, and A / D by the A / D conversion means A method for controlling an imaging apparatus including an electronic zoom unit that obtains a zoom effect by cutting out a part of converted image data,
A data conversion procedure for converting the image data cut out by the electronic zoom means to a predetermined size regardless of the magnification of the electronic zoom while maintaining the filter array of the image data. A method for controlling the imaging apparatus. An imaging unit that photoelectrically converts light from a subject to generate an image signal, an A / D conversion unit that A / D converts an image signal output from the imaging unit, and a sensitivity at the time of shooting of the imaging unit are set A method for controlling an imaging apparatus including a sensitivity setting unit,
A data conversion procedure for reducing and converting the image data after A / D conversion by the A / D conversion means into a size corresponding to the set sensitivity at the time of photographing while retaining the filter array of the image data. A control method for an imaging apparatus. Imaging means for photoelectrically converting light from a subject to generate an image signal, A / D conversion means for A / D converting an image signal output from the imaging means, and A / D by the A / D conversion means A computer program for controlling an image pickup apparatus including an electronic zoom unit that obtains a zoom effect by cutting out part of image data after conversion,
The computer executes a data conversion process for reducing and converting the image data cut out by the electronic zoom unit to a predetermined size regardless of the magnification of the electronic zoom while retaining the filter array of the image data. A computer program characterized by the above. An imaging unit that photoelectrically converts light from a subject to generate an image signal, an A / D conversion unit that A / D converts an image signal output from the imaging unit, and a sensitivity at the time of shooting of the imaging unit are set A computer program for controlling an imaging device including sensitivity setting means for
Data conversion processing is executed on the computer for reducing and converting the image data after A / D conversion by the A / D conversion means to a size corresponding to the set sensitivity at the time of photographing while retaining the filter array of the image data A computer program characterized by causing

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