JPWO2002041629A1 - Image file generation device and digital still camera - Google Patents

Abstract

The thumbnail image data and the QVGA image data are generated from the input main image data, and these two reduced image data are stored together with the main image data in a recording medium as one Exif file. By including the QVGA image data having a larger number of pixels than the thumbnail image data in the Exif file, it is possible to output an ultra-high-speed, low-quality image, a high-speed, medium-quality image, and a low-speed, high-quality image. Of the reduced image data to be used as the image for confirmation can be selected by the device that outputs.

Description

Technical field
The present invention relates to a technique for filing, transferring, displaying, and printing image data.
Background art
With the rapid spread of digital still cameras in recent years, there has been a demand for the use of images between devices via removable memory, such as playing back captured images on other digital still cameras or outputting directly to a printer. Is growing. Under such demands, standardization of a file format as a format for recording an image photographed by a digital still camera as digital data in various removable memories has been promoted. At present, an image file format standard for digital still cameras (hereinafter referred to as Exif) is being formulated based on a camera file system standard (Design rule for Camera File system; hereinafter referred to as DCF). For an image file conforming to Exif 2.1, it is recommended that thumbnail image data of 160 × 120 pixels be attached to main image data in order to enable high-speed image display and facilitate image confirmation.
In recent years, mobile phones have rapidly spread, and there is an increasing demand for data communication by mobile phones, such as transmitting image data from a digital still camera to a remote location via the mobile phone.
However, the thumbnail image data of 160 × 120 pixels specified by Exif is suitable for recording and high-speed display because of its small data amount, but the output image is obviously coarse during display and printing. There's a problem.
The technological development of computers is remarkably rapid compared to other fields, the unit price per bit of a recording medium is rapidly decreasing, and the improvement of data processing speed is also remarkable. For this reason, the data amount of the 160 × 120 pixel thumbnail image may be unnecessarily small in the current computer environment.
On the other hand, in data communication using a mobile phone, the communication speed is slower than that of data communication via a wired line, and in view of the fact that billing will be based on the amount of data in the future, file compatibility will be sacrificed. Even so, it seems necessary to transmit only the minimum necessary data.
SUMMARY OF THE INVENTION An object of the present invention is to generate or operate an image file capable of improving the quality of an output image for confirmation in accordance with technological development without impairing the convenience of using images between devices. A file generation device, a digital still camera, and an image file operation program are provided.
Another object of the present invention is to provide a digital still camera capable of transferring image data having a small data size to a communication device.
Disclosure of the invention
The image file generating device according to the first invention generates two reduced image data from the input main image data, and stores the two reduced image data together with the main image data as one file in a recording medium. By including the second reduced image data with a larger number of pixels than the first reduced image data in the file, ultra-high-speed, low-quality image output, high-speed, medium-quality image output, and low-speed, high-quality image output are possible. That is, it is possible to select which reduced image data is to be used as a confirmation image depending on the device that outputs the image. In addition, the first reduced image data is set to a predetermined number of pixels defined by the standard so that the data format can be exchanged between devices, and the second reduced image data is improved in data transfer speed and memory capacity. By using high-speed and high-quality data according to the development, the image quality of the output image for confirmation can be improved without impairing the convenience of using images between devices.
Further, by including the first reduced image data composed of 160 × 120 pixels in the file, by maintaining the compatibility of the file between the devices corresponding to Exif and including the second reduced image data in the file, The image quality of the output image for confirmation can be improved by using the second reduced image data.
Further, by adopting a configuration capable of selecting the number of pixels of the second reduced image data, the image quality of the output image for confirmation can be arbitrarily selected from options prepared in advance.
Furthermore, by adopting a configuration in which the number of pixels of the second reduced image data can be arbitrarily changed, the image quality of the output image for confirmation can be arbitrarily changed.
Further, by including information on the number of pixels of the second reduced image data in the file including the main image data, the first reduced image data, and the second reduced image data, the enlargement / reduction processing according to the number of pixels can be performed when the image data is output. Speed can be increased. In addition, it is possible to easily determine which one of the main image data, the first reduced image data and the second reduced image data should be operated by checking the number of pixels of each image data when operating the image data. .
The digital still camera according to the second aspect of the invention displays the second reduced image data on the display device, so that the captured image can be displayed and confirmed at high speed with high image quality.
Furthermore, by adopting a configuration in which the timing for generating the second reduced image data can be arbitrarily determined, or a configuration in which it is possible to switch whether to generate the second reduced image data immediately after shooting or not. This makes it possible to reduce the amount of processing immediately after image capturing during continuous image capturing to shorten the image capturing interval, or to reduce the overall amount of processing required for file generation, as needed. For example, when generating the second reduced image data from the main image data in the main storage device immediately after shooting and before compressing and storing the main image data in a nonvolatile recording medium that can be exchanged between devices, at least the second reduced image Since the amount of data to be generated increases the processing amount immediately after photographing, the photographing interval at which continuous photographing is possible becomes longer. On the other hand, when the main image data is compressed and stored in the non-volatile recording medium, the main image data is expanded and called in the main storage device, and when the second reduced image data is generated from the main image data, continuous shooting is possible. Although the photographing interval can be shortened, the amount of data processing increases as a whole, so that the power consumption increases and the number of photographable images decreases. As described above, the timing at which the second reduced image data is generated has advantages and disadvantages. Therefore, a configuration may be adopted in which the photographer can determine the timing for generating the second reduced image data as needed.
The digital still camera according to the third aspect of the present invention provides a method for selecting main image data or reduced image data from a file and transferring the selected image data to a communication device. Image data can be transferred to another communication device through a line in a short time.
The digital still camera according to the fourth invention generates reduced image data having a smaller number of pixels than the image data from the image data, and transmits the reduced image data to the communication device. Image data can be transferred to another communication device via the electric communication line in a shorter time than when the image data is transferred via the electric communication line.
Further, by generating the reduced image data before the start of the communication, the time from the start of the communication to the completion of the transmission of the reduced image data can be reduced as compared with the case of generating the reduced image data after the start of the communication.
An image processing program according to a fifth aspect of the present invention provides an output image by selecting and printing or displaying second reduced image data having the second largest number of pixels from an image file having three image data having different numbers of pixels. Image quality can be improved.
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a plurality of examples showing the embodiment of the present invention will be described.
(First embodiment)
FIG. 2 shows a digital still camera 1 as a first embodiment of the image file generating apparatus according to the present invention. The “means for inputting main image data” described in the claims mainly includes an optical system 11, an area sensor 12, an AFE (Analog Front End) 13, an image generation unit 14, and a color space conversion unit 15. You. The “first image data generation unit” and the “second image data generation unit” described in the claims are mainly configured by the control unit 19. The “file unit” described in the claims mainly includes a control unit 19, a compression processing unit 16, and a file unit 17. The “recording medium” described in the claims is constituted by the removable memory 18. The “display means” described in the claims mainly includes the control unit 19 and the display unit 22. The “activation unit” and the “switching unit” described in the claims are mainly configured by the operation unit 21.
The optical system 11 includes an optical lens, an infrared cut filter, an optical low-pass filter, and the like, and forms a subject as an input image on the area sensor 12.
The area sensor 12 is an optical sensor such as a CCD sensor or a CMOS sensor having a photoelectric conversion element group, and each of the photoelectric conversion elements is any one of C (Cyan), M (Magenta), Y (Yellow), and G (Green). Such a complementary color filter is provided. Each photoelectric conversion element is arranged in a matrix. The reason for obtaining the G color information in addition to the CMY color information is to improve the image quality by capturing the G color information that is visually perceived as raw information. In the following description, it is assumed that an area sensor in which each of the photoelectric conversion elements is provided with one of C, M, Y, and G complementary color filters is used. Complementary color filters or RGB (Red, Green, Blue) primary color filters may be used. An analog signal of each color output from the area sensor 12 is input to the AFE 12.
The AFE 13 includes a program gain amplifier, a CDS circuit, an A / D converter, and the like, and samples an analog signal output from each photoelectric conversion element to generate digital data of 10 to 12 bits for each color of CMYG. Each digital data of CMYG is input to the image generation unit 14 directly or after being stored in the buffer memory.
The image generation unit 14 is configured by a hardware method by controlling an ASIC in which a predetermined algorithm is implemented by a logic circuit by the control unit 19, or is configured by a software method using a DSP (Digital Signal Processor) engine. You. When an ASIC is used for the image generation unit 14, there is a merit that the processing can be performed at a higher speed than when the image generation unit 14 is configured by a software method. The image generation unit 14 includes an automatic exposure process (AE: Auto Exposure), an automatic white balance process (AWB: Auto White Balance), an image generation process, a conversion process from a CMYG color space to an RGB color space, a γ correction process, and the like. I do. The image generation processing referred to here mainly generates image data having four values of each color of CMYG for each pixel using digital data representing one of CMYG intensities corresponding to the output of each photoelectric conversion element. Processing. The conversion process from the CMYG color space to the RGB color space is performed by a hardware method using a 4 × 3 matrix operation processing circuit or a software method using a CPU using a multiplication circuit and an addition / subtraction circuit.
The color space conversion unit 15 is configured by a 3 × 3 matrix operation processing circuit, or is configured by a software method in the CPU 30 or the like using a multiplication circuit and an addition / subtraction circuit, and performs RGB digital conversion by linear conversion using a 3 × 3 matrix. Digital pixel data of YCbCr is generated from the pixel data. In order to compress and record in the removable memory 18 in the JPEG file format, the color space conversion unit 15 needs to output YCbCr digital pixel data rounded to 8 bits. For color space conversion, ITU-RBT. 601 using the following equation,
Y = 0.299R +. 0587G + 0.114B
Cb = (− 0.299R−0.587G + 0.886B) × 0.564 + offset
Cr = (0.701R−0.587G−0.114B) × 0.713 + offset
For example,
Y = 0.2990R +. 05870G + 0.1140B
Cb = -0.1687R-0.3313G + 0.5000B + 128
Cr = 0.5000R-0.4187G-0.0813B + 128
Can be used.
The compression processing unit 16 is generally constituted by a dedicated chip for JPEG compression processing by a hardware method, but can also be constituted by a software method using a DSP. The compression processing unit 16 performs JPEG compression by discrete cosine transform (DCT) and Huffman coding. Note that the compression processing unit 16 may be provided with a function of expanding a JPEG file so that the recorded image data can be quickly checked on the display unit 22.
The file unit 17 records the JPEG-compressed image data in a removable memory 18 such as a compact flash memory in an Exif file format.
The control unit 19 is a microcomputer including a CPU 30, a ROM 31, a RAM 32, and the like. The control unit 19 executes the control program stored in the ROM 31 with the CPU 30, thereby controlling the optical system 11, the area sensor 12, the AFE 13, the image generation unit 14, the color space conversion unit 15, the compression processing unit 16, the file unit 17, and the like. Of the main image data composed of the YCbCr pixel data generated by the color space conversion unit 15, and the thumbnail image data of 160 × 120 pixels and the QVGA image of 320 × 240 pixels are stored in the RAM 32. Generate data. The RAM 32 temporarily stores main image data composed of YCbCr pixel data generated by the image generation unit 14, its reduced image data, a control program, and the like. The thumbnail image data corresponds to the first reduced image data described in the claims, and the QVGA image data corresponds to the second reduced image data described in the claims. The various processes performed by the image generation unit 14, the color space conversion unit 15, and the compression processing unit 16 may be executed by a software method by causing the CPU 30 to execute a predetermined program.
When the reduced image data different from the thumbnail image data is generated as the second reduced image data, the number of pixels of the reduced image data is fixed to 320 × 240 pixels here. May be input, and reduced image data of the input number of pixels may be generated. When QVGA is adopted as the size of the second reduced image data, the second reduced image data can be checked while taking advantage of the 160 × 120 pixel thumbnail image data that the image data expansion time is short and the work memory can be small. This is image data that can be printed with a sufficiently high image quality as an image for use.
Immediately after shooting, thumbnail image data is generated from the main image data composed of the YCbCr pixel data generated by the color space conversion unit 15, and the main image data and the thumbnail image data are generated without generating the QVGA image data. The JPEG compression process is performed, and the Exif file is recorded in the removable memory 18 without including the QVGA image data. Then, the main image data is called from the removable memory 18 in response to a user request, and the QVGA image data is converted from the main image data. May be generated. In this case, the user's request is accepted by an input using a key provided in the operation unit 21 as an “activation unit” described in the claims. Whether or not to generate QVGA image data immediately after shooting is set by the user by inputting with a key provided on the operation unit 21 as "switching means" described in the claims. When QVGA image data is generated immediately after shooting, the amount of processing for generating QVGA image data can be reduced. When calling main image data from the removable memory 18 in response to a user request and generating QVGA image data from the main image data, the continuous shooting interval can be shortened by reducing the processing amount immediately after shooting. Since the main image data is compressed and recorded in the removable memory 18, when the QVGA image data is generated from the main image data once recorded in the removable memory 18, a separate decoding process is required.
The display unit 22 as a display device described in the claims includes a video memory, an LCD (Liquid Crystal Display), and the like, and includes 320 × 240 pixel reduced image data (hereinafter, referred to as “reduced image data”) of the image data reduced by the CPU 30. QVGA image data) is displayed on the LCD. Note that thumbnail image data of 160 × 120 pixels may be displayed on the LCD. The QVGA image data or the thumbnail image data is read from the removable memory 18, expanded, and displayed on a screen such as an LCD. When displaying QVGA image data on the LCD, the display speed is higher than when displaying main image data, and the image quality is improved as compared with displaying thumbnail image data.
The operation unit 21 includes various setting switches, a power switch, a shutter button, and the like provided around the LCD.
The two reduced image data generated in the RAM 32 by the CPU 30 are each subjected to a compression process by the JPEG method together with the main image data, and are recorded as a file having a data structure conforming to Exif together with predetermined additional information. Hereinafter, the structure of this file will be described with reference to FIG. The abbreviations used in the figures are the abbreviations used in the digital still camera image file format standard issued by the Japan Electronic Industry Development Association. Further, the main image data, the thumbnail image data, and their attached information only need to be recorded in a format conforming to Exif 2.1, and thus the description is omitted.
The compressed QVGA image data and its accompanying information (hereinafter, the compressed QVGA image data and its accompanying information are referred to as QVGA data) are compressed thumbnails in the first thumbnail data segment of APP1 (application marker segment 1). It is stored in a segment (QVGA data) following the image data and its attached information. The additional information referred to here is additional information necessary for decoding processing such as a quantization table and a Huffman table.
Ancillary information on the QVGA data (hereinafter referred to as QVGA header) is stored in a Maker note segment in the Exif IFD in the 0th IFD in the APP1 (application marker segment 1). The QVGA header includes a segment (QVGA = On / Off) indicating whether or not the file contains QVGA data, a data size and tag of the QVGA data, a pixel size of the QVGA image data, an offset to the QVGA image data, and QVGA. It is composed of a segment (QVGA) representing the data length of the image data. Note that the data of the QVGA header may be recorded in the Exif IFD, which is one layer above the make note. In this case, a dedicated tag is recorded in the Exif IFD segment, and data of the QVGA header is recorded following the dedicated tag.
When reading the Exif file recorded in this way, it is possible to know whether or not the QVGA image data is included in the Exif file by checking the value of the QVGA = On / Off segment, and check the value of the QVGA segment. Thus, it is only necessary to access the QVGA data segment and read the QVGA data. When accessing the QVGA data segment from the QVGA segment, the head of the QVGA data segment can be directly accessed from the position of the offset data using the offset data.
According to the digital still camera 1 of the first embodiment, by inserting QVGA image data of 320 × 240 pixels in a predetermined position of an Exif file in addition to thumbnail image data of 160 × 120 pixels, an image can be exchanged between devices supporting Exif. Can be improved without deteriorating the convenience of using each other. Further, the size of the QVGA image data of 320 × 240 pixels is optimal for displaying on a liquid crystal screen of a mobile phone.
The present invention can be applied to any image processing apparatus that records an image file on a recording medium in the format described above, in addition to a digital still camera. For example, in a computer that executes a photo retouching application, a procedure for recording image data in the format described above can be incorporated in the photo retouching application.
Further, in the first embodiment, the function of the “means for inputting main image data” described in the claims includes the optical system 11, the area sensor 12, the AFE (Analog Front End) 13, the image generating unit 14, Although the function of the color space conversion unit 15 has been described, for example, when the image file generation device is realized as a personal computer, the function of an input / output device that reads and writes a removable memory for exchanging data between a digital camera and a personal computer is described. The function of “means for inputting main image data” may be realized.
(Second embodiment)
FIG. 3 shows a digital still camera 2 with a BlueTooth interface as a second embodiment of the image file generating apparatus according to the present invention. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof will be omitted. The connection means described in the claims is constituted by a BlueTooth interface (BTIF) 23. The transfer means described in the claims is mainly configured by the control unit 19.
The BTIF 23 includes a D / A converter, an oscillation circuit, a modulation circuit, an antenna, and the like, and enables data communication between the digital still camera 2 and a mobile phone remote from the digital still camera 2 using short-range wireless communication. I do. The control unit 19 notifies the BTIF 23 of information necessary for receiving data transmitted from the digital still camera 2 at the transfer destination mobile phone. The information required by the transfer destination mobile phone is recorded in advance in a flash memory or the like (not shown) by the user using the operation unit 21. The BTIF 23 performs D / A conversion on the data transferred to the BTIF 23 and transfers the data to a mobile phone on a predetermined carrier.
The CPU 30 executes a data transfer program stored in an auxiliary storage device such as a flash memory (not shown), and generates QVGA image data generated from part or all of the Exif file recorded in the removable memory 18 or main image data of the Exif file. To the BTIF 23. What kind of data is transmitted through the BTIF 23 is selected by the user.
The system constituted by the CPU 30 executing the data transfer program causes the display unit 22 to display the choices of the transmission data, and waits for a user input from the operation unit 21. The choices of the transmission data include those for transmitting the entire Exif file, those for extracting and transmitting the main image data and the accompanying information from the Exif file, those for extracting the QVGA image data and the accompanying information from the Exif file, and those for transmitting the Exif file. It is provided with a device for extracting thumbnail image data and its associated information from a file and transmitting the extracted image data. By selecting main image data, thumbnail image data, or QVGA image data from the Exif file and transferring a part of the Exif file, compared to transferring the entire Exif file, the mobile phone can transmit to the other communication device in a shorter time. Images can be transferred.
When the user operates the operation unit 21 to select one of the options, the option is notified to the control unit 19. The control unit 19 specifies or generates necessary data according to the options, and transfers the data to the BTIF 23. For example, when the option of extracting the QVGA image data and the accompanying information from the Exif file and transmitting the extracted data is selected, the top of the Exif file to be transmitted using the data representing the volume content of the removable memory 18 stored in the RAM 32 is selected. The address is specified, and the data of the removable memory 18 is read from the head address, and the value of the QVGA = On / Off segment is checked. If QVGA = On / Off segment value indicates that QVGA data is recorded, QVGA data is read from the QVGA data segment, and the QVGA data is transferred to the BTIF 23. If the value of the QVGA = On / Off segment is a value indicating that no QVGA data is recorded, an error message is displayed, or the main image data is read from the Image data segment, and the main image data is reduced. The QVGA image data is generated, and the QVGA image data and its attached information (QVGA data) are transferred to the BTIF 23. When the main image data is read from the Image data segment and the main image data is reduced to generate QVGA image data, the main image data is compressed and recorded in the removable memory 18, so that the main image data must be expanded. is there.
When transferring data to a device distant from the BTIF 23, the data is not only transferred to the mobile phone 4 (see FIG. 4) set in advance as a communication destination, but also transferred to a remote location through the mobile phone communication network using the mobile phone 4 as a node. It is also possible to transfer to the telephone 3 or to the remote computer 5 through the Internet. When data is transferred to a remote terminal through a wide area communication network, a configuration is adopted in which address information of the remote terminal can be input by the operation unit 21, and the digital still camera 2 directly specifies a transfer destination and transfers data. Alternatively, data can be temporarily transferred to the mobile phone 3 and then transferred to another terminal using the Internet mail function of the mobile phone 3 or the like. When the transfer destination is directly specified by the digital still camera 2 and data is transferred to a remote terminal during communication with the mobile phone 4, it is desirable to generate data to be transferred before starting communication. For example, if the QVGA data to be transferred is generated after the start of the communication, the time required from the start of the communication to the completion of the data transfer becomes long, which causes an increase in the communication cost.
The interface between the digital still camera 2 and the mobile phone 4 is not limited to BlueTooth, but may be, for example, a cable connection.
According to the digital still camera 2, since a part of the Exif file can be extracted, image data having a small data size can be transferred to the mobile phone.
(Third embodiment)
Next, an image processing program according to a third embodiment of the present invention will be described. The image processing program according to the third embodiment is recorded on, for example, a personal computer 5 shown in FIG. This image processing program extracts QVGA image data from a plurality of Exif files recorded in a predetermined volume, displays the list on a display or prints a list, and checks what image data is recorded in the volume. Program.
The procedure for extracting the QVGA image data from the Exif file is as follows. By checking the value of the QVGA = On / Off segment shown in FIG. 1, it is checked whether the QVGA data is included in the Exif file, and by checking the value of the QVGA segment, the QVGA data segment is accessed and the QVGA data is read. . When accessing the QVGA data segment from the QVGA segment, the head of the QVGA data segment is directly accessed from the position of the offset data using the offset data. The QVGA image data is expanded using the attached information and output to a display or a printer.
According to the third embodiment of the present invention, the image is displayed and printed based on the QVGA image data having a larger number of pixels than the thumbnail image data, so that the image quality of the output image for confirmation can be improved.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a file structure of a digital still camera according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a digital still camera according to a first embodiment of the present invention.
FIG. 3 is a block diagram showing a digital still camera according to a second embodiment of the present invention.
FIG. 4 is a schematic diagram for explaining the operation of the digital still camera according to the second embodiment of the present invention.

Claims (14)

Means for inputting main image data;
First image data generating means for generating first reduced image data of a predetermined number of pixels smaller than the number of pixels of the main image data from the main image data,
A second image data generation unit that generates second reduced image data having a number of pixels smaller than the number of pixels of the main image data and larger than the number of pixels of the first reduced image data from the main image data,
File means for storing the main image data, the first reduced image data and the second reduced image data in a recording medium as one file which can be read individually;
An image file generation device comprising: 2. The image file generating apparatus according to claim 1, wherein said first image data generating means generates said first reduced image data composed of 160 × 120 pixels. The second image data generating means includes means for allowing a user to select the number of pixels, and means for generating the second reduced image data having the number of pixels selected by the user from the input image data. The image file generation device according to claim 1. The second image data generating means includes means for allowing a user to input an arbitrary number of pixels, and means for generating the second reduced image data having the number of pixels input by the user from the input image data. 3. The image file generation device according to claim 1, wherein: 5. The file including the main image data, the first reduced image data, and the second reduced image data, the file including information on the number of pixels of the second reduced image data. The image file generation device according to any one of claims 1 to 4. An image file generation device according to any one of claims 1 to 5,
A display device;
Means for displaying the second reduced image data on the display device,
A digital still camera comprising: Activating means for causing the second image data generating means to generate the second reduced image data,
The digital still camera according to claim 6, further comprising: 7. The digital still camera according to claim 6, further comprising: means for switching whether or not to cause the second image data generating means to generate the second reduced image data immediately after photographing. Image data generating means for generating, from the input image, main image data and reduced image data having a smaller number of pixels than the number of pixels of the main image,
File means for storing the main image data and the reduced image data as one file in a recording medium;
Connection means capable of communicating with a communication device connected to the telecommunication line,
Transfer means for selecting the main image data or the reduced image data from a file recorded on the recording medium and transferring the selected image data to the communication device through the connection means;
A digital still camera comprising: Image data generating means for generating image data from an input image;
File means for storing the image data in a recording medium,
Reduced image data generating means for generating reduced image data having a smaller number of pixels than the number of pixels of the image data from the image data stored in the recording medium,
Connection means capable of communicating with a communication device connected to the telecommunication line,
Transfer means for transferring the reduced image data to the communication device through the connection means,
A digital still camera comprising: 11. The digital still camera according to claim 10, wherein the reduced image data generating unit generates the reduced image data before the communication device starts communication. Three pieces of image data including main image data, first reduced image data, and second reduced image data having different numbers of pixels in one image, and include main image data, second reduced image data, and first reduced image data; Selecting the second reduced image data from an image file having three image data in which the number of pixels is sequentially reduced;
Causing the printer to print the second reduced image data,
Image processing program that causes a computer to execute the processing. 13. The image processing program according to claim 12, causing a computer to execute a procedure for displaying the second reduced image data on a display device. A computer-readable recording medium on which the image processing program according to claim 12 is recorded.

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