JP2007174039A - Image output device, image output method, and image output program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniformly finish actual printing using image data obtained under the same photographing environment. <P>SOLUTION: Index images are prepared by using captured image data. Images to be subjected to digital development processing under the same processing conditions are selected from the index images. When the images are selected, the image data based on any image in the selected images are read out so as to execute the image processing on the image data on the basis of a plurality of the processing conditions in which any item in image processing items is changed step by step. When the processing conditions during the actual printing are selected from parameter index images prepared by using the images subjected to the image processing, digital image processing using the processing conditions is executed on all of the images selected from the index images. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image output apparatus and an image output method for performing image processing on, for example, acquired image data and outputting the image to a display device such as a print output using the image data after image processing. And an image output program.

  Image data taken by an imaging device such as a digital still camera is converted into digital data from an analog imaging signal output from an imaging device such as a CCD image sensor or a CMOS image sensor, and stored in a storage medium. A standard format for storing the image data in the storage medium is a format (for example, EXIF format) in which image processing is performed on the imaging signal and data compression processing is performed in the JPEG format. For example, a format for storing raw image data without performing image processing (hereinafter referred to as a RAW format) is known, and a digital still camera that can store captured image data in the RAW format has become widespread. (For example, refer to Patent Document 1).

  Since the image sensor can only detect brightness, by applying R, G, and B filters to the image sensor, an image signal is extracted as color information of three colors R, G, and B. The color information of each color of R, G, B is called raw image data (hereinafter referred to as RAW data). The digital still camera incorporates an image processor that performs so-called digital development processing, which develops the RAW data by performing various image processing such as color conversion processing, white balance processing, and exposure processing. In the EXIF format, such digital development processing is performed on the RAW data and the digitally developed image data is saved. On the other hand, in the RAW format, the image data is saved as the RAW data.

  Parameters for determining processing conditions for the various image processing items are set in advance in an image processing processor built in the digital still camera. These parameters influence the finish of the image. When digital development processing is performed by the image processor, the finished image finish is directed to some extent, and image data that has been subjected to digital development processing once is processed. Even if image correction processing is performed, it is difficult to greatly change the finish. Among camera users, there are many users who want to finish an image to their liking regardless of digital development processing unique to a digital still camera, and the RAW format is supported by such users.

Patent Document 1 describes a print system that performs printing based on RAW data. In this print system, digital development processing is performed on a single frame of RAW data with a plurality of parameters that determine processing conditions for each image processing item, and a plurality of reference images with different parameters are displayed as reduced images. The user can specify desired parameters by selecting a desired reference image from a plurality of displayed reference images. Such parameter designation is performed for each image processing item so that a user-finished image can be easily obtained.
JP 2002-330388 A

  However, in the case of the above-described method, it is effective when digital development processing is performed on one image data. However, when digital development processing is performed on a plurality of image data, the above-described processing is applied to image data. Since this is performed every time, it takes a lot of time to complete the print, and there is a disadvantage that the work load on the operator is increased. In addition, if a parameter that is an optimal image processing condition is selected for each of a plurality of image data, different parameters may be obtained even in a plurality of image data obtained in the same shooting environment such as indoor shooting. May be selected, and there is a problem in that the finish of the actual print varies.

  According to the present invention, when RAW data is printed, the finish of the main print obtained from the image data obtained under the same shooting environment can be made uniform, and the burden on the operator when specifying parameters can be reduced. The purpose is to do so.

  The image output device of the present invention is an image output device that performs image output using image data, an image capturing unit that captures a plurality of raw image data that has been photographed by an imaging device and stored without being subjected to digital development processing, Basic data selection means for selecting basic image data from raw image data captured by the image capturing means, and a plurality of basic image data selected by the basic data selection means for the plurality of digital development processes A first image processing means for creating a reference index image by arranging a plurality of reference images obtained by performing image processing under a plurality of different processing conditions for image processing items in one screen, and the image capturing means Selected from the reference index image for a plurality of captured raw image data And second image processing means for performing digital development processing using the physical condition, further comprising a characterized.

  In addition, a basic image obtained by performing image processing based on supplementary information attached to the raw image data on each of a plurality of raw image data and performing image processing based on the supplementary information is used. And a third image processing means for creating a basic index image.

  Further, the image selection means for selecting a basic image to be subjected to uniform image processing from the basic index image, and raw image data based on a plurality of basic images selected by the image selection means are subjected to the same image processing. Image classification means for classifying as an image data group to be applied is provided, and the basic data selection means selects basic image data from the image data group classified by the image classification means.

  Further, the image obtained from the image data classified as the image data group is an image in which the person as the subject image is the same person.

  In addition, the image obtained from the image data classified as the image data group is an image in which the time zone captured by the imaging device is the same time zone.

  Further, the image obtained from the image data classified as the image data group is an image in which the place taken by the imaging device is the same place.

  The image processing items include at least two of exposure adjustment, white balance adjustment, and color adjustment.

  The display device may further include display means for displaying the basic index image and the reference index image.

  Further, the printing apparatus includes a print output unit that prints out the basic index image and the reference index image.

  Further, as an image output method of the present invention, in the image output method for outputting an image using image data, a step of taking in a plurality of raw image data captured by an imaging device and stored without being subjected to digital development processing; A step of selecting basic image data from the captured raw image data, and image processing with respect to the selected basic image data under a plurality of different processing conditions for a plurality of image processing items included in the digital development processing A step of arranging a plurality of reference images obtained by applying a reference image in one screen to create a reference index image, and processing conditions selected from the reference index image for a plurality of captured raw image data And a step of performing a digital development process using.

  The image output program of the present invention selects basic image data from image reading means for capturing a plurality of raw image data captured by an imaging apparatus and stored without being subjected to digital development processing, and the captured raw image data A plurality of reference images obtained by subjecting the selected basic image data to image processing under a plurality of different processing conditions for a plurality of image processing items included in the digital development processing. A first image processing unit configured to create a reference index image arranged in one screen, and a digital development process using a plurality of captured raw image data using processing conditions selected from the reference index image The computer is caused to function as second image processing means for performing the above.

  According to the image output device of the present invention, in the image output device that performs image output using the image data, the image capturing unit that captures a plurality of raw image data that has been photographed by the imaging device and stored without being subjected to digital development processing, and , Basic data selection means for selecting basic image data from raw image data captured by the image capturing means, and basic image data selected by the basic data selection means are included in the digital development processing. A first image processing means for creating a reference index image by arranging a plurality of reference images obtained by performing image processing under a plurality of different processing conditions for a plurality of image processing items in one screen; Select from the reference index image for a plurality of raw image data captured by the means And a second image processing means for performing digital development processing using the processed processing conditions. When printing raw image data that has not been subjected to image processing such as RAW data, for example, the same shooting environment is used. By making the processing conditions for the image data obtained below the same, it is possible to suppress variations in the finish of the actual print.

  In addition, a basic image obtained by performing image processing based on supplementary information attached to the raw image data on each of a plurality of raw image data and performing image processing based on the supplementary information is used. Since the third image processing means for creating the basic index image is provided, the customer who requests the print service selects the image to be processed under the same processing conditions by creating the basic index image. be able to.

  Further, the image selection means for selecting a basic image to be subjected to uniform image processing from the basic index image, and raw image data based on a plurality of basic images selected by the image selection means are subjected to the same image processing. An image classification unit for classifying the image data as a group to be applied, and the basic data selection unit selects basic image data from the image data group classified by the image classification unit; This is unnecessary, and the time required for image processing can be reduced.

  Further, since the image obtained from the image data classified as the image data group is an image in which the person who is the subject image is the same person, the image data in which the same person is the subject image is collected under the same processing conditions. Since the image is processed, it is possible to make the color of the subject image in the image processed image the same color.

  In addition, since the image obtained from the image data classified as the image data group is an image in which the time zone imaged by the imaging device is the same time zone, images captured in the same time zone are processed under the same processing conditions. Therefore, the color of the subject image in the image processed image can be made the same color.

  In addition, since the image obtained from the image data classified as the image data group is an image where the location captured by the imaging device is the same location, the image captured at the same location is subjected to image processing under the same processing conditions. As a result, the color of the subject image in the image processed image can be made the same color.

  As shown in FIG. 1, a print order receiving apparatus 10 that functions as an image output apparatus receives a print order for a frame image that has been captured by a digital still camera and recorded as digital image data. The print order receiving apparatus 10 is installed, for example, in a print service store 11 that provides a photo print service, and is operated by an operator. The image data is stored in a storage medium such as a memory card 13 and is brought into the print service store 11 by the customer 12. The print order receiving apparatus 10 supports not only image data stored in the EXIF format but also print orders of RAW data stored in the RAW format.

  When the RAW data print order is received, the index print 16 using the image data read by the print order receiving apparatus 10 is created and provided to the customer 12. The customer 12 selects from the provided index print 16 an image to be digitally developed under the same processing conditions and an image for creating a parameter index print. When these selections are executed, a parameter index print 17 is created and provided to the customer 12.

  The parameter index print creates an index image in which a plurality of reference images developed with different parameters are arranged on one screen so that the customer 12 can easily specify digital development processing parameters to be applied to the RAW data. This is printed on recording paper and is also called round print. Each reference image is developed by changing parameters, and the customer 12 can find a desired finish through these reference images. Thereafter, when a parameter close to the finish desired by the customer 12 is designated from the parameter index print, the digital development process using the designated parameter is performed on an image to be subjected to the digital development process under the same processing conditions. After being printed, the print 18 is created and provided to the customer 12.

  The print order receiving apparatus 10 includes a system controller 21, a card reader 22, an image processing unit 23, a data storage device 24, a network interface 26, a console 27, a recording media drive 32, and a photo printer 33. The console 27 includes a display 28 and an operation unit 29.

  The system controller 21 includes a CPU, a ROM, a RAM, and the like, and comprehensively controls each unit of the print order receiving apparatus 10 based on an instruction from the operation unit 29. The system controller 21 reads the RAW data stored in the data storage device 24 when the index image or the parameter index image is created, and transfers the read RAW data to the image processing unit 23. Further, when the system controller 21 is instructed as an image for executing digital development processing under the same processing conditions from the index image displayed on the display 28 by the operation of the operation unit 29, the system controller 21 becomes a basis of the instructed image. Information indicating that it is image data of a group subjected to the same processing is added to the RAW data. Thereby, RAW data to which information indicating that the image data is a group subjected to digital development processing under the same conditions and other RAW data can be grouped (classified).

  The operation unit 29 is an input device that includes a mouse, a keyboard, and the like and inputs operation commands to the system controller 21. On the other hand, the display 28 displays an operation screen and a captured image. In addition, you may use the touchscreen type display which combines an operation part and a display. The card reader 22 accesses the memory card 13 and reads image data stored in the EXIF format or the RAW format.

  The image processing unit 23 creates the above-described index image or parameter index image based on the read RAW data. The image processing unit 23 includes a format conversion unit 35, a development condition setting unit 36, a digital development processing unit 37, and an index image creation unit 38. The RAW format has different file formats because the file format is not uniform among camera manufacturers as in the EXIF format. The format conversion unit 35 converts these various file formats into predetermined file formats, and delivers the converted RAW data to the digital development processing unit 37. In this way, by providing the format conversion unit 35, for example, when the existing file format is changed or a new file format is added, the digital development processing unit 37 can be flexibly handled without being changed. Is possible.

  The development condition setting unit 36 is provided for setting processing conditions in digital development processing. The digital development processing includes processing such as white balance (hereinafter referred to as WB) adjustment, exposure adjustment, and tint adjustment, and the development condition setting unit 36 sets parameters in these image processing items. For example, when creating an index image, the development condition setting unit 36 sets processing conditions for the corresponding RAW data using the accompanying information attached to the RAW data. This supplementary information is composed of a spectral sensitivity value of a CCD image sensor built in the digital still camera, in addition to settings (white balance, exposure, etc.) at the time of shooting. Further, when creating the parameter index image, the development condition setting unit 36 uses the image processing condition obtained from the accompanying information attached to the RAW data that is the basis of the basic image that creates the parameter index print as a reference. Thus, among the plurality of image processing items included in the above-described digital development processing, a plurality of processing conditions are set in which the parameter of at least one image processing item is changed stepwise. Further, when performing the actual printing, the processing conditions designated from the parameter index printing are set as the processing conditions for performing the digital development processing for each of the grouped RAW data.

  The digital development processing unit 39 executes digital development processing on the RAW data based on the processing conditions set by the development processing setting unit 38. The image data that has been subjected to image processing by this digital development processing is stored in the image data storage area 43 of the data storage device 24.

  The index image creation unit 38 performs resize processing on the image based on the image data developed by the digital development processing unit 37 to reduce the image size, and arranges a plurality of reduced target images on one screen. An index image or a parameter index image is created.

  The data storage device 24 is, for example, a hard disk drive, stores an operating system and various programs, and is used to store image data captured by the card reader 22. Further, the data storage device 24 is set with a parameter storage area 42 for storing the parameter data referred to by the image processing unit 23 and an image data storage area 43 for storing a reference image before the resizing process is executed. Yes.

  The network interface 26 is a communication interface for connecting to the photographic printer 33 that creates the main print 17 so that data communication is possible, and the index image data and finally selected parameters are used via the network interface 26. Thus, the image data subjected to the digital development processing is transferred.

  The recording media drive 32 accesses a data recording medium such as a CD (compact disc) and writes image data. The print service store 11 provides a service for writing image data to a recording medium in addition to the print service. The recordable media drive 32 is used to perform such a service. The recordable media drive 32 writes designated image data on the record medium to create a so-called photo CD.

  The photographic printer 33 forms a latent image by irradiating a photographic paper with laser light based on image data designated for printing, and then performs development processing to output a high-definition photographic print. The photo printer 33 is transferred with the index image data generated by the image processing unit 23 and the image data digitally developed using the finally selected parameters, and the transferred image data is used. An index print 16, a parameter index print 17, and a main print 18 are created. It should be noted that the parameter index print 17 and the main print 18 are created by the photographic printer 33, so that the difference in color density between the image of the parameter index print 17 and the image of the main print 18 can be eliminated. The difference in color density between the image selected on the print 17 and the image on the main print 18 can be eliminated. In this embodiment, the parameter index print or the main print is created in the photo printer. For example, an index printer is provided separately from the photo printer, and the index printer performs color matching processing and the like. Thereafter, an index print and a parameter index print may be created.

  FIG. 2 shows an example of index printing. The index print 16 is obtained by arranging a plurality of images (hereinafter referred to as basic images) 45 subjected to digital development processing under processing conditions based on incidental information attached to RAW data and then subjected to resizing processing in a matrix. is there. 2 shows an example in which a plurality of basic images 45 are arranged in a matrix of 4 rows and 5 columns. From the plurality of basic images 45 in the index print 16, the customer 12 selects a basic image 45 to be developed under the same processing conditions. When the customer 12 selects the basic image 45 to be digitally developed under the same processing conditions, the operator refers to the index image displayed on the display 28 and designates the basic image 45 selected by the customer 12. When a basic image 45 to be subjected to digital development processing under the same processing conditions is selected, digital development processing is performed under the same processing conditions for each of the RAW data that is the basis of the selected basic image 45. Is added. The basic image selected to be subjected to the digital development processing under the same processing conditions is, for example, an image in which the subject image of the basic image is the same person, a time zone when image data based on the basic image is obtained, that is, Either an image that is taken by the digital camera, etc., in the same time zone, or an image that is based on the basic image, that is, an image that is taken by the digital camera, etc. It is.

  FIG. 3 shows an example of the parameter index print 17. The parameter index print 17 includes a plurality of images (hereinafter, referred to as “image exposure” and “white balance (hereinafter referred to as“ WB ”)”, which are obtained by changing the parameters of two items, ie, exposure adjustment and white balance (hereinafter referred to as “WB”) adjustment. 46) (referred to as a reference image). For example, each reference image 46 is arranged in a matrix of 6 rows and 7 columns, with exposure parameters for exposure adjustment set on the vertical axis and a plurality of different light source parameters serving as parameters for white balance adjustment set on the horizontal axis. The In this embodiment, an example of image processing items for exposure adjustment and WB adjustment is shown. However, the present invention is not limited to this, and parameters for other image processing items such as color adjustment are changed stepwise. It is also possible to set the processing conditions.

  For example, the exposure parameter is changed by 1/2 EV in the plus direction and the minus direction with reference to a value set at the time of shooting. In addition to the light source set at the time of shooting (setting at the time of shooting in the figure), the light source parameter is the optimum color temperature when shooting with incandescent bulbs, fluorescent lamps, sunlight, strobe light, cloudy, and shaded light sources. Is set. In the vicinity of each reference image, parameter values (“+1/2 EV”, “−1 EV”, etc.) and types (“incandescent light bulb”, “fluorescent lamp”, etc.) corresponding to them are displayed.

  In this way, the parameters of the two image processing items are arranged vertically and horizontally, and the reference image 46 when the respective parameters are changed is arranged in a matrix, whereby the image finish when the combination of the two parameters is changed. Can be listed. As a result, an image closer to the actual finish can be confirmed as compared with the conventional case where only one parameter is changed and the finish of the image is confirmed.

  This parameter is specified as follows. Since the same image as the parameter index print 17 is displayed on the display 28 of the console 27, the operator confirms the reference image 46 designated by the customer 12 on the screen of the display 28, and the corresponding reference image 46 is displayed. Is selected, the parameter corresponding to the reference image 46 is designated. In the present embodiment, the interval for changing the parameter of exposure adjustment is 1/2 EV. However, the interval can be appropriately changed by changing it by 1/3 EV. Note that the above-described interval and type for changing the parameters may be set in advance, or may be set or changed from the console 27.

  The operation of the above configuration will be described below with reference to the flowchart of FIG. When the RAW data print order is received, the operator sets the memory card 13 brought in by the customer 12 in the card reader 22, reads out the RAW data, and loads it into the print order receiving apparatus 10. The print order receiving apparatus 10 performs digital development processing on the RAW data based on the image processing conditions based on the accompanying information attached to the RAW data. An index image is created using the image data that has been subjected to the digital development processing. When the index image is created, the index image is displayed on the display. The index print 16 is printed out by the photo printer 33. The printed index print 16 is provided to the customer 12.

  When the customer 12 selects the basic image 45 to be digitally developed under the same processing conditions from the basic image 45 of the index print 16 and tells the operator, the operator refers to the index image displayed on the display 28, The basic image 45 selected by the customer 12 is designated. For example, when the basic image 45 to be subjected to digital development processing under the same processing conditions is designated, the system controller 21 performs digital development processing under the same processing conditions on the RAW data that is the basis of the designated basic image. Information indicating the effect is added. As a result, RAW data for performing digital image processing under the same processing conditions is grouped from the RAW data stored in the data storage device.

  After a basic image 45 to be subjected to digital development processing under the same processing conditions is selected, a basic image 45 for creating a parameter index image is selected from these basic images 45 and told to the operator. The basic image 45 for creating the parameter index print 17 is specified via. When the basic image 45 is designated, the development condition setting unit 38 reads RAW data that is the basis of the designated basic image 45. Then, on the basis of the processing conditions based on the incidental information attached to the RAW data, among the image processing items, parameters for the WB processing and the exposure processing are changed in stages, and a plurality of processing conditions in which these parameters are combined. Set. Using this set processing condition, digital development processing is performed on the RAW data based on the image when creating the parameter index image. After this digital development process is executed, a parameter index image is created. The parameter index image is displayed on the display 28 and printed out as a parameter index print 17 by the photographic printer 33. The parameter index print 17 printed out by the photo printer 33 is provided to the customer 12.

  The customer 12 selects the reference image 46 preferred by the customer 12 from the parameter index print 17 and informs the operator. The operator designates the selected parameter by selecting the reference image 46 selected by the customer 12 while viewing the parameter index image displayed on the display 28.

  When a parameter is specified, grouped RAW data is read from the RAW data stored in the data storage device 24, and then digital development processing using the selected processing conditions is performed on the RAW data. . The image data that has been subjected to the digital development processing is transferred to the photographic printer 33 and then printed out as a main print 18. The printed main print 18 is provided to the customer 12. For example, when the plurality of selected basic images are images of the same person as the subject image, the main print subjected to the same image processing is output, resulting in variations in the finish of the main print. Without any problem, it is possible to obtain a main print with a unified color tone.

  In addition, when the plurality of selected basic images are images obtained in the same time zone, it is possible to obtain a main print with a uniform hue without causing variations in the finish of the main print. In this case, for example, it is possible to suppress a difference in hue when an image including a light source such as a light bulb or an image affected by light emitted from the light source is compared with an image not affected by the light source. . In addition, even if the selected basic images are images obtained at the same location, the actual prints that have been subjected to the same image processing are output, so that there is no variation in the finish of the actual prints. Can obtain a unified book print. The same applies to images obtained by imaging the same scene or similar scenes. Note that an image that is not selected as an image to be subjected to digital development processing under the same processing conditions is subjected to digital development processing under processing conditions set based on supplementary information attached to RAW data, for example.

  When another image is used as the parameter index image, the index image is displayed on the display 28, and the image used as the parameter index image is reselected. As a result, it is possible to confirm in advance the finish for the image selected when digital development processing is performed under the same processing conditions, so that the finish intended by the customer and the actual finish of the actual print may differ. Disappear.

  In the present embodiment, an image used for parameter index printing is subjected to image processing under a plurality of processing conditions in which one of the image processing items is changed step by step with reference to shooting conditions attached to the RAW data. However, the present invention is not limited to this. For example, after obtaining brightness values, for example, from a plurality of selected basic images, an average brightness value is calculated. Based on the average value of the brightness, processing conditions for WB processing of RAW data based on the selected basic image are set, and digital development processing is performed on the RAW data. In addition, as a parameter for determining the processing condition, in addition to the brightness value, color and the like can be cited.

  In this embodiment, the basic images selected by the customer from the index images are grouped as images to be subjected to digital development processing under the same processing conditions. However, the present invention is not limited to this. For example, the read image data is automatically analyzed. Then, the images subjected to the digital development processing under the same processing conditions may be grouped from the analysis result. In this case, for example, a program for discriminating the face of the subject image or a program for automatically discriminating a scene obtained from the image is used.

  In the above example, the print order receiving apparatus installed in a print service store or the like has been described as an example. However, like the print order receiving server 71 shown in FIG. The print order from the PC (personal computer) 73 of the customer 12 may be received. In this case, a print order reception site is opened on the web of the Internet 72, and a print order is made by the PC 73 of the customer 12 accessing the print order reception site. The print 17 created by performing image processing with the designated parameters is provided to the customer 12 at a later date.

  In the above example, a print order receiving apparatus having an index image creating function for creating a parameter index image has been described as an example. However, the present invention may be applied to an apparatus dedicated to creating an index image that does not have a print order receiving function. Good. The scope of the present invention naturally includes a case where an index image creating function for creating a parameter index image and a print order receiving function using the parameter image are realized in the form of a program for causing a computer to execute the function.

It is a block diagram of a print order reception apparatus. It is explanatory drawing of an index print. It is explanatory drawing of parameter index printing. It is a flowchart which shows a print order reception procedure. It is explanatory drawing of the print order reception via a network.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Print order reception apparatus 11 Print service store 12 Customer 13 Memory card 16 Index print 17 Parameter index print 18 Print 23 Image processing part 24 Data storage device 27 Console 28 Display 29 Operation part 33 Photo printer 35 Format conversion part 36 Development condition setting Section 37 Digital development processing section 38 Index image creation section

Claims (11)

In an image output apparatus that performs image output using image data,
Image capturing means for capturing a plurality of raw image data captured by an imaging device and stored without being subjected to digital development processing;
Basic data selection means for selecting basic image data from raw image data captured by the image capture means;
A plurality of reference images obtained by subjecting the basic image data selected by the basic data selection means to image processing under a plurality of processing conditions different from each other for a plurality of image processing items included in the digital development processing are defined as 1 First image processing means for creating a reference index image arranged in a screen;
And a second image processing unit that performs digital development processing using a processing condition selected from the reference index image on a plurality of raw image data captured by the image capturing unit. An image output device.   Basic using a basic image obtained by performing image processing based on the additional information attached to the raw image data on each of the plurality of raw image data and performing image processing based on the additional information The image output apparatus according to claim 1, further comprising third image processing means for creating an index image. An image selecting means for selecting a basic image to be subjected to uniform image processing from the basic index image, and an image to which raw image data based on a plurality of basic images selected by the image selecting means is subjected to the same image processing Image classification means for classifying as a data group,
3. The image output apparatus according to claim 2, wherein the basic data selection means selects basic image data from the image data group classified by the image classification means.   4. The image output apparatus according to claim 3, wherein the image obtained from the image data classified as the image data group is an image in which a person as a subject image is the same person.   5. The image output apparatus according to claim 3, wherein the image obtained from the image data classified as the image data group is an image in which the time zone captured by the imaging device is the same time zone.   The image output apparatus according to claim 3, wherein the image obtained from the image data classified as the image data group is an image in which the place imaged by the imaging apparatus is the same place.   The image output apparatus according to claim 1, wherein the image processing items include at least two of exposure adjustment, white balance adjustment, and color adjustment.   8. The image output apparatus according to claim 1, further comprising display means for displaying the basic index image and the reference index image.   9. The image output apparatus according to claim 1, further comprising print output means for printing out the basic index image and the reference index image. In an image output method for outputting an image using image data,
Capturing a plurality of raw image data captured by an imaging device and stored without being subjected to digital development processing;
Selecting basic image data from the captured raw image data;
A plurality of reference images obtained by subjecting selected basic image data to image processing under a plurality of different processing conditions for a plurality of image processing items included in the digital development processing are arranged in one screen. Creating a reference index image;
And a step of performing digital development using a processing condition selected from the reference index image on a plurality of the captured raw image data. Image reading means for capturing a plurality of raw image data captured without being subjected to digital development processing and photographed by an imaging device;
Basic data selection means for selecting basic image data from the captured raw image data;
A plurality of reference images obtained by subjecting selected basic image data to image processing under a plurality of different processing conditions for a plurality of image processing items included in the digital development processing are arranged in one screen. First image processing means for creating a reference index image;
An image output for causing a computer to function as second image processing means for performing digital development processing using a processing condition selected from the reference index image on a plurality of captured raw image data program.

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