JP2010259050A - Electronic camera and development processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate development processing to a plurality of RAW data items. <P>SOLUTION: An electronic camera includes: a first storage unit for storing a plurality of first image data items obtained by applying at least A/D conversion to an image signal of a single color component captured during photographing; a setting unit capable of setting a development condition to a preset photographic scene; a second storage unit for storing the development condition set by the setting unit in association with the photographic scene; a scene decision unit for determining a photographic scene when first image data is captured; and an image processing unit for applying image processing, using the development condition corresponding to the photographic scene determined from the first image data, to each of the first image data items stored in the first storage unit. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic camera and a development processing program, and more particularly to development processing for RAW image data.

  Generally provided digital cameras automatically perform image processing based on photographing conditions set at the time of photographing on an image signal obtained by photoelectrically converting subject light by an image sensor, and then the JPEG format. It is common to perform compression processing based on a predetermined compression format. In recent years, digital cameras that store image signals (hereinafter referred to as RAW image data) that have been subjected only to A / D conversion processing without performing the above-described image processing or compression processing on image signals captured by shooting. Is provided. RAW image data acquired by such a digital camera is generally developed using development software built in a PC or the like, for example. Recently, a digital camera having a developing function for RAW image data is also provided. By performing development processing using such development software or a development function installed in a digital camera, it is possible to finish image data that the user prefers rather than image processing that is automatically executed inside the digital camera at the time of shooting. it can.

JP 2007-124599 A

  However, when development processing is performed on a plurality of RAW image data, it is necessary to perform processing such as adjustment or change of parameters used for the development processing for each RAW image data. Processing is troublesome and time consuming.

  An object of the present invention is to provide an electronic camera and an image processing program capable of easily executing development processing on a plurality of RAW data.

  In order to solve the above-described problem, an electronic camera according to the present invention includes a first storage unit that stores a plurality of first image data obtained by performing at least A / D conversion on an image signal of a single color component captured at the time of photographing. A setting unit capable of setting development conditions for a preset shooting scene; a second storage unit for storing the development conditions set by the setting unit in association with the shooting scene; and the first image data acquired Development conditions corresponding to the shooting scene determined from the first image data, for each of the first image data stored in the first storage unit And an image processing unit for performing a developing process using.

  Further, the first image data is attached with shooting information indicating a shooting condition at the time of shooting, and the specifying unit refers to the shooting information attached to the first image data, thereby the first image data. It is preferable to determine the shooting scene when the image data is acquired.

  The image processing unit generates second image data by executing development processing using a condition different from the development condition for the first image data, and the scene determination unit includes the first image data. It is preferable to determine the shooting scene when the first image data is acquired by analyzing two image data.

  In addition, a setting operation unit capable of setting and operating the shooting scene at the time of shooting is provided, and the image processing unit applies the shooting scene to the first image data in which the shooting scene at the time of shooting is set by the setting operation unit. It is preferable to perform development processing using development conditions based on the above.

  The first storage unit preferably stores third image data after the development processing is performed by the image processing unit in addition to the first image data.

  The development processing program of the present invention includes a first storage step for storing a plurality of intermediate image data obtained by performing at least A / D conversion on an image signal of a single color component captured at the time of shooting, and a preset shooting scene. A setting step for setting development conditions for the image, a second storage step for storing the development conditions set in the setting step in association with the shooting scene, and a shooting scene when the first image data is acquired Development for performing a development process using a development condition corresponding to the photographing scene determined from the first image data, for each of the determination step and the first image data stored in the first storage step And a processing step.

  According to the present invention, it is possible to easily execute development processing for a plurality of image data.

It is a block diagram which shows the outline of a structure of a digital camera. It is a figure which shows an example of the menu screen regarding a development process. It is a figure which shows an example of the setting screen regarding target image setting. It is a figure which shows an example of an image selection screen. It is a figure which shows an example of a development setting screen. It is a figure which shows an example of a parameter setting screen. It is a figure which shows an example of a scene setting screen. It is a flowchart which shows the flow of a development process. It is a flowchart which shows the flow of the process which discriminates a photography scene. It is a figure which shows an example of the screen displayed when performing a developing process with respect to the RAW image data in which the imaging scene is not set during a developing process.

  Hereinafter, a digital camera will be described as an example of the electronic camera of the present embodiment. As shown in FIG. 1, the digital camera 10 photoelectrically converts subject light captured via the imaging optical system 15 by the imaging element 21 and outputs the signal charge after the photoelectric conversion as an image signal. Hereinafter, the act of acquiring image data using the digital camera 10 will be referred to as shooting, and the internal processing of the digital camera 10 executed at the time of shooting will be referred to as shooting.

  The imaging optical system 15 includes a lens group including an imaging lens, a zoom lens, a focus lens, and the like that are not shown. The zoom lens moves along the optical axis L so as to obtain the selected photographing magnification. The focus lens slightly moves along the optical axis L when adjusting the focus of the subject image. The zoom lens, the focus lens, and the like constituting this lens group are driven and controlled by a lens driving mechanism (not shown).

  The imaging device 21 is configured by, for example, a CCD (Charge Coupled Device), a CMOS (Complementary Metal-Oxide Semiconductor), or the like. The image sensor 21 receives subject light captured by the imaging optical system 15, converts the received light amount into signal charges (photoelectric conversion), and accumulates the converted signal charges.

  The driver 22 drives and controls the image sensor 21. The drive control of the image sensor 21 is so-called thinning-out that controls the pixels that receive the subject light and the pixels that do not receive the light in addition to the accumulation of the signal charges for each pixel of the image sensor 21 and the output of the accumulated signal charges. For example, control is performed. The image data obtained by performing the thinning control is used when displaying a through image on the LCD 38 described later. Hereinafter, the signal charge output from the image sensor 21 will be described as an image signal.

  The AFE (Analog Front End) circuit 23 includes an AGC circuit and a CDS circuit (not shown). The AFE circuit 23 performs analog processing such as gain control and noise removal on the input image signal. The image signal subjected to the analog processing is output to the DFE circuit 24.

  A DFE (Digital Front End) circuit 24 converts an image signal subjected to analog processing by the AFE circuit 23 into a digital signal. Reference numeral 25 denotes a timing generator (TG), and the driving timing of the driver 22, the AFE circuit 23, and the DFE circuit 24 is controlled by the TG 25. The buffer memory 31 stores image data obtained by collecting the image signals digitized by the DFE circuit 24 for each frame.

  For example, when “RAW” is set as the image quality mode, the image data stored in the buffer memory 31 is stored in the storage medium 37 in the RAW format (uncompressed format) as it is. At this time, image data in the RAW format (hereinafter referred to as RAW image data) includes thumbnail image data, additional information such as model information of the digital camera 10 and imaging conditions set at the time of shooting as a single image file. 37. Hereinafter, an image file using RAW format image data will be referred to as a RAW image file. Note that thumbnail image data stored as a RAW image file is subjected to image processing using image processing conditions used when, for example, generating so-called through image data in an image processing circuit 35 to be described later. Generated by execution.

  The image processing circuit 35 performs image processing on the image data stored in the buffer memory 31. Since this image processing is well known, details are not described, but examples include color interpolation processing, white balance correction processing, contour compensation processing, gradation conversion processing, compression / decompression processing, and the like. After these image processing, the image processing circuit 35 performs compression processing on the image data subjected to the image processing, for example, in a compression format such as a Jpeg format. This compressed image data (hereinafter referred to as Jpeg image data) is, for example, thumbnail image data generated so as to be of lower quality than Jpeg image data, model information of the digital camera 10, and imaging conditions set at the time of shadowing. Are collected as an image file (hereinafter referred to as a Jpeg image file) with accompanying information and recorded in the storage medium 37 via the media slot 36.

  The image processing circuit 35 can perform image processing on the RAW image data of the RAW image file stored in the storage medium 37 in addition to the image data stored in the buffer memory 31. Hereinafter, the image processing executed on the RAW image data of the RAW image file is referred to as development processing. This development process is executed based on the photographic scene determined by the scene determination unit 51 described later. The image data subjected to the development processing is subjected to compression processing in, for example, JPEG format so as to have an image size set by a condition setting unit 52 described later, and is stored in the storage medium 37 as a JPEG image file. . This Jpeg image file is stored in the storage medium 37 with a file name different from the RAW image file that is the source of the image file.

  The LCD 38 is one form of a display device, and displays a through image that is captured in a shooting standby state and an image obtained during imaging. In addition to this, the LCD 38 displays an image for setting when the digital camera 10 is set. Reference numeral 39 denotes a display control circuit that performs drive control of the LCD 38.

  The CPU 41 comprehensively controls each unit of the digital camera 10 by executing a control program (not shown) stored in the built-in memory 42. The CPU 41 is connected to the buffer memory 31, the image processing circuit 35, the media slot 36, the display control circuit 39, and the built-in memory 42 via the bus 43. The CPU 41 can receive operation signals from the release button 44, the setting operation unit 45, and the scene mode dial 46.

  The release button 44 is a button operated during shooting. Although not shown, the release button 44 is provided with a half-push switch that is turned on when a half-press operation is performed and a full-push switch that is turned on when a full-push operation is performed. For example, when the half-press switch is turned on, the CPU 41 executes AE processing, AF processing, and the like. Further, when the full push switch is turned on, the CPU 41 executes an imaging process.

  The setting operation unit 45 is operated, for example, when performing various settings in the digital camera 10. Examples of the various settings include, for example, a case where a clock function built in the digital camera 10 is set, a sensitivity setting during shooting (ISO sensitivity setting), an image size setting, an image quality setting, and the like. For example, items for setting image quality include “RAW” in addition to “FINE”, “NORMAL”, “BASIC”, and the like. Among these items, “FINE”, “NORMAL”, and “BASIC” are selected when the JPEG image file is stored in the storage medium 37 at the time of shooting. In these items, the compression rate at the time of compression processing is different. For example, when “FINE” is selected, the compression rate during the compression process is set to ¼. If “NORMAL” is selected, the compression rate during the compression process is set to 1/8. Further, when “BASIC” is selected, the compression rate at the time of compression processing is set to 1/16. As a result, the image quality of the image data obtained when each item is selected is good for “FINE” and worse for “NORMAL” and “BASIC”. On the other hand, “RAW” is selected when a RAW image file is stored in the storage medium 37 at the time of shooting.

  The scene mode dial 46 is operated when setting a shooting scene at the time of shooting (hereinafter referred to as a shooting scene). Examples of preset scenes include “Auto”, “Portrait”, “Landscape”, “Night Scene”, “Sports”, “Close-up”, “Other”, etc. When performing the above, one of these shooting scenes is selected. Note that the information of the shooting scene selected by the scene mode dial 46 is one of the incidental information of the image file stored in the storage medium 37.

  The CPU 41 has functions of a scene determination unit 51 and a condition setting unit 52 by executing the control program described above. The scene determination unit 51 determines a shooting scene when a RAW image file is acquired. Specifically, the scene determination unit 51 determines whether or not the incidental information of the RAW image file stored in the storage medium 37 includes information related to a shooting scene at the time of shooting (hereinafter, scene information). For example, when scene information is not included as the auxiliary information or when “auto” is selected as the shooting scene, the scene determination unit 51 displays the shooting conditions and thumbnail image data that are part of the auxiliary information. The shooting scene is discriminated by referring to it. On the other hand, when the scene information based on the shooting scene selected by the scene mode dial 46 at the time of shooting is included in the incidental information of the RAW image file, the scene determination unit 51 does not determine the shooting scene but performs shooting. The scene information at the time is applied as it is as a result of scene discrimination. Note that the scene determination unit 51 determines the photographic scene for a raw image file that has not undergone development processing among raw image files stored in the storage medium 37.

  In response to the user operating the setting operation unit 45, the condition setting unit 52 sets the development conditions associated with the shooting scene. These development conditions are set in association with each of a plurality of preset shooting scenes. The set development conditions are stored in the built-in memory 42 as preset setting data 56 associated with the shooting scene. Examples of items that can be changed as development conditions include “finish setting”, “image size”, “white balance”, and “exposure correction”.

  The built-in memory 42 stores an operator calculated when the CPU 41 described above executes a control program, as well as setting data 55 relating to development processing, preset shooting scenes, and development parameters in the shooting scenes. The associated preset setting data 56 is stored. As the setting data 55 described above, among the RAW image files stored in the storage medium 37, all RAW image files that have not been subjected to development processing are to be developed, or a part thereof is to be developed. In the case where a part of a raw image file that has not undergone development processing is set as the development target, information on the file name of the raw image file to be developed can be mentioned. In addition to this, there is information indicating whether the RAW image file that has not undergone the development process is subjected to the development process under the same development condition or the development condition set for each shooting scene. It is done.

  Hereinafter, a display screen displayed on the LCD 38 during the development process will be described. As shown in FIG. 2, when developing a RAW image file, a development processing menu screen 60 is displayed on the LCD 38. The menu screen 60 relating to the development processing includes, for example, a “target image setting” item 62, a “development setting” item 63, “development execution”, in addition to a title name (reference numeral 61 in the figure) consisting of “continuous RAW development” Selectable items such as the item 64 and the item 65 “return” are displayed.

  For example, the “target image setting” item 62 executes development processing for all raw image files that have not undergone development processing, or performs development processing for a part of a raw image file that has not undergone development processing. It is an item to set whether to execute. The “development setting” item 63 is an item for setting whether to develop all images with the same setting or to set for each shooting scene. In these “target image setting” item 62 and “development setting” item 63, for example, the current setting is displayed. It should be noted that the item “Development execution” 64 is an item for canceling the processing related to the development process when the development process is executed, and the item 65 “Return” is canceled.

  FIG. 3 is an example of an image setting screen displayed on the LCD 38 when “target image setting” is selected. In this image setting screen 70, in addition to the title name “reference image setting” (reference numeral 71 in the figure), an “all images” item 72, an “select image” item 73, and a “return” item Selectable items such as 74 are displayed. For example, the item 72 of “all images” is an item selected when the entire RAW image file that has not been subjected to development processing is targeted. When this “all images” item 72 is selected, for example, a comment such as “all images are targeted for development” is displayed, and then the screen switches to the development processing menu screen 60 shown in FIG. When the menu screen 60 is displayed, for example, when “all images” is newly set as the target image, the current setting in the “target image setting” item 62 is, for example, “selected image”. To “all images”.

  On the other hand, the item 73 “select image” is an item selected when a RAW image file to be developed is specified among RAW image files that have not been developed yet. When this item 73 is selected, the screen is switched to an image selection screen 76 for selecting an image to be developed (see FIG. 4). The image selection screen 76 displays an index of images based on raw image files that have not undergone development processing. The index display may use thumbnail image data stored in the RAW image file. When the target image is selected from the index display, the selection of the image is finished, and the screen is switched to the development processing menu screen 60 shown in FIG. When the menu screen 60 is displayed, for example, when an image to be developed is selected, the display in the “target image setting” item 62 is switched from “all images” to “selected images”, for example. The “return” item 74 displayed on the image setting screen 70 is an item that is selected when the set condition is not changed. When this item 74 is selected, the menu screen 60 is returned.

  Returning to FIG. 2, when the “development setting” item 63 displayed on the development processing menu screen 60 is selected, the screen is switched to the development setting screen 80 (see FIG. 5). In the development setting screen 80, in addition to the title name 81 of "development setting", an item 82 of "develop all images with the same setting", an item 83 of "set and develop for each scene", and an item 84 of "return" Items that can be selected are displayed.

  For example, the item 82 “develop all images with the same settings” is an item selected when performing development processing with the same development parameters. On the other hand, the item 83 “set and develop for each scene” is an item selected when the development process is performed using the development parameters set for each shooting scene. The “return” item 84 displayed in this case is an item selected when “development setting” is not performed.

  FIG. 6 is a parameter setting screen 90 displayed when the item 82 “Develop all images with the same setting” is selected on the development setting screen 80. This parameter setting screen 90 is displayed when setting development conditions used during development processing. The parameter setting screen 90 includes a title name 91 of “develop all images with the same setting”, an item 92 of “finish setting”, an item of “image size” 93, and a “white balance” as development parameters that can be set. ”Item 94,“ exposure correction ”item 95, and the like. Note that the “setting end” item 96 is selected when the development parameter setting is to be ended. When the “setting end” item 96 is selected, the display returns to the development processing menu screen 60. The development conditions set on the parameter setting screen 90 are stored in the built-in memory 42 as preset setting data 56.

  FIG. 7 is a scene setting screen 100 that is displayed when the “set and develop for each scene” item 83 is selected on the development setting screen 80. This scene setting screen 100 includes, in addition to the title name 101 “set for each scene and develop”, a “portrait” item 102, a “landscape” item 103, a “night view” item 104, Items that can be selected include a “close-up” item 105, a “sports” item 106, and an “others” item 107. When any of these shooting scene items is selected, the display is switched to the parameter setting screen based on the shooting scene.

  The parameter setting screen in this case has the same configuration as in FIG. 6, and the development parameters described above can be set for each item. It should be noted that the parameter setting screen displayed when setting the parameters for each shooting scene has an item “end setting”. When this “setting end” item is selected, the individual parameter setting screen 100 is displayed from the parameter setting screen. Switch to That is, when the item “set and develop for each scene” is selected, the development conditions for each shooting scene can be set for each shooting scene. The development parameters set for each shooting scene are stored in the built-in memory 42 as preset setting data 56 for each shooting scene. When the “setting end” item 108 on the individual parameter setting screen 100 is selected, the screen returns to the development processing menu screen 60.

  Next, a procedure of processing relating to development processing and development setting of a RAW image file will be described based on flowcharts shown in FIGS. This flowchart is executed when an item for executing development is selected. Hereinafter, a case where development processing is performed on all RAW image files that have not been subjected to development processing will be described.

  Step S201 is processing for determining whether or not there is a raw image file that has not undergone development processing. The CPU 41 refers to the incidental information of all RAW image files stored in the storage medium 37. For example, when information indicating the history of development processing is included in the incidental information of all RAW image files, the CPU 41 determines that there is no RAW image file that has not undergone development processing. In this case, the process of step S201 is No, and the development process of the RAW image file ends. On the other hand, when the information indicating the development processing history is not included in the incidental information of any RAW image file, the CPU 41 determines that there is an unprocessed RAW image file. In this case, the process of step S201 is Yes, and the process proceeds to step S202. At this time, the CPU 41 generates list data indicating a list of RAW image files in which the information indicating the history of the development process is not included in the incidental information, that is, the development process has not been processed. The list data is recorded in the built-in memory 42, for example.

  Step S202 is processing for determining whether or not there is a cancel request. For example, when the development processing of the RAW image file is stopped from the processing for determining the shooting scene, the setting operation unit 45 performs an operation indicating a request for cancellation. When a signal based on an operation indicating the cancellation request is input to the CPU 41, the CPU 41 determines that there is a cancellation request. In this case, the determination in step S202 is Yes, and the development processing of the RAW image file ends. On the other hand, when the signal based on the operation indicating the cancellation request is not input to the CPU 41, the CPU 41 determines that there is no cancellation request. In this case, the determination in step S202 is No, and the process proceeds to step S203.

  Step S203 is a process of reading a raw image file that has not undergone development processing. By executing the processing of step S201, list data indicating a list of unprocessed RAW image files is generated. Therefore, the CPU 41 refers to the list data, and the CPU 41 refers to the list data. Read the file.

  Step S204 is processing for setting whether or not to execute development processing for each shooting scene. The CPU 41 executes the determination in step S204 by reading the setting data 55 stored in the built-in memory 42. For example, if there is information in the setting data 55 that the development process is performed using the development conditions set for each shooting scene, the CPU 41 determines Yes in step S204. In this case, the process proceeds to step S205. On the other hand, if the setting data 55 includes information indicating that the development process is performed under the same development condition, the CPU 41 determines No in step S204. In this case, the process proceeds to step S210.

  Step S205 is processing for determining whether or not the image is a RAW image file obtained by shooting using the scene mode. In the RAW image file stored in the storage medium 37, information indicating shooting conditions at the time of shooting is attached as additional information. The CPU 41 reads supplementary information of a raw image file that has not undergone development processing, and determines whether or not information indicating that shooting is performed using a scene mode is stored. When information indicating that the shooting is performed using a scene mode other than “auto” is stored, the CPU 41 determines that the process of step S205 is Yes. In this case, the process proceeds to step S206. On the other hand, when the information indicating that the shooting is performed using the scene mode is not stored, or when the information indicating that the shooting is performed by selecting “Auto” in the scene mode, the CPU 41 is stored. Determines No in step S205. In this case, the process proceeds to the process of determining the shooting scene in step S215. The process of step S215 will be described later.

  Step S206 is processing for setting a scene mode at the time of shooting as a shooting scene at the time of development. The CPU 41 gives information indicating that the scene mode selected at the time of shooting is used as the shooting scene used at the time of development processing to the incidental information of the RAW image file.

  Step S207 is processing for performing development processing using the development conditions corresponding to the set shooting scene. Since the development parameters for each shooting scene are stored in the built-in memory 42 as preset setting data 56, the CPU 41 reads out the development parameters based on the set shooting scene and outputs them to the image processing circuit 35. . At the same time, RAW image data is read from the RAW image file stored in the storage medium 37 and written to the buffer memory 31. The image processing circuit 35 reads out the RAW image data written in the buffer memory 31 and executes development processing on the RAW image data. As a result, image data in Jpeg format that has undergone development processing using the set development conditions is generated.

  Step S208 is processing for recording a Jpeg image file. The CPU 41 reads the incidental information attached to the RAW image file, and generates new incidental information in which information such as the date and time of the development process and the shooting scene used during the development process are collected in the read incidental information. Then, the CPU 41 writes the Jpeg image file in which the Jpeg image data generated in step S207 and the accompanying information are combined into one into the storage medium 37. At the same time, the CPU 41 gives information indicating that the development processing has been performed to the accompanying information of the RAW image file that is the basis of the generated Jpeg image file. When the process of step S208 is completed, the process returns to step S201.

  In the process of S204 described above, when the development process for each shooting scene is not executed, the process proceeds to step S210. Step S210 is processing for executing development processing using the same development conditions. The CPU 41 refers to the preset setting data 56 stored in the built-in memory 42 and reads the development conditions when performing development processing with the same settings. The read development conditions are output. At the same time, the CPU 41 reads RAW image data from the RAW image file stored in the storage medium 37 and writes it in the buffer memory 31. The image processing circuit 35 reads out the RAW image data written in the buffer memory 31 and executes development processing on the RAW image data. In conjunction with this development processing, Jpeg-format image data is generated that has been subjected to compression processing so that the image data after the development processing has the image size set by the setting parameter. After this process, the process of step S208 is executed. The image data in the Jpeg format is written to the storage medium 37 as a Jpeg image file with the same information as the incidental information of the RAW image file. The file name of the Jpeg image file is different from the file name of the RAW image file that is the basis of the Jpeg image file.

  In addition, after the process of step S208 mentioned above is performed, it returns to step S201. In other words, when a plurality of raw image files that have not been subjected to development processing are stored, the processing from step S201 to step S208 (including the processing of step S210 and step S215) is performed as a raw image that has not undergone development processing. Runs on all of the files.

  Hereinafter, the process of determining the shooting scene will be described based on the flowchart shown in FIG. Note that the flowchart shown in FIG. 9 shows an example of processing for determining a shooting scene, and the present invention is not limited to this.

  Step S301 is processing for detecting whether or not there is a face larger than a predetermined size. The CPU 41 reads thumbnail image data from the target RAW image file. Then, face detection is executed using the read thumbnail image data. Since face detection is well known, its details are omitted here. When a face is detected from the thumbnail image data, an address of a pixel included in the detected face area is specified. Then, for example, the CPU 41 calculates the ratio of the pixels included in the face area with respect to all the pixels of the thumbnail image data. When this ratio is greater than or equal to a preset value, the CPU 41 determines that there is a face that is greater than or equal to a predetermined size. In this case, the determination in step S301 is Yes, and the process proceeds to step S302. On the other hand, when the ratio is less than a preset value, the CPU 41 determines that there is no face having a predetermined size or more. In this case, the determination in step S301 is No, and the process proceeds to step S303.

  Step S302 is processing for setting the photographing scene to “portrait”. In step S301, it is determined that there is a face having a predetermined size or more. That is, since it is estimated that such an image is shot under shooting conditions close to portrait shooting, the CPU 41 sets “portrait” as a shooting scene for such an image.

  In step S301, if the CPU 41 determines that there is no face having a predetermined size or more, the process proceeds to step S303.

  Step S303 is processing for determining whether there is a blue sky having an area of a predetermined size or more. Although not shown in the figure, the CPU 41 obtains a blue range that can be recognized as a blue sky beforehand by means of statistics or the like, and is therefore included in the blue range that can be recognized as a blue sky by referring to the color information of each pixel of the thumbnail image data. Find the number of pixels. Then, the CPU 41 obtains the ratio of the number of pixels included in the blue range that can be recognized as the blue sky with respect to all the pixels of the thumbnail image data. When this ratio is equal to or greater than a preset value, the CPU 41 determines that there is a blue sky having an area of a predetermined size or more. In this case, the process of step S303 is Yes, and the process proceeds to step S304. On the other hand, when the above-described ratio is less than a preset value, the CPU 41 determines that there is no blue sky having an area of a predetermined size or more. In this case, the process in step S303 is No, and the process proceeds to step S305.

  Step S304 is processing to set the shooting scene to “landscape”. In step S303, it is determined that the ratio of the number of pixels included in the blue range that can be recognized as the blue sky to all the pixels of the thumbnail image data is greater than or equal to a preset value. That is, since it is estimated that such an image is shot under shooting conditions close to landscape shooting, the CPU 41 sets “landscape” as a shooting scene for such an image. In the case of landscape photography, not only the blue sky described above, but also mountains and seas may be photographed. Therefore, when determining whether or not the photographing scene is “landscape”, the blue sky region has a predetermined size. In addition to whether or not this is the case, it may also be determined whether or not a mountain or sea area is a predetermined size or more.

  In step S303, when the CPU 41 determines that there is no blue sky having an area of a predetermined size or more, the process proceeds to step S305.

  Step S305 is processing for determining whether or not the shutter speed is low and the luminance in the image is equal to or lower than a predetermined value. The CPU 41 reads the shooting condition from the incidental information of the target RAW image file, and determines whether or not the shutter speed set at the time of shooting is equal to or lower than the reference speed. It should be noted that the reference speed may be the reference speed that is the fastest shutter speed used when “night view” is previously selected in the scene mode. If it is determined that the shutter speed set at the time of shooting is equal to or lower than the reference speed, the CPU 41 determines that the shutter speed at the time of shooting is low.

  After determining that the shutter speed at the time of shooting is low, the CPU 41 determines whether or not the luminance value obtained from the thumbnail image data is equal to or less than a predetermined value. In addition to calculating the luminance value from the pixel value of each pixel of the thumbnail image data and determining whether or not the average value is equal to or less than a predetermined value, this determination includes, among the pixels included in the thumbnail image data, What is necessary is just to obtain | require the number of the pixels from which a luminance value becomes below a predetermined value, and to determine whether the number of this pixel becomes above a predetermined number. If the CPU 41 determines that the luminance value obtained from the thumbnail image is equal to or less than the predetermined value, the determination in step S305 is Yes, and the process proceeds to step S306.

  On the other hand, if the CPU 41 determines that the shutter speed is not low, or if the shutter speed is low but the luminance in the image exceeds a predetermined value, the determination in step S305 is No, The process proceeds to step S307.

  Step S306 is processing to set the shooting scene to “night view”. In step S305, it is determined that the shutter speed at the time of shooting is low, and the luminance value obtained from the thumbnail image is equal to or less than a predetermined value. That is, when shooting a night scene, the brightness of the subject light captured from the imaging optical system 15 is low, and therefore the shutter speed is low, that is, the exposure time (charge accumulation time in the image sensor 21) is set to be long. Since it is estimated, the CPU 41 sets “night view” as a shooting scene for such an image.

  If it is determined in step S305 that the shutter speed at the time of shooting is low and the luminance value obtained from the thumbnail image is not less than the predetermined value, the process proceeds to step S307.

  Step S307 is processing for determining whether or not the shooting is at a short distance. The CPU 41 reads position information of the imaging optical system 15 from the incidental information of the target RAW image file. As described above, the imaging optical system 15 includes a plurality of lenses, and the position of each lens is specified at the time of shooting. The CPU 41 calculates the distance to the subject based on the position information of the imaging optical system 15. Then, the CPU 41 determines whether or not the calculated distance is within the range of the distance to the subject when close-up shooting is performed. If the distance calculated by the CPU 41 is within the range of the distance to the subject when the close-up shooting is performed, the CPU 41 determines that the shooting is at a short distance. In this case, the determination in step S307 is Yes, and the process proceeds to step S308. On the other hand, when it is determined that the distance calculated by the CPU 41 is out of the range of the distance to the subject when close-up shooting is performed, the CPU 41 determines that the shooting is not close-up shooting. In this case, the determination in step S307 is No, and the process proceeds to step S309.

  Step S308 is processing to set the shooting scene to “close-up shooting”. In step S307, since it is determined that the distance calculated by the CPU 41 is within the range of the distance to the subject when close-up shooting is performed, in such a case, the CPU 41 sets the shooting scene as “close-up shooting”. To "".

  Step S309 is processing for determining whether or not the shutter speed is equal to or higher than a predetermined value. CPU41 reads the shutter speed at the time of imaging | photography from the incidental information of the RAW image file used as object. Then, the CPU 41 determines whether or not the read shutter speed is equal to or higher than a predetermined value set in advance. For example, if it is determined that the read shutter speed is greater than or equal to a predetermined value set in advance, the CPU 41 determines Yes in step S309 and proceeds to step S310. On the other hand, for example, if it is determined that the read shutter speed is less than a predetermined value set in advance, the CPU 41 determines No in step S309 and proceeds to step S311.

  Step S310 is processing for setting the shooting scene to “sports”. For example, when shooting a moving subject, if the shutter speed is set to a low speed, the subject is blurred and a sharp image cannot be acquired. For this reason, when shooting a moving subject, the shutter speed at the time of shooting is set to a high speed, for example, according to the speed of the moving subject. For this reason, if the shutter speed is high, in other words, if the shutter speed is equal to or higher than a predetermined value, it can be estimated that a moving subject is captured. Thereby, the CPU 41 sets “sports” as a shooting scene for such an image.

  Step S311 is a process of setting the shooting scene to “others”. When the process proceeds to the determination in step S311, the determination in step S301, step S303, step S305, step S307, and step S309 described above is No, that is, none of the conditions is satisfied. Therefore, the CPU 41 sets “others” as a shooting scene for such an image.

  When a photographic scene is determined for each RAW image file, information on the determined photographic scene is written in the incidental information of the target RAW image file. In step S207, the RAW image file from which the shooting scene is determined is subjected to development processing under development conditions based on the shooting scene.

  In this way, when shooting is performed using the scene mode during shooting, development processing based on the shooting scene mode is executed, and even shooting without using the shooting scene mode is automatically shot. A scene is determined, and development processing based on the determined shooting scene is executed. According to this, it is possible to save the user from setting the optimum development condition while referring to the individual RAW image files and executing the development process.

  In the present embodiment, when executing the development process, the shooting scene for the RAW image file stored in the storage medium 37 is determined, and the development process is executed under the development conditions associated with the determined shooting mode. However, the timing for determining the shooting mode to be executed on the RAW image file is not limited to the timing at which the development process is executed. For example, when generating thumbnail image data to be collected as a RAW image file, a shooting scene at the time of shooting is specified by using the generated thumbnail image data and shooting conditions at the time of shooting. It is also possible to record a shooting scene as incidental information of a RAW image file.

  In the present embodiment, the shooting scene of the RAW image file is determined from any of the preset shooting scenes during the developing process for the raw image file that has not been developed yet. When it does not correspond to any of the shooting scenes, it is possible to notify that. As shown in FIG. 10, when it does not correspond to any of the shooting scenes, it is possible to display a screen (hereinafter referred to as a scene selection screen) 120 for allowing the user to select a shooting scene. For example, the scene selection screen 120 displays a corresponding image 124 in addition to a comment 121 “No suitable shooting scene found”, an item 122 for “automatic development”, and an item 123 for “select shooting scene”. To do. For example, when the “automatic development” item 122 is selected, the CPU 41 selects the most similar shooting scene. On the other hand, when the “shooting scene selection” item 123 is selected, although not shown, a list of shooting scenes to be set is displayed, and the user operates the setting operation unit 45 from the list of shooting scenes. The shooting scene may be selected by the above.

  In this embodiment, an example of a digital camera is taken, but the present invention is not limited to this. For example, the present invention can be applied to a mobile phone or a mobile terminal having a camera function. . In addition, a computer that can execute the functions of the scene determination unit 51, the condition setting unit 52, and the image processing circuit 35 in FIG. 1 and the processes in the flowcharts in FIGS. Furthermore, the program may be a program capable of executing the functions of the scene determination unit 51, the condition setting unit 52, and the image processing circuit 35 in FIG. 1 and the processes in the flowcharts in FIGS. In the case of such a program, the program is preferably stored in a computer-readable storage medium such as a memory card, an optical disk, or a magnetic disk.

  DESCRIPTION OF SYMBOLS 10 ... Digital camera, 35 ... Image processing circuit, 37 ... Storage medium, 41 ... CPU, 42 ... Built-in memory, 45 ... Setting operation part, 46 ... Scene mode dial, 51 ... Scene discrimination | determination part, 52 ... Condition setting part, 55 ... setting data, 56 ... preset setting data

Claims (6)

A first storage unit that stores a plurality of first image data obtained by performing at least A / D conversion on an image signal of a single color component captured at the time of shooting;
A setting unit capable of setting development conditions for a preset shooting scene;
A second storage unit that stores the development conditions set by the setting unit in association with the shooting scene;
A scene discriminating unit for discriminating a shooting scene when the first image data is acquired;
An image processing unit that applies development processing to each of the first image data stored in the first storage unit using development conditions corresponding to the shooting scene determined from the first image data;
An electronic camera characterized by comprising: The electronic camera according to claim 1,
The first image data is accompanied by shooting information indicating shooting conditions at the time of shooting,
The electronic camera according to claim 1, wherein the specifying unit determines the shooting scene when the first image data is acquired by referring to shooting information attached to the first image data. The electronic camera according to claim 1 or 2,
The image processing unit generates second image data by executing a development process using conditions different from the development conditions for the first image data,
The electronic camera characterized in that the scene discriminating unit discriminates the shooting scene when the first image data is acquired by analyzing the second image data. The electronic camera according to any one of claims 1 to 3,
A setting operation unit capable of setting and operating the shooting scene at the time of shooting,
The image processing unit performs development processing using development conditions based on the shooting scene on the first image data in which a shooting scene at the time of shooting is set by the setting operation unit. . The electronic camera according to any one of claims 1 to 4,
The first storage unit stores, in addition to the first image data, third image data that has been developed by the image processing unit. A first storage step of storing a plurality of intermediate image data obtained by performing at least A / D conversion on an image signal of a single color component captured at the time of photographing;
A setting step for setting development conditions for a preset shooting scene;
A second storage step of storing the development conditions set in the setting step in association with the shooting scene;
A determination step of determining a shooting scene when the first image data is acquired;
A development processing step of performing development processing on each of the first image data stored in the first storage step using a development condition corresponding to the shooting scene determined from the first image data;
A development processing program comprising:

Images