JP4383004B2 - Electronic camera - Google Patents

Description

[0001]
  The present invention is an electronic camera that records image data obtained by photographing and incidental information as one image file.LaRelated.
[0002]
[Prior art]
In general, in the shooting process of an electronic camera, a white balance process, a color conversion (saturation) process, or the like is performed after the captured image is A / D converted so that a better image (captured image) can be obtained. Various image processing is performed.
[0003]
For example, in the white balance processing, predetermined image processing is performed based on the imaged light source (illumination light) from the image processing parameters optimized for each light source such as sunlight, fluorescent light, and light bulb. A parameter is selected and set, and processing is performed using the image processing parameter. Alternatively, when a predetermined image processing parameter is designated (instructed) from among the image processing parameters according to the user's preference at the time of shooting, processing is performed using the designated image processing parameter.
[0004]
Similarly for other image processing, image processing parameters selected and set according to the captured scene from among a plurality of image processing parameters, and images set according to user instructions at the time of shooting Processing is performed using the processing parameters, and an image to be finally recorded on the recording medium is created.
[0005]
Actually, this image is compressed and recorded as a single image file on a recording medium (such as a memory card) together with accompanying information (information such as shooting date and shooting conditions), and the shooting process ends.
[0006]
[Problems to be solved by the invention]
By the way, conventionally, there has been no means for obtaining an image when a shooting process is performed by setting different image processing parameters in the shooting process after the shooting process is completed. Therefore, for example, after the image processing parameter of the fluorescent lamp is set and the photographing process is performed in the white balance process, the user performs the white balance process by setting the image processing parameter of the light bulb in the photographing process. In the case of requesting what kind of image would have been obtained, the request could not be answered.
[0007]
On the other hand, in Japanese Patent Laid-Open No. 11-282446, image processing methods such as gradation processing and compression processing differ from the captured image according to the assumed output characteristics (output characteristics of a monitor, a printer, etc.). An image processing method characterized by creating and recording a plurality of images has been proposed. According to this proposal, it becomes possible to obtain a plurality of images having different image processing methods after shooting. For this purpose, a plurality of images must be recorded, and the processing time is increased. The recording capacity required for the recording is enormous. Therefore, it is not a proposal that can be applied to an electronic camera, and it still cannot respond to the above-mentioned user's request.
[0008]
  In view of the above circumstances, an object of the present invention is to provide an electronic camera capable of obtaining an image when image processing is performed with different image processing parameters set in the shooting processing after the shooting processing.LaIs to provide.
[0009]
  First aspect of the present inventionIs an electronic camera that attaches supplementary information to image data obtained by photographing a scene and records it as a single image file on a recording medium, wherein the supplementary information includes image processing of at least one image processing item. Multiple required to runImage processingParametersImage processing means for executing image processing of the image processing item, a first recording mode for recording image data before execution of image processing by the image processing means, and execution of image processing by the image processing means Recording mode setting means for setting any of the second recording modes for recording the subsequent image data, and when the first recording mode is set by the recording mode setting means, Is a parameter group consisting of a plurality of image processing parameters necessary for executing image processing for each image processing item, one set corresponding to each of the image processing itemsAn electronic camera configured to be included.
[0010]
  According to the above configuration, for example, an image processing apparatus that performs image processing based on an image file or the like performs image processing performed in shooting processing based on parameters (image processing parameters) included in the incidental information of the image file. The same image processing can be executed.
Further, according to this configuration, when the first recording mode (for example, RAW mode) is set, image data (for example, RAW data) before execution of image processing is recorded on the recording medium as one image file together with the accompanying information. For example, an image processing apparatus that performs image processing based on an image file, for example, can execute image processing similar to the image processing performed in the imaging processing based on the parameters included in the supplementary information. Accordingly, it is possible to obtain an image when image processing is performed with different parameters set in the shooting process after the shooting process.
[0011]
  According to a second aspect of the present invention, in the first aspect, when the second recording mode is set by the recording mode setting means, the auxiliary information is set for each image processing item at the time of shooting. The image processing parameters are included, and the image processing means executes image processing using the set image processing parameters.
According to this configuration, when the second recording mode is set, the electronic camera uses a parameter set according to the captured scene and a parameter set according to an instruction from the user. Image processing.
  Third aspect of the present inventionIsAbove1Or 2 aspectsIn the configuration, the apparatus further includes first setting means for setting one parameter from among a plurality of parameters necessary for executing image processing of one image processing item according to the photographed scene. is there.
  According to this configuration, it is possible to automatically set parameters for each image processing item in accordance with the captured (captured) scene.
[0012]
  Fourth aspect of the present inventionIsThird aspect aboveIn the configuration, the supplementary information further includes a parameter set by the first setting means.
  According to this configuration, the incidental information can include parameters set according to the captured field, that is, parameters automatically set by the electronic camera at the time of shooting.
[0013]
  Fifth aspect of the present inventionIsAbove1Or 2 aspectsIn the configuration, the apparatus further includes second setting means for setting one parameter from among a plurality of parameters necessary for executing image processing of one image processing item in accordance with an instruction from the user.
  According to this configuration, the user can set parameters for each image processing item.
[0014]
  Sixth aspect of the present inventionIsThe fifth aspectIn the configuration, the auxiliary information further includes a parameter set by the second setting means.
  According to this configuration, the incidental information can include parameters set in accordance with an instruction from the user, that is, parameters set by the user at the time of shooting.
[0015]
  Seventh aspect of the present inventionIsAbove1, 2, 3, 4,5 or 6 aspectsThe image processing item includes at least one of gradation, white balance, sharpness, and saturation.
  According to this configuration, the image processing items include, for example, gradation, white balance, sharpness, saturation, and the like.
[0019]
Eighth aspect of the present inventionIsAbove1, 2, 3, 4, 5, 6,Or embodiment 7In the configuration, the auxiliary information further includes a plurality of parameters necessary for executing image processing for printing.
[0020]
According to this configuration, for example, a plurality of parameters necessary for executing image processing for printing, included in the supplementary information of the image file, by a printer device or the like that performs printing processing based on the image file. Based on this, the printing process can be executed.
[0021]
  Ninth aspect of the present inventionIsThe eighth aspectThe plurality of parameters necessary for executing image processing for printing include one or a plurality of print correction information obtained based on the set shooting mode and shooting conditions, and standard print correction information. , And uncorrected print correction information.
[0022]
  According to this configuration, for example, a printer device that performs a printing process based on an image file can execute the printing process based on the print correction information included in the accompanying information of the image file..
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram of an electronic camera included in an electronic camera system according to an embodiment of the present invention.
[0031]
In the drawing, the zoom lens system 1, the image sensor 2, the image pickup circuit 3, and an A / D (analog / digital) conversion circuit 4 constitute an image pickup unit. In the imaging unit, a subject image (field of view) formed by the zoom lens system 1 is photoelectrically converted (captured) by the imaging device 2, and an image signal that is the converted output is A / D via the imaging circuit 3. When input to the (analog-digital) conversion circuit 4, A / D conversion is performed there to obtain image data as digital data. Here, the lens provided in the zoom lens system 1 is driven by the lens drive unit 6 controlled by the lens drive control circuit 5 to adjust the focus of the subject image.
[0032]
A system controller (system controller) 7 is configured to include a CPU (central processing unit), controls each part of the electronic camera, and performs white balance processing and color conversion processing on the A / D converted image data. Various image processing such as these are performed. Also, processing for determining print correction information based on the shooting mode and shooting conditions is performed. The print correction information is a parameter necessary for executing image processing for printing.
[0033]
An ASIC (Application Specific Integrated Circuit) unit 8 performs image data compression / decompression processing, image data resizing processing, and the like according to the JPEG (Joint Photographic Experts Group) method.
The ROM 9 is a control program for causing the CPU provided in the syscon 7 to control each unit constituting the electronic camera, an image processing parameter for each image processing item performed by the electronic camera (described later in FIG. 2), a print This is a read-only memory in which a correction information determination table (described later in FIG. 3) and other calculation data necessary for various types of processing are stored.
[0034]
The RAM 10 is a random access memory used not only as a buffer memory for temporarily storing image data but also as a work storage area for various processes by the system controller 7.
The memory I / F (interface) 11 provides an interface function for exchanging data with the memory card 13 inserted into the card slot 12 and includes a semiconductor memory capable of reading and writing data. The image file (including image data and incidental information) is written to the memory card 13 configured as described above, or the image file is read from the memory card 13.
[0035]
The external I / F (interface) 14 provides an interface function for exchanging data with an external device connected to the external input / output terminal 15, such as a personal computer, an image processing device, or a printer device. Therefore, output of an image file or the like to an external device or input processing of an image file or the like from an external device is performed.
[0036]
The video memory 16 is a memory for temporarily storing image data for display obtained by image processing in the syscon 7, and this image data is then read from the video memory 16 and is output to the video output circuit 17. Is converted into an image signal which is a video signal. When this image signal is input to the image display LCD 18, an image is displayed. The image signal can also be sent to another device via the video out terminal 19.
[0037]
The strobe light emitting unit 20 is for causing the strobe to emit light when photographing using the strobe.
The operation unit 21 includes various keys, buttons, switches, and the like for transmitting various instructions received from the user to the system controller 7. For example, the user inputs a shooting mode instruction, a shooting condition instruction, a RAW mode instruction, a shooting start instruction (release). (By button). Note that the RAW mode is a mode in which image data is recorded without performing various image processes in the photographing process.
[0038]
The power supply unit 22 controls the voltage of the camera battery 23 or the voltage of power input to the external power supply terminal 24 to supply power to each unit of the electronic camera.
Note that the electronic camera having the above-described configuration may be configured to be connectable to a communication line, and an image file or the like may be exchanged via this communication line.
[0039]
Next, an image processing parameter and print correction information determination table for each image processing item stored in the ROM 9 will be described.
FIG. 2 is a table showing image processing parameters for each image processing item stored in the ROM 9. These image processing items are also photographing modes.
[0040]
As shown in the figure, each image processing item has a plurality of settings, and has an image processing parameter composed of a data length and the number of data corresponding to each setting. For example, the image processing item / contrast has three settings of low, standard, and high. When the standard is set in the photographing process, the image processing parameter corresponding to the standard has a data length of 8 bits and the number of data. Is selected, and the gradation table 2 is used to perform contrast (gradation conversion) processing.
[0041]
FIGS. 3A and 3B are diagrams showing a print correction information determination table stored in the ROM 9. FIG. 4A shows a correction mode selection table, and FIG. 4B shows a correction condition change table.
The correction mode selection table shown in FIG. 5A is a table for designating a correction mode (print correction information) based on the set shooting mode and shooting conditions. Each shooting mode (movie mode, scene mode, filter, strobe mode) and each shooting condition (scene brightness, subject distance, shutter speed, aperture, strobe, angle of view) In this case, one correction mode (any one of standard, portrait, landscape, sports, evening scene, night scene, backlight, macro, sepia, monochrome, and no correction) is designated for each setting. Each shooting mode and each shooting condition are given priorities.
[0042]
In this embodiment, from the correction mode selection table, one correction mode based on the highest priority order or the top two priority orders based on the priority order of the set shooting modes and shooting conditions. Two correction modes are specified. For example, in the shooting process, when the scene mode / sport (priority order: 1), filter / skin color (priority order: 2), and shutter speed / high speed (priority order: 5) are set, the scene mode with the highest priority order. / Correction mode instructed based on sports / One correction mode for sports, or the correction mode / sport and the next highest priority filter / correction mode instructed based on skin color / person The correction mode is designated.
[0043]
Also, the correction condition change table shown in FIG. 5B is a table for designating items (correction condition change, print correction information) that are not corrected based on the set shooting mode. As shown by the crosses in (b) in the figure, in each shooting mode (exposure mode, metering mode, exposure correction, contrast, saturation, white balance, sharpness, ISO sensitivity), one correction is made for each setting. An item not to be performed (one of brightness, contrast, white balance, saturation, and sharpness) is instructed. However, no item is instructed for items not marked with a cross.
[0044]
In the present embodiment, items for which correction is not performed are specified from the correction condition change table based on the set shooting mode. For example, when exposure correction / + 1 step, contrast / high, and white balance / sunlight are set in the shooting process, the brightness, contrast, and white balance that are instructed based on them are not corrected (correction) Condition change).
[0045]
Next, the configuration of an image processing apparatus with a printing function (hereinafter simply referred to as a printer apparatus) included in the electronic camera system will be described.
FIG. 4 is a block diagram of the printer apparatus. The printer apparatus shown in the figure is a sublimation type thermal transfer type printer apparatus that uses, for example, an ink ribbon made of Y (yellow), M (magenta), and C (cyan), and prints on a sheet by a surface sequential method. is there.
[0046]
In the figure, a system controller (system controller) 31 includes a CPU (central processing unit), controls each part of the printer device, and performs various operations such as white balance processing and color conversion processing on image data. Perform image processing. This image processing is the same as the image processing performed in the photographing process of the electronic camera. In addition, various image quality correction processes are performed to correct image brightness / saturation / saturation, hue, and the like based on image data during printing (automatic image quality correction process).
[0047]
An ASIC (Application Specific Integrated Circuit) unit 32 performs image data compression / decompression processing, image data resizing processing, and the like according to the JPEG (Joint Photographic Experts Group) method.
The memory I / F (interface) 33 provides an interface function for transferring data to and from the memory card 35 inserted into the card slot 34, and includes a semiconductor memory capable of reading and writing data. The image file is written into the memory card 35 configured as described above, or the image file is read out from the memory card 35.
[0048]
The RAM 36 is a random access memory used not only as a buffer memory for temporarily storing image data but also as a work storage area for various processes by the system controller 31.
The ROM 37 is a read-only memory in which a control program for causing the CPU included in the system controller 31 to control each unit constituting the printer device, and calculation data necessary for various processes are stored. It is.
[0049]
The external I / F (interface) 38 provides an interface function for exchanging data with a personal computer connected to the PC connection terminal 39, and outputs an image file or the like to the personal computer. Alternatively, input processing such as an image file from a personal computer is performed.
[0050]
The video memory 50 is a memory for temporarily storing image data for display obtained by image processing in the syscon 31. This image data is then read from the video memory 50 and is output to the video output circuit 51. Is converted into an image signal which is a video signal. When this image signal is input to the image display LCD 52, an image is displayed. The image signal can also be sent to another device via the video-out terminal 53.
[0051]
The thermal head control unit 40 reads image data for printing obtained by various image processing such as automatic image quality correction processing in the syscon 31 for each line data, and drives (heats) the thermal head 41 based on this. Thus, printing is performed by sublimating and absorbing the dye of the ink ribbon 43 on the paper 42.
[0052]
The paper transport control circuit 44 controls the paper transport unit 45 to correspond to the sequential application of each ink so that the Y, M, and C ink ribbons 43 are overlaid. The paper 42 is transported.
The operation unit 47 includes various keys, buttons, switches, and the like for transmitting various instructions received from the user to the syscon 31. For example, the user selects an image selection instruction (using a cross key or the like), an image processing instruction, and a print instruction (printing). (By button).
[0053]
The power supply unit 48 controls the voltage of the power input to the external power supply terminal 49 to supply power to each unit constituting this printer apparatus.
Note that the printer apparatus having the above-described configuration may be configured such that an image file or the like is directly exchanged with an external apparatus such as an electronic camera via a cable or the like. Further, it may be configured to be connectable to a communication line, and an image file or the like may be exchanged via this communication line.
[0054]
Next, an operation process of the electronic camera and printer apparatus having the above-described configuration included in the electronic camera system will be described. Here, in particular, a description will be given focusing on processing performed to obtain an image when image processing is performed with different image processing parameters set in the shooting processing after the shooting processing.
[0055]
FIG. 5 is a flowchart illustrating an example of photographing processing performed by the electronic camera. Note that the processing shown in the figure is processing performed by the system controller 7 executing a control program stored in the ROM 9.
As shown in the figure, first, until a shooting instruction (release button on) from the user is received via the operation unit 21 (step (hereinafter simply referred to as S) 507 is N), a shooting mode instruction (from the user) ( S501), an imaging condition instruction (S503), and a RAW mode instruction (S505) are accepted. When a shooting mode instruction (Y in S501), a shooting condition instruction (Y in S503), or a RAW mode instruction (Y in S505) is received from the user, the shooting mode (S502) and shooting conditions (S504) according to the instructions are received. , RAW mode (S506) is set.
[0056]
When a shooting instruction (release button on) is received from the user (S507 is Y), based on the shooting mode and shooting conditions set according to the above-described instruction from the user and the object scene to be captured. The imaging process is performed (S508). In this imaging process, a subject image (field of view) formed by the zoom lens system 1 is photoelectrically converted (captured) by the imaging device 2, and an image signal that is the converted output is A / A via the imaging circuit 3. The digital data image data (RAW data) input to the D conversion circuit 4 and obtained by the A / D conversion is stored in the RAM 10.
[0057]
Subsequently, print correction information creation processing is performed based on the set shooting mode and shooting conditions (S509). This process determines print correction information based on the set shooting mode and shooting conditions from the correction mode selection table (see FIG. 3A) and the correction condition change table (see FIG. 3B). It is a process to create. However, when the RAW mode is set, two print correction information of the first candidate (mode 1) and the second candidate (mode 2) are created, and when the RAW mode is not set, the first candidate (mode 1) is created. ) Only print correction information. This print correction information will be described later with reference to FIGS. 6 (a) and 6 (b).
[0058]
Subsequently, an image (captured scene image) based on the image data (RAW data) stored in the RAM 10 is analyzed, and an image processing parameter for each image processing item at the time of shooting is set based on the analysis result. (S510). However, when a predetermined setting has already been performed according to the shooting mode instruction from the user, an image processing parameter corresponding to the setting is set. For example, when the saturation, which is one of the shooting modes, is set to the standard by the user, the color conversion matrix 2 corresponding to the standard is set as the image processing parameter for the saturation. As described above, the image processing parameter for each image processing item at the time of shooting is set according to the shot scene and the instruction from the user.
[0059]
Subsequently, it is determined whether or not the RAW mode is set (S511). When the RAW mode is set (S511 is Y), the image processing of S513 to S516 and the compression processing of S517 are not performed and the image is processed. The supplementary information is attached to the data (RAW data) and recorded as one image file on the memory card (S512). However, the incidental information at this time includes a plurality of parameter groups each including a plurality of parameters necessary for executing image processing of one image processing item, and includes four print correction information and the like. Is included. The file structure of the image file recorded at this time will be described later with reference to FIG.
[0060]
On the other hand, when the RAW mode is not set (N in S511), the image processing of S513 to S516 is performed using the image processing parameters for each image processing item at the time of shooting set in the processing of S510 described above. . That is, AWB (auto white balance) processing is performed on the image data (RAW data) using the set gain (S513), and then color conversion (saturation) processing is performed using the set color conversion matrix. (S514), gradation conversion (contrast) processing is performed using the next set gradation table (S515), and edge enhancement (sharpness) processing is performed using the next set intensity (S514). S516).
[0061]
Subsequently, JPEG compression processing by the ASIC unit 8 is performed on the image data subjected to these image processing (S517), and additional information is attached to the compressed image data and recorded as one image file on the memory card. (S512). The file structure of the image file recorded at this time will be described later with reference to FIG.
[0062]
When shooting is performed in such a shooting process with the RAW mode set, a plurality of images required to execute image processing of at least one image processing item on the image data (RAW data) before the image processing is performed. Attached information including a plurality of sets of parameters consisting of these parameters is added to each image processing item, and is recorded on the memory card as one image file.
[0063]
  Next, the aforementioned S509The print correction information created by the process will be described. FIG. 6 (a) is a table showing data (print correction information) corresponding to each correction mode and an item (correction condition change) for which each correction is not performed, and FIG. 6 (b) is the created print correction. It is an example of information.
[0064]
The print correction information is based on the upper 4-bit data indicating the correction mode (see the correction mode selection table in FIG. 3A) designated based on the set shooting mode and shooting conditions, and the set shooting mode. It consists of lower 5 bits of data indicating items that are not subjected to the specified correction (see the correction condition change table in FIG. 3B).
[0065]
That is, the upper 4 bits of the print correction information are constituted by the data shown in FIG. 6A corresponding to the designated correction mode, and the lower 5 bits thereof correspond to items for which the designated correction is not performed. It consists of the logical OR of the data shown in a).
[0066]
For example, the print correction information that is created when landscape is specified as the correction mode and brightness and white balance are specified as items that are not to be corrected is based on the specified correction mode from the table shown in Fig. The upper 4 bits are composed of 0010 corresponding to the landscape, and the items not subjected to the specified correction are brightness and white balance, and the lower 5 bits are 10000 (brightness) and 00100 (white balance). ), Which is 10100, which is the logical sum of 001010100, as shown in FIG.
[0067]
  However, S50 in FIG.9The first candidate print correction information (mode 1) described in the above processing is designated based on the correction mode indicated by the upper 4 bits based on the highest priority among the set shooting modes and shooting conditions. Print correction information when the correction mode is set. The second candidate print correction information (mode 2) is print correction information when the correction mode is designated based on the set shooting mode and shooting conditions based on the second priority. .
[0068]
Next, the file structure of the image file recorded on the memory card in the process of S512 in FIG. 5 will be described.
FIG. 7A shows an example of the file structure (RAW file format) of an image file recorded when the RAW mode is set, and FIG. 7B shows the case when the RAW mode is not set. 2 is an example of a file structure (other than a RAW file format) of an image file recorded in the file.
[0069]
As shown in FIG. 5A, the file structure of the image file recorded when the RAW mode is set includes a file identifier, an image size, 13 types of image processing parameters, and image processing parameters set at the time of shooting. , Print correction identifiers, incidental information including four types of print correction information, and image data.
[0070]
The file identifier indicates that the image file is an image file recorded when the RAW mode is set (in the RAW file format), and is represented by a fixed value of 2 bytes.
The image size indicates the width and height of the image and is represented by 2 bytes.
[0071]
The 13 types of image processing parameters indicate all the image processing parameters for each image processing item performed in the photographing process, and are composed of a plurality of image processing parameters necessary for executing image processing of one image processing item. Four sets of parameters are included for each image processing item. The image processing parameters are 1024 bytes for the gradation tables 1, 2, and 3, 18 bytes for the color conversion matrices 1, 2, and 3, 4 bytes for the gains 1, 2, 3, and 4, and intensity 1, 2, 3 Are each represented by 2 bytes.
[0072]
The image processing parameter set at the time of shooting indicates the data name of the image processing parameter for each image processing item set in the processing of S510 in FIG. 5, and is represented by 1 byte. Actually, the data name of the image processing parameter of each image processing item is shown for every 2 bits from the top of the 1 byte (8 bits). For example, the most significant 2 bit data is the data name of the contrast image processing parameter, the next 2 bit data is the data name of the saturation image processing parameter, the next 2 bit data is the data name of the white balance image processing parameter, The final 2-bit data indicates the data name of the sharpness image processing parameter.
[0073]
The print correction identifier indicates that the image file is an image file including four pieces of print correction information, and is represented by a fixed value of 2 bytes.
The four types of print correction information include print correction information for the first candidate (mode 1), print correction information for the second candidate (mode 2), print correction information with a standard correction mode (standard: 0), and a correction mode of This indicates print correction information without correction (no correction: 320), each represented by 2 bytes. These print correction information are a plurality of parameters necessary for executing image processing for printing.
[0074]
The image data indicates RAW data (RGB RAW data) and is represented by width × height × 3 bytes.
In addition, the incidental information may include a shooting condition or a shooting date set at the time of shooting.
[0075]
As shown in FIG. 7B, the file structure of the image file recorded when the RAW mode is not set includes a file identifier, an image size, four types of image processing parameters, a print correction identifier, and It consists of incidental information including print correction information and image data.
[0076]
The file identifier indicates that the image file is an image file recorded when the RAW mode is not set (other than the RAW file format), and is represented by a fixed value of 2 bytes.
The image size indicates the width and height of the image and is represented by 2 bytes.
[0077]
The four types of image processing parameters are the image processing parameters set at the time of shooting set in the processing of S510 in FIG. 5, and in FIG. 7B, gradations are set as image processing parameters set at the time of shooting. An example is shown in which table 2, color conversion matrix 1, gain 1, and intensity 3 are set.
[0078]
The print correction identifier indicates that the image file is an image file including one piece of print correction information, and is represented by a fixed value of 2 bytes.
The print correction information indicates the first candidate print correction information (mode 1), and is represented by 2 bytes.
[0079]
The image data indicates the image data that has been subjected to the JPEG compression process in S517 of FIG. 5, and is represented by a data size that depends on the image data.
In addition, the incidental information may include a set shooting condition, a shooting date, and the like.
[0080]
Next, image processing and printing processing based on an image file performed by the printer apparatus will be described. These processes are processes performed by the system controller 31 executing a control program stored in the ROM 37.
FIG. 8 is a flowchart illustrating an example of image processing performed by the printer apparatus. However, in the flow shown in the figure, an image based on an image file in the RAW file format is sent in accordance with an instruction from the user in a state where a memory card in which an image file in the RAW file format is recorded is installed in the card slot 34. This processing is executed when an image processing instruction is issued. Accordingly, this flow is not executed when an image processing instruction is performed on an image based on an image file other than the RAW file format. This image processing instruction is requested by the user, for example, what kind of image would have been obtained when image processing was performed with different image processing parameters set in the shooting processing after the shooting processing by the electronic camera. This is done at the time.
[0081]
As shown in the figure, first, an RAW file format image file instructed by the user is read from the memory card and opened (S801).
Subsequently, incidental information (header information) and image data (RAW data) are read from the image file, the image data is resized, and a reduced image of 160 × 120 pixels is created (S802, S803).
[0082]
Subsequently, processing is performed to allow the user to select image processing parameters (image processing parameters for each image processing item) used in the image processing of S814 to S817 according to preference (S804 to 811). Note that the image processing in S814 to S817 is the same as the image processing (S513 to S516 in FIG. 5) performed in the shooting processing, so the image processing parameters used in each of the image processing in S814 to S817 are set according to preference. By allowing the user to make a selection, the user's request can be answered.
[0083]
Specifically, first, in order to allow the user to select an image processing parameter for white balance (WB) processing, four image processing parameters (gain 1) for white balance processing included in the accompanying information are included in the above-described reduced image. 2, 3, 4) are used to create four reduced processed images that have undergone white balance processing (S <b> 804).
[0084]
Subsequently, color conversion (saturation) processing (S806) and gradation conversion (contrast) processing (for each of the four reduced processing images based on the image processing parameters set at the time of shooting included in the supplementary information ( In step S807, edge enhancement (sharpness) processing (S808) is performed, and the four reduced processing images subjected to these processing are collectively displayed on the image display LCD 52 (S808).
[0085]
Subsequently, an image selection instruction from the user is received via the operation unit 47 (S809), and when a predetermined reduced processing image is selected from the four reduced processing images displayed at once (Y in S809), The image processing parameter for white balance processing corresponding to the selected reduced processing image is selected (set) as the image processing parameter used in the white balance processing in S814.
[0086]
In other words, the four reduced processing images displayed in a batch are different only in the image processing parameters of the white balance processing, and the image processing parameters of the other color conversion processing, gradation processing, and edge enhancement processing are the same. Image processing parameters) are used to perform image processing. Accordingly, when the user selects a desired reduced processing image from among the four reduced processing images, the image processing parameters for white balance processing corresponding to the selected reduced processing image are selected.
[0087]
At this point, image processing items (saturation, contrast, sharpness) for which no image processing parameter has been selected still remain (S810: N). Next, an image processing item for the image processing parameter to be selected by the user is selected. The saturation is changed (S811), and the process returns to S804.
[0088]
However, since the image processing parameters of the white balance processing have already been selected at this time, in the processing of S804, white balance processing is performed on the reduced image obtained by the processing of S803 using the selected image processing parameters. One reduced image is created.
[0089]
Subsequently, the reduced image is subjected to color conversion processing using each of the three image processing parameters (color conversion matrices 1, 2, 3) of color conversion (saturation) processing included in the supplementary information. Three reduced images are created (S805).
Subsequently, gradation conversion processing (S806) and edge enhancement processing (S807) are performed on each of the three reduced processing images based on the image processing parameters set at the time of shooting included in the supplementary information. The three reduced processed images that have been processed are collectively displayed on the image display LCD 52 (S808).
[0090]
Subsequently, an image selection instruction from the user is accepted via the operation unit 47 (S809), and when a predetermined reduced processing image is selected from the three reduced processing images displayed at once (Y in S809), The image processing parameter of the color conversion process corresponding to the selected reduced image is selected (set) as the image processing parameter used in the color conversion process of S815.
[0091]
Even at this point, image processing items (contrast and sharpness) for which no image processing parameter has been selected still remain (S810: N), and the image processing parameter of the image processing parameter to be selected by the user is then changed to contrast. (S811), the process returns to S804 again.
[0092]
However, since the image processing parameters for the white balance process and the color conversion process have already been selected at this time, the selected image processing parameters are used for the reduced image obtained in the process of S803 in the processes of S804 and S805. Then, white balance processing and color conversion processing are performed to create one reduced processed image.
[0093]
Subsequently, the reduced image is subjected to gradation conversion processing using each of the three image processing parameters (gradation tables 1, 2, 3) of gradation conversion (contrast) processing included in the accompanying information. The three reduced processed images are created (S806).
Subsequently, edge enhancement processing (S807) is performed on each of the three reduced processing images based on the image processing parameters set at the time of shooting included in the supplementary information, and the three reduction processings in which this processing has been performed are performed. The images are collectively displayed on the image display LCD 52 (S808).
[0094]
Subsequently, an image selection instruction from the user is accepted via the operation unit 47 (S809), and when a predetermined reduced processing image is selected from the three reduced processing images displayed at once (Y in S809), The image processing parameter of the gradation conversion process corresponding to the selected reduced image is selected (set) as the image processing parameter used in the gradation conversion process of S816.
[0095]
At this point in time, image processing items (sharpness) for which no image processing parameter has been selected still remain (N in S810). Next, the image processing item of the image processing parameter to be selected by the user is changed to sharpness ( S811), the process returns to S804 again.
[0096]
However, since the image processing parameters for white balance processing, color conversion processing, and gradation conversion processing have already been selected at this time, in the processing in S804 to S806, the selected image is added to the reduced image obtained in S803. Using the processing parameters, white balance processing, color conversion processing, and gradation conversion processing are performed to create one reduced processing image.
[0097]
Subsequently, the reduced image is subjected to edge enhancement processing using each of the three image processing parameters (intensities 1, 2, 3) of edge enhancement (sharpness) processing included in the accompanying information. Reduction-processed images are created (S807), and these are collectively displayed on the image display LCD 52 (S808).
[0098]
Subsequently, an image selection instruction from the user is accepted via the operation unit 47 (S809), and when a predetermined reduced processing image is selected from the three reduced processing images displayed at once (Y in S809), The image processing parameter for edge enhancement processing corresponding to the selected reduced processing image is selected (set) as the image processing parameter used in the edge enhancement processing in S817.
[0099]
When all the image processing parameters for each image processing item are selected in this way (Y in S810), the image data (RAW data) of the image file is read again (S812) and the file is closed (S813). .
Subsequently, using the image processing parameters for each image processing item selected by the user for the read image data (full size), white balance (AW) processing (S814), color conversion (saturation) processing (S815). ), Gradation conversion (contrast) processing (S816), and edge enhancement (sharpness) processing (S817), and an image based on the image data subjected to these processings is displayed on the image display LCD 52 (S818). Note that the image data at this time may be recorded on the memory card in accordance with an instruction from the user.
[0100]
By such processing, it is possible to obtain an image when image processing is performed with different image processing parameters set in the shooting processing after the shooting processing. Therefore, the above-mentioned user's request can be answered.
Subsequently, a print instruction from the user is received via the operation unit 47 (S819). When a print instruction is received (S819 is Y), the process proceeds to print processing described later with reference to FIG.
[0101]
In the present flow, the reduction processing image display (S808) and image display (S818) may be displayed on a PC display or the like via the PC connection terminal 39, and the video out terminal 53 may be displayed. It may be displayed on another display device. Further, the order of image processing parameters to be selected by the user is not limited to the order of white balance, saturation, contrast, and sharpness.
[0102]
FIG. 9 is a diagram showing a display example of reduced processing images that are collectively displayed on the image display LCD 52 in the processing of S808. This figure shows, as an example, a display screen displayed when the user selects an image processing parameter for contrast (gradation conversion processing).
[0103]
As shown in the figure, the upper left is the reduced image based on the gradation table 1, the upper right is the reduced image based on the gradation table 2, and the lower left is the reduced image based on the gradation table 3. In this way, the reduced processing images displayed in a batch are regularly arranged in order to make it easier for the user to confirm the difference due to the difference in the image processing parameters.
[0104]
Further, as a reference when the user selects an image, a star is displayed below the reduced processing image based on the same image processing parameter as the image processing parameter set at the time of shooting. This is the case in the lower left image. That is, it can be seen that the gradation table 3 was set as a contrast image processing parameter at the time of photographing. A selection frame in the figure indicates a selection target when the user selects an image, and is moved by a cross key.
[0105]
Although display examples of other image processing items are not shown, the reduced processing images displayed in a batch are regularly arranged in order as in the above display examples, and image processing set at the time of shooting is performed. In the reduced processed image based on the same image processing parameter as the parameter, an asterisk is displayed below it.
[0106]
Next, print processing performed by the printer apparatus will be described. In this print processing, when a plurality of print correction information is included in the incidental information of the image file to be printed, a favorite image is selected from the plurality of images processed based on each print correction information. The selected image is printed.
[0107]
FIG. 10 is a flowchart showing an example of this print processing.
As shown in the figure, when there is a print instruction for an image of a predetermined image file, the print correction identifier is read from the accompanying information of the image file, and the number of print correction information is determined, The print correction information is read (S1001). However, here, the image of the image file to be printed will be described as an image displayed by the processing of S818 in FIG. Therefore, in the process of S1001, the number of print correction information is determined to be four, and the first candidate print correction information (mode 1) and the second candidate print correction information (mode 2) are the four print correction information. Standard print correction information (: 0) and uncorrected print correction information (: 320) are read out.
[0108]
Subsequently, image analysis of the image (image data) displayed in the processing of S818 in FIG. 8 is performed (S1002), and processing is performed based on each print correction information based on the analysis result and the read four print correction information. A process of causing the user to select a favorite image from the four images thus performed is performed (S1003 to SS1012).
[0109]
Specifically, first, an image quality correction amount is calculated based on the print correction information of the first candidate and the above-described image analysis result (S1003). Specifically, based on the correction mode and the image analysis result indicated in the print correction information of the first candidate, the image quality correction amount in the subsequent contrast correction processing, the image quality correction amount in the brightness correction processing, and the white balance correction processing The image quality correction amount, the image quality correction amount in the saturation correction processing, and the image quality correction amount in the sharpness correction processing are calculated.
[0110]
Subsequently, based on the calculated image quality correction amounts, contrast correction processing (S1004), brightness correction processing (S1005), white balance correction processing (S1006), saturation correction processing (S1007), and sharpness correction processing (S1008). I do. However, if an item for which correction is not performed (correction change condition) is indicated in the print correction information of the first candidate, the correction processing for that item is skipped.
[0111]
In this way, when an image processed based on the print correction information of the first candidate is created, it is displayed on the image display LCD 52 (S1009).
Such processing is similarly performed for the second candidate print correction information (mode 2), standard print correction information, and uncorrected print correction information, and the processing is performed based on each print correction information 4. When one image is displayed on the image display LCD 52 (Y in S1010), next, an image selection instruction from the user is received via the operation unit 47 (S1012), and the four images displayed on the image display LCD 52 are selected. When a predetermined image is selected (S1012 is Y), the selected image is actually printed on a sheet (S1013), and the flow ends.
[0112]
By such processing, it becomes possible to print an image according to the user's preference. In the present embodiment, the electronic camera may perform the processing up to S818 of the image processing shown in FIG.
[0113]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to obtain an image when image processing is performed with different image processing parameters set in the shooting processing after the shooting processing.
[Brief description of the drawings]
FIG. 1 is a block diagram of an electronic camera included in an electronic camera system according to an embodiment of the present invention.
FIG. 2 is a table showing image processing parameters for each image processing item stored in a ROM.
3A is a correction mode selection table, and FIG. 3B is a correction condition change table.
FIG. 4 is a block diagram of an image processing apparatus (printer apparatus) with a printing function included in the electronic camera system according to the embodiment of the present invention.
FIG. 5 is a flowchart illustrating an example of photographing processing performed by the electronic camera.
6A is a table showing data (print correction information) corresponding to each correction mode and an item (correction condition change) for which each correction is not performed, and FIG. 6B is an example of created print correction information. is there.
7A is an example of a file structure (RAW file format) of an image file recorded when the RAW mode is set, and FIG. 7B is a record when the RAW mode is not set. It is an example of the file structure (other than RAW file format) of an image file.
FIG. 8 is a flowchart illustrating an example of image processing performed by the printer apparatus.
FIG. 9 is a display example of reduced processing images collectively displayed on the image display LCD 52;
FIG. 10 is a flowchart illustrating an example of print processing performed by the printer apparatus.
[Explanation of symbols]
1 Zoom lens system
2 Image sensor
3 Imaging circuit
4 A / D
5 Lens drive control circuit
6 Lens drive unit
7 Syscon
8 ASIC
9 ROM
10 RAM
11 Memory I / F
12 card slots
13 Memory card
14 External I / F
15 External input / output terminal
16 Video memory
17 Video output circuit
18 Image display LCD
19 Video out terminal
20 Strobe flash unit
21 Operation unit
22 Power supply
23 Camera battery
24 External power input terminal
31 Syscon
32 ASIC
33 Memory I / F
34 Card slot
35 Memory card
36 RAM
37 ROM
38 External I / F
39 PC connection terminal
40 Thermal head controller
41 Thermal head
42 paper
43 Ink Ribbon
44 Paper transport controller
45 Paper transport section
46 Paper cartridge
47 Operation unit
48 Power supply
49 External power input terminal
50 video memory
51 Video output circuit
52 Image display LCD
53 Video out terminal

Claims (9)

An electronic camera for recording on a recording medium as a single image file by adding incidental information to image data obtained by photographing a scene,
The incidental information includes a plurality of image processing parameters necessary for executing image processing of at least one image processing item ,
Image processing means for executing image processing of the image processing item;
Recording mode setting for setting one of a first recording mode for recording image data before execution of image processing by the image processing means and a second recording mode for recording image data after execution of image processing by the image processing means Means,
Further comprising
When the first recording mode is set by the recording mode setting unit, the auxiliary information includes a parameter group including a plurality of image processing parameters necessary for executing image processing for each image processing item. One set is included corresponding to each of the image processing items ,
An electronic camera characterized by that. When the second recording mode is set by the recording mode setting means, the auxiliary information includes an image processing parameter set for each image processing item at the time of shooting,
The image processing means executes image processing using the set image processing parameters ;
The electronic camera according to claim 1 . A first setting means for setting one parameter from a plurality of parameters necessary for executing image processing of one image processing item in accordance with the captured scene;
Furthermore according to claim 1 or 2 electronic camera according to comprising the. The incidental information further includes a parameter set by the first setting means.
The electronic camera according to claim 3 . A second setting means for setting one parameter from a plurality of parameters necessary for executing image processing of one image processing item in accordance with an instruction from the user;
Furthermore according to claim 1 or 2 electronic camera according to comprising the. The incidental information further includes a parameter set by the second setting means.
The electronic camera according to claim 5 . The image processing item includes at least one of gradation, white balance, sharpness, and saturation.
The electronic camera according to claim 1, 2, 3, 4, 5, or 6 . The auxiliary information further includes a plurality of parameters necessary for executing image processing for printing.
The electronic camera according to claim 1, 2, 3, 4, 5, 6, or 7 . The plurality of parameters necessary for executing the image processing for printing include one or a plurality of print correction information obtained based on the set shooting mode and shooting conditions, standard print correction information, and Contains print correction information without correction,
The electronic camera according to claim 8 .

Images