JP2018019122A - Image data processor and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image data processor configured for a print/display device to selectively print/display images each having a gradation characteristic or a color space characteristic suitable for respective dynamic ranges by storing a plurality of image data with different gradation characteristics in one image file.SOLUTION: The image data processor stores and records, in one file, first image data with a first gradation characteristic or color space characteristic and second image data with a second gradation characteristic or color space characteristic different from the first gradation characteristic or color space characteristic.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to an image data processing apparatus and an imaging apparatus that record an image file that stores a plurality of image data having different gradation characteristics in one file.

  Patent Document 1 discloses a digital still camera (hereinafter referred to as “digital camera”) that generates an image file capable of storing a plurality of images in one file.

  This digital camera generates display image data (eg, horizontal 1920 pixels × vertical 1080 pixels) from captured image data (eg, horizontal 6000 pixels × vertical 4000 pixels). The image data for display has the number of pixels of a high-definition television. This digital camera manages captured image data and display image data in the same image file.

  As a result, the digital camera can store and record image data composed of all pixels of the captured image and image data for display on a high-definition television in one file.

International Publication No. 2009/066471

  According to Patent Document 1 described above, there is an advantage that an image can be displayed quickly by storing a plurality of image data matching the number of pixels of each display device in an image file. On the other hand, in devices having different printing / display dynamic ranges, such as printers and televisions, the gradation characteristics of images to be printed / displayed are the same, and images suitable for each printing / display device cannot be printed / displayed.

  The present disclosure has been made in consideration of the above-described problem. By storing a plurality of pieces of image data having different gradation characteristics in one image file, the printing / display apparatus is suitable for each dynamic range. An object of the present invention is to provide an image data processing apparatus capable of printing / displaying an image having gradation characteristics.

  An image data processing apparatus according to the present disclosure includes a unit that generates first image data having a first gradation characteristic, and second image data having a second gradation characteristic different from the first gradation characteristic. And means for storing the first image data and the second image data in one image file.

  The image data processing apparatus according to the present disclosure can store a plurality of image data having different gradation characteristics in one file.

1 is a block diagram illustrating a configuration of a digital camera in Embodiment 1. Rear view of the digital camera according to Embodiment 1 Data structure diagram of image file in Embodiment 1 Schematic diagram of management table T10 in the first embodiment Flowchart of recording operation in the first embodiment Flowchart of reproduction operation in the first embodiment Data structure diagram of image file in other embodiment Data structure diagram of image file in other embodiment

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, as an image data processing apparatus, an imaging apparatus (digital camera) will be described as an example with reference to the drawings.

[1. Constitution〕
[1-1. Electrical configuration of digital camera)
FIG. 1 is a block diagram illustrating a configuration of the digital camera 101 according to the first embodiment of the present disclosure. The digital camera 101 captures the subject image formed by the optical system 120 with the image sensor 141. The image data generated by the image sensor 141 is subjected to various processes by the image processing unit 160 and stored in the memory card 108 or the built-in memory 109. The image data stored in the memory card 108 or the like can be displayed on the liquid crystal monitor 110. Hereinafter, the configuration of the digital camera 101 will be described in detail.

  The optical system 120 includes an objective lens 121, a zoom lens 122, a diaphragm 123, an OIS unit 124, and a focus lens 125. The optical system 120 collects light from the subject and forms a subject image.

  The objective lens 121 is a lens arranged closest to the subject. The zoom lens 122 can enlarge or reduce the subject image by moving along the optical axis of the optical system 120. The diaphragm 123 adjusts the amount of light transmitted through the optical system 120 by adjusting the size of the opening according to the setting of the user or automatically. The OIS unit 124 includes a correction lens that can move in a plane perpendicular to the optical axis. The OIS unit 124 reduces the blur of the subject image by driving the correction lens in a direction that cancels the blur of the digital camera 101. The focus lens 125 adjusts the focus of the subject image by moving along the optical axis of the optical system 120.

  The drive system 130 drives each optical element in the optical system 120.

  The zoom motor 132 drives the zoom lens 122 along the optical axis of the optical system 120. The zoom motor 132 may drive the zoom lens 122 via a mechanism such as a cam mechanism or a ball screw. The zoom motor 132 may be realized by a pulse motor, a DC motor, a linear motor, a servo motor, or the like.

  The diaphragm actuator 133 is a drive unit for changing the size of the opening of the diaphragm 123. The aperture actuator 133 can be realized by a motor or the like.

  The OIS actuator 134 drives the correction lens in the OIS unit 124 in a plane perpendicular to the optical axis. The OIS actuator 134 can be realized by a planar coil or an ultrasonic motor.

  The focus motor 135 drives the focus lens 125 along the optical axis of the optical system 120. The focus motor 135 may drive the focus lens 125 via a mechanism such as a cam mechanism or a ball screw. The focus motor 135 may be realized by a pulse motor, a DC motor, a linear motor, a servo motor, or the like. Further, the focus motor 135 may be omitted, and the zoom motor 132 may be used as a driving unit that drives the zoom lens 122 and the focus lens 125.

  The image sensor 141 captures the subject image formed by the optical system 120 and generates image data. The timing generator 142 generates a timing signal for driving the image sensor 141. The image sensor 141 performs various operations such as exposure, transfer, and electronic shutter according to the timing signal generated by the timing generator 142. The AD converter 105 converts the image data generated by the image sensor 141 into a digital signal.

  The image processing unit 160 performs various processes on the image data converted by the AD converter 105. The image processing unit 160 processes the image data generated by the image sensor 141 to generate image data to be recorded on the memory card 108 or to generate image data to be displayed on the liquid crystal monitor 110. Or In addition, the image processing unit 160 performs processing on the image data stored in the memory card 108 to generate image data to be displayed on the liquid crystal monitor 110 and to store the image data in the memory card 108 again. Or image data to be transmitted to an external device via the communication unit 111. In addition, the image processing unit 160 generates a single image data by combining a plurality of image data with different brightness and darkness, which is obtained by imaging the same scene by changing the aperture diameter of the diaphragm 123. The image processing unit 160 can be realized by a DSP or a microcomputer.

  The preprocessing unit 161 performs various image processing such as gamma correction, white balance correction, and flaw correction on the image data converted by the AD converter 105. The YC conversion unit 162 converts image data expressed in RGB into image data expressed in a YC (Y: luminance signal, C: color difference signal) signal.

  The electronic zoom processing unit 165 electronically enlarges or reduces the image data. At that time, the electronic zoom processing unit 165 appropriately executes processes such as a part of the image data clipping process, a thinning process, and an interpolation process on the image data. In short, the electronic zoom processing unit 165 is means for converting the number of pixels of the image data.

  The compression unit 163 compresses image data expressed in YC by performing DCT (Discrete Cosine Transform), Huffman coding, and the like. For example, the compression unit 163 compresses the image data in a compression format compliant with the JPEG standard. The compression format may be HEVC intraframe compression (HEVC-i), which is a compression format for moving images, as still image data. That is, it is not limited to JPEG format image data.

  When the compressed image data stored in the memory card 108 is reproduced on the liquid crystal monitor 110, the decompression unit 164 decodes the image data into an uncompressed state.

  The controller 150 is a control unit that controls the entire digital camera 101. The controller 150 can be realized by a semiconductor element or the like. The controller 150 may be configured only by hardware, or may be realized by combining hardware and software. The controller 150 can be realized by a microcomputer.

  The buffer memory 115 functions as a work memory for the image processing unit 160 and the controller 150. The buffer memory 115 can be realized by a DRAM, a ferroelectric memory, or the like, for example. A card slot 107 is detachable from the memory card 108. The card slot 107 can be mechanically and electrically connected to the memory card 108. The memory card 108 includes a flash memory, a ferroelectric memory, and the like, and can store data.

  The built-in memory 109 can be realized by a flash memory or a ferroelectric memory. The controller 150 can store the generated image file in the memory card 108 or the built-in memory 109. Further, the controller 150 reads out the image file stored in the memory card 108 and stores it in the built-in memory 109 or reads out the image file stored in the built-in memory 109 and stores it in the memory card 108. be able to.

  The liquid crystal monitor 110 can display an image indicated by image data generated by the image sensor 141 or an image indicated by image data read from the memory card 108 or the like. The liquid crystal monitor 110 can display various setting information of the digital camera 101. For example, the liquid crystal monitor 110 can display an EV value or the like.

  The communication unit 111 is means for performing communication with an external device. The communication unit 111 can be configured by a wireless LAN unit, a USB communication unit, or the like. The operation unit 170 is a component that collectively refers to various operation means. The operation unit 170 receives a user instruction and transmits the instruction to the controller 150. The flash 113 emits light that irradiates the subject.

  The rotation detection unit 190 detects the rotation state of the digital camera 101. The controller 150 can acquire information related to the rotation state of the digital camera 101 detected by the rotation detection unit 190. For example, the rotation detection unit 190 can be realized by a rotation sensor or an angular velocity sensor. Note that the OIS actuator 134 may serve as the rotation detection unit 190. This is because it is possible to detect how much the casing is tilted according to the magnitude of the drive current.

[1-2. Digital camera rear configuration)
FIG. 2 is a rear view of the digital camera 101 according to the first embodiment of the present disclosure. Hereinafter, various operation members will be described with reference to FIG.

  The release button 171, zoom dial 172, and mode dial 174 are arranged on the upper surface of the camera body. Release button 171 accepts a pressing operation. The controller 150 starts AE control and AF control in response to the release button 171 being pressed halfway. The digital camera 101 captures an image of the subject in response to the release button 171 being fully pressed.

  The zoom dial 172 is rotatably arranged around the release button 171. The controller 150 starts optical zoom control and electronic zoom control in response to the zoom dial 172 being rotated.

  The mode dial 174 receives a rotation operation. The mode dial 174 is provided with a scale, and the operation mode of the digital camera 101 is assigned to each scale. The operation mode of the digital camera 101 includes, for example, a reproduction mode, a shooting mode, and the like. In this embodiment, the first gradation characteristic (or color space) is used as the gradation characteristic (or color space characteristic) of the photographed image. Characteristic) or second gradation characteristic (or color space characteristic). The controller 150 controls the digital camera 101 in an operation mode designated by the mode dial 174 in accordance with the rotation operation of the mode dial 174.

  The power switch 173, the cross key 180, the delete button 186, and the liquid crystal monitor 110 are arranged on the back of the camera body. The power switch 173 receives a slide operation. The power switch 173 switches the power state of the digital camera 101 according to the slide operation.

  The liquid crystal monitor 110 displays image data, a menu screen, and the like stored in the memory card 108 according to the operation mode selected by the mode dial 174.

  The cross key 180 accepts pressing operations of five patterns (181 to 185) in the four directions and the central portion. The controller 150 performs a display operation on the liquid crystal monitor 110 such as switching of reproduced image data in response to the cross key 180 being pressed.

  The delete button 186 accepts a pressing operation. The controller 150 deletes the previously selected image data in response to the delete button 186 being pressed.

[1-3. (Data structure of image file format)
[1-3-1. (Overall file structure)
FIG. 3 is a diagram illustrating a data structure of an image file format handled by the digital camera 101 according to the first embodiment of the present disclosure. The data structure of the image file format will be described with reference to FIG.

  The image file D10 stores first image data D25 and second image data D33. The second image data has a second gradation characteristic (or color space characteristic) different from that of the first image data.

  A FAT (File Allocation Table) stored in the memory card 108 manages the image file D10 as one file by managing the head identifier D22, the tail identifier D34, and the like. The controller 150 can distinguish and manage image files by reading FAT.

  Hereinafter, the structure of the image file D10 will be described in detail.

[1-3-2. (Main header)
[1-3-2-1. (General configuration of main header)
The main header part D20 has a head identifier D22 and a header part D23.

  The head identifier D22 is a marker representing the starting point of the image file D10, and is, for example, start information (xFFD8) of a file defined by the JPEG standard.

  The header part D23 is an area for storing management data for the entire image file D10. The header part D23 includes a management table T10, thumbnail image data D24, and the like as management data.

  The management table T10 includes information for distinguishing the first image data D25 and the second image data D33 from each other.

  The thumbnail image data D24 is reduced image data created based on the first image data D25. The thumbnail image data D24 has, for example, an image size of 160 horizontal pixels × 120 vertical pixels. In the Exif standard, the thumbnail image data D24 is defined as being stored in the header part D23.

[1-3-2-2. Management table)
The management table T10 will be described in detail with reference to FIG. FIG. 4 is a schematic diagram of the management table T10. The management table T10 manages each information in a state in which the head address T11, the identifier T12 of each image, and the color space information T13 of each image are associated with each other.

  The start address T11 is information indicating the start address of the area in which the second image data is stored.

  The image identifier T12 of each image is an identifier indicating whether each image data is full pixel image data or display image data. When the identifier of each image is “0”, it indicates that the corresponding image data is full pixel image data, and when the identifier is “1”, it indicates that the corresponding image data is display image data. Note that the value of the sub-image identifier may not be “0” and “1”, and may be “10” and “11”, or “01” and “10”. That is, the value of the sub-image identifier may be anything as long as it can express two different patterns.

  Here, the controller 150 can appropriately specify which of the image data is full pixel image data and which is display image data.

  For example, the controller 150 designates image data having the same number of pixels as the first image data as original image data, and designates image data having a lower number of pixels than the first image data as display image data. Good.

  Next, the reason for storing the identifier of each image in the header part D23 will be described. If there is no identifier for each image, the controller 150 needs to read all image headers or each image data when searching for image data. However, if all image headers or image data are read every time each image data is retrieved, the processing becomes complicated and the processing load on the controller 150 becomes heavy. Therefore, in order to solve such a problem, the identifier of each image is stored in the header part D23.

  Next, the reason why an identifier indicating full pixel image data and an identifier indicating display image data are provided as sub-image identifiers will be described. Retrieval of image data using the identifier of each image is often necessary when displaying image data. In that case, it is sufficient if the image data can be searched from the viewpoint of whether the image data is display image data or full pixel image data that is the basis of the display image data. Therefore, in order to increase the efficiency of search, an identifier indicating full pixel image data and an identifier indicating display image data are provided in accordance with the viewpoint of the search that is most frequently executed.

  The color space information T13 of each image is information indicating which color space each image data is based on.

  Since the header part D23 stores the color space information T13 of each image, the controller 150 can select a reproduction method corresponding to the color space of each image data by referring to the color space information T13 of each image. For example, if “sRGB” is stored as the color space information T13, the controller 150 can perform reproduction based on YC → RGB conversion of sRGB.

[1-3-2-2-3. (Thumbnail image data)
Returning to FIG. 3, the thumbnail image data D24 will be described. The thumbnail image data D24 is generated when the electronic zoom processing unit 165 performs a thinning process, a clipping process, an interpolation process, and the like on the first image data D25. The header part D23 stores thumbnail image data D24. Thereby, the liquid crystal monitor 110 can display a thumbnail image instantaneously.

[1-3-2-4. Other stored information)
In addition to the management table T10 and the thumbnail image data D24, the header part D23 stores first image data and protect information of each image data. When the protect information is stored, the first image data D25 is protected against deletion. That is, the first image data D25 cannot be deleted until the protect information is deleted.

  Here, the protection information for the first image data can be stored in the main header, and the protection information for each image can be stored in the sub-image header of the corresponding sub-image data. As a result, the first image and the sub-image can be protected independently. In addition, since it is only necessary to update the header corresponding to the protection and cancellation of each image, data handling becomes easy.

  In the present embodiment, the protection information for the first image data and the protection information for each image data are stored in the corresponding headers. However, such a configuration is not necessarily required.

  For example, when protect information is stored in the main header, the image data of the entire image file may be protected. Thereby, protection of all the image data stored in the same image file can be handled collectively.

  Also, two pieces of protection information can be stored in the main header, and the protection information can also be stored in each image header. At this time, one protection information stored in the main header manages the protection state of the image data of the entire image file. The other protect information manages the protect state of the first image data. The protection information stored in each image header manages the protection state of the corresponding sub-image data. As a result, the user can select whether to manage the protection state of the image data in units of image files or to manage the protection state of each image data independently.

[1-3-3. First image data section]
The first image data portion D21 stores information related to the first image. The first image data D25 is obtained by compressing image data of an image captured by the digital camera 101 in the JPEG format. Note that the first image data D25 is not necessarily image data compressed in the JPEG format, and may be image data such as GIF data or RAW data. That is, the first image data D25 is not necessarily compressed. Moreover, even if it is compressed, any compression format may be used.

  The tail identifier D26 is a marker (xFFD9) indicating the end point of the first image data portion D21. By providing a table for managing this marker in the header part D23, when dividing some image data in the image file D10, it is not necessary to newly add SOI or EOI to the file. Therefore, the file can be easily divided.

[1-3-4. Second image part]
In FIG. 3, the sub image data part D30 stores information on the second image. The head identifier D31 is a marker indicating the starting point of the second image data part D30. A table for managing this marker is provided in the header part D23. Thereby, the second image data can be easily searched. In addition, when dividing a file, a dividing point can be easily found. Furthermore, by providing this marker, when dividing the image file D10, it is not necessary to newly add SOI or EOI to the file. Therefore, the file can be easily divided.

  The second image header D32 stores attribute information of the second image data D33 and the like. For example, information relating to the fact that the second image data D33 is image data having a second gradation characteristic different from that of the first image is stored.

  The second image header D32 stores thumbnail image data of the second image data D33. The thumbnail image data is generated based on the second image data. Thereby, it is possible to instantaneously display thumbnail images for the sub-image data.

  The Exif standard stipulates that it is necessary to include thumbnail image data in the header part. Therefore, when dividing the first image data and the second image data, it is necessary to store the thumbnail image data again in the image header. In this embodiment, since thumbnail image data corresponding to the sub-image is stored in each image header, when the first and second image data are divided, the thumbnail image data is stored again in the sub-image header. There is no need.

  Note that the second image header D32 may store header information in a format different from that of the header portion D23 of the first image data. For example, Exif standard header information may be stored in the header part D23, and an MP4 format header may be stored in the second image header D32.

  The second image data D33 has a second gradation characteristic (or color space characteristic) different from that of the first image data D25.

  The tail identifier D34 is a marker indicating the end point of the second image data part D30. A table for managing this marker is provided in the header part D23. Thus, when dividing the image file D10, there is no need to newly add SOI or EOI to the file. Therefore, the file can be easily divided.

[2. (Recording operation)
The recording operation of the digital camera 101 according to the first embodiment will be described with reference to the flowchart of FIG. When the user fully presses the release button 171 in the shooting mode, the RAW data output from the image sensor 141 is stored in the buffer memory 115. (S102).

  Next, according to the setting of the mode dial 174, the controller 150 determines whether to shoot with the second gradation characteristic (or color space characteristic) or with the first gradation characteristic (or color space characteristic). Judgment is made (S103).

  When it is determined that the shooting is performed with the second gradation characteristic (or color space characteristic), the pre-processing unit 161 applies the second gradation characteristic (or color space characteristic) to the RAW data in the buffer memory 115. Processing is performed, and second YC data is generated by the YC converter 162 (S104 to S105). The second YC data is compressed by the compression unit 163 based on the second encoding method (S106). The second encoding method may be, for example, an HEVC intraframe compression method (HEVC-i) or a JPEG compression method. The raw data in the buffer memory 115 is subjected to image processing by the first gradation characteristic (or color space characteristic) in the pre-processing unit, and the first YC data is generated by the YC conversion unit 162 (S107 to S108). . The first YC data is compressed by the compression unit 163 based on the first encoding method. The first compression method may be, for example, a JPEG compression method. The first image data generated in this way is combined with the second image data, and is recorded on the memory card 108 in the format shown in FIG. 3 as one file. At this time, the color space information T13 in the management table T10 includes BT. A value of 2020 is recorded.

  On the other hand, when it is determined that the shooting is performed with the first gradation characteristic (or color space characteristic), the first gradation characteristic (or color space characteristic) is processed in the pre-processing unit 161 with respect to the RAW data in the buffer memory 115. Then, image processing is performed, and the YC conversion unit 162 generates first YC data (S204 to S205). The first YC data is compressed by the compression unit 163 based on the first encoding method. The image data generated in this way is recorded on the memory card 108 as a JPEG file that does not include the second image data based on the second gradation characteristic (or color space characteristic). At this time, the value of sRGB or AdobeRGB is recorded in the color space information T13 in the management table T10.

[3. (Playback operation)
A reproduction operation of image data in the digital camera 101 according to the first embodiment of the present disclosure will be described with reference to a flowchart FIG. 6 of the reproduction operation. In the reproduction mode, the management table T10 of the image to be reproduced is read from the memory card 108 (S302), and the color space information T13 stored in the management table T10 is the second gradation characteristic (or color space characteristic). ) Is included (S303). If the image data of the second gradation characteristic (or color space characteristic) is included, it is determined whether or not the playback apparatus supports the second gradation characteristic (or color space characteristic) (S304). If an image having the second gradation characteristic (or color space characteristic) is included in the reproduction file and the reproduction apparatus is compatible with the second gradation characteristic (or color space characteristic), the second file in the management table T10 is displayed. The second image data D33 is reproduced according to the head address of the image data of the second image (S305). When the reproduction file does not include an image having the second gradation characteristic (or color space characteristic), and when the reproduction apparatus does not support the second gradation characteristic (or color space characteristic), the first The image data D25 is reproduced (S315).

  With the above configuration, the digital camera 101 according to the present embodiment has the second gradation characteristic (or color space characteristic) when performing shooting based on the second gradation characteristic (or color space characteristic). The image data and the image data of the first gradation characteristic (or color space characteristic) are combined and recorded on the memory card 108 as one image file. In the reproduction operation of the image data having the second gradation characteristic (or color space characteristic), if the reproduction apparatus supports the second gradation characteristic (or color space characteristic), the second image data is reproduced. When the playback device does not support the second gradation characteristic (or color space characteristic) and when the reproduction file does not include image data of the second gradation characteristic (or color space characteristic), The first image data is reproduced. The second gradation characteristic is a gradation characteristic suitable for a reproducing apparatus having a wide dynamic range, and the second color space characteristic is a color space characteristic suitable for a reproducing apparatus capable of reproducing a wide color space. Note that the memory card 108 for recording image files may be the built-in memory 109 built in the digital camera 101.

[4. (Edit)
Image data editing in the digital camera 101 according to the first embodiment will be described.

  In the digital camera 101 according to the first embodiment, as shown in FIG. 3, the first image data D25 and the second image data D33 are independently stored in one file. It is possible to independently change the gradation characteristics for the image data D25 and the second image data D33. That is, the digital camera 101 reproduces an image file from the memory card 108 and allows the user to select which gradation (or color space) to change, the first image or the second image. When changing the gradation characteristic (or color space characteristic) of the first image, the gradation characteristic (or color space characteristic) of the first image data D25 is changed and recorded. When changing the gradation characteristic (or color space characteristic) of the second image, the gradation (or color space characteristic) of the second image data D33 according to the start address of the second image in the management table T10. Change and record.

[5. Effect etc.)
(1) In the present embodiment, the digital camera 101 has a second gradation characteristic different from the first gradation characteristic and means for generating the first image data D25 having the first gradation characteristic. Means for generating the second image data D33, and means for storing the first image data D25 and the second image data D33 in one image file D10.

  As a result, image data (D25, D33) having different gradation characteristics is recorded in the image file D10. Therefore, when printing or displaying an image, the recorded image file D10 is printed with the first image data D25 or the second image data D33 according to the gradation characteristics suitable for the dynamic range of each device. Or can be displayed.

  (2) In the present embodiment, the image data processing device 101 generates a first image data D25 having a first color space characteristic, and a second color space different from the first color space characteristic. Means for generating second image data D33 having characteristics, and means for storing the first image data D25 and the second image data D33 in one image file D10.

  As a result, image data (D25, D33) having different color space characteristics is recorded in the image file D10. Therefore, when printing or displaying an image, the recorded image file D10 is converted into the first image data D25 or the second image data D33 according to the color space characteristics suitable for the color space characteristics of each device. Can be printed or displayed.

  (3) In this embodiment, the image data processing apparatus 101 has the first gradation characteristic or the first color space characteristic in addition to the means constituting the image data processing apparatus, and the number of display pixels of the television ( For example, means for generating the third image data D43 having the number of pixels equal to 1920 × 1080 pixels), the second gradation characteristic or the second color space characteristic, and the number of display pixels of the television (for example, 3840 × 2190 pixels), a means for generating fourth image data D53 having the same number of pixels, first image data D25, second image data D33, third image data D43, and fourth image data D53. Means for storing in one image file D10.

  Thus, image data (D25, D33, D43, D53) having different numbers of pixels is recorded in the image file D10. Therefore, each display device can select and reproduce image data (D43 or D53) equal to the number of display pixels, and the time required for image display can be shortened.

  (4) In the present embodiment, the image data processing apparatus 101 includes means for generating the first image data D25 having the first gradation characteristic or the first color space characteristic, the first gradation characteristic or Means for generating second image data D33 having second gradation characteristics or second color space characteristics different from the first color space characteristics, and the difference between the second image data and the first image data Means for generating difference image data D63 from the data, and means for storing the first image data D25 and the difference image data D63 in one image file D60.

  As a result, it is possible to generate differential image data D63 having a data amount smaller than that of the second image data D33, the capacity of the image file can be made smaller than that of the image file D10, and the usage amount of the memory card 108 can be reduced. it can.

  (5) In the present embodiment, the image data processing apparatus 101 includes at least second image data (D33, D63, D43, D53) having second gradation characteristics in the image file (D10 or D60) to be reproduced. Means for determining whether any image data) is included, second image data (at least one of D33, D63, D43, and D53) is included, and the second floor And a means for reproducing second image data (image data of at least one of D33, D63, D43, and D53).

  As a result, the image data processing apparatus 101 can reproduce with optimum gradation characteristics that can be expressed by the image data processing apparatus 101.

  (6) In the present embodiment, the image data processing apparatus 101 uses the second image data ((D33, D63, D43, D53) having the second color space characteristic in the image file (D10 or D60) to be reproduced. Means for determining whether or not at least one of the image data) is included, second image data (at least one of D33, D63, D43, and D53) is included, and the second A unit that reproduces second image data (image data of at least one of D33, D63, D43, and D53) if the color space characteristic is supported.

  As a result, the image data processing apparatus 101 can reproduce with the optimum color space characteristics that can be expressed by itself.

  (7) In the present embodiment, the image data processing apparatus 101 stores an image file (at least two or more image data of D25, D33, D63, D43, and D53) having a plurality of gradation characteristics ( D10 or D60) means for reproducing the first image data D25 having the first gradation characteristics, and second image data (D33, D63, D43, D53) having the second gradation characteristics. At least one of the image data) and the fifth image data is generated by changing the gradation characteristics of the second image data (at least one of D33, D63, D43, and D53). Means and means for storing the first image data and the fifth image data in one image file (D10 or D60).

  Accordingly, the user of the image data processing apparatus 101 can adjust the gradation characteristics of the second image data (image data of at least one of D33, D63, D43, and D53) stored in the image file (D10 or D60). Can be processed and edited into an image having gradation characteristics in accordance with the dynamic range of the display device and the user's intention.

  (8) In the present embodiment, the image data processing apparatus 101 stores an image file (at least two or more image data of D25, D33, D63, D43, and D53) having a plurality of color space characteristics ( D10 or D60) of reproducing the first image data D25 having the first color space characteristics and second image data (D33, D63, D43, D53) having the second color space characteristics. 5th image data is generated by changing the color space characteristics of the second image data (image data of at least one of D33, D63, D43, and D53). Means, and means for storing the first image data and the D25 fifth image data in one image file (D10 or D60).

  As a result, the user of the image data processing apparatus 101 can change the color space characteristics of the image data (at least two of D25, D33, D63, D43, and D53) stored in the image file (D10 or D60). Can be processed and edited into an image having color space characteristics in accordance with the dynamic range of the display device and the user's intention.

  (9) Also, in the present embodiment, the image data processing apparatus 101 has a means for selecting the gradation characteristic by the user, and the first gradation characteristic when the user selects the first gradation characteristic. The first image data having D25 is generated and the first image data D25 having the first gradation characteristic is stored, and the second image data having the second gradation characteristic different from the first gradation characteristic is stored. When an image file that does not store (image data of at least one of D33, D63, D43, and D53) (a file configured by the end identifier D26) is generated and the user selects the second gradation characteristic, First image data D25 having first gradation characteristics is generated, and first image data D25 having first gradation characteristics is stored, and second gradation characteristics different from the first gradation characteristics are stored. Second image data (D3 Comprises means for generating a D63, D43, at least one of the image data D53) is also an image file storing (D10 or D60), the.

  Thus, only the first image data D25 is recorded when the first gradation characteristic is selected, and the first image data D25 and the second image data are recorded when the second gradation characteristic is selected. It is possible to record a file that stores (image data of at least one of D33, D63, D43, and D53) (a file composed of up to the end identifier D26, or D10 and D60).

  (10) In the present embodiment, the image data processing apparatus 101 stores an image file (at least two or more image data of D25, D33, D63, D43, and D53) having a plurality of gradation characteristics ( Means for selecting and reproducing image data (any one of D25, D33, D63, D43, and D53) according to the dynamic range of each image data processing apparatus 101 and the user's intention from D10 or D60). Prepare.

  Thereby, the user of the image data processing apparatus 101 can select and reproduce the image data according to the dynamic range of each image data processing apparatus 101 or the user's intention.

(Other embodiments)
As described above, the first embodiment has been described as an example of the technique disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments that have been changed, replaced, added, omitted, and the like. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1, and it can also be set as a new embodiment.

  Therefore, other embodiments will be exemplified below.

  In the first embodiment, as shown in FIG. 3, the first image data and the second image data are stored and recorded one by one. However, in order to speed up the reproduction display on the high-definition television, the electronic zoom process is performed. Using the unit 165, as shown in FIG. 7, third image data is generated by resizing the first image data to 1920 pixels horizontally and 1080 pixels vertically, and 1920 pixels horizontally to the second image data. Fourth image data resized to 1080 pixels may be generated. Also, when changing the first gradation characteristics, editing and recording so that the gradations of the first image data and the third image data match, and changing the second gradation characteristics. Is edited and recorded so that the gradations of the second image data and the fourth image data match. The number of pixels of the third image and the fourth image may be 3840 pixels wide and 2160 pixels high corresponding to 4K television.

In the first embodiment, the first image data D25 and the second image data D33 are recorded as independent image data as shown in FIG. 3, but as shown in FIG. Difference image data D63 between the second image data and the first image data may be stored and recorded. Since the difference image data D63 generated in this way has a smaller data capacity than the second image data, the capacity of the image file D60 can be made smaller than the capacity of the image file D10, and the recording / playback time of the image file can be reduced. It can be shortened. In the image file shown in FIG. 8, when changing the gradation characteristics of the first image data, it is necessary to change and record the gradation characteristics of the first image data and the difference image data.

  In the first embodiment, the digital camera 101 has been described as an example of the image data processing apparatus. However, if the image processing unit 160, the buffer memory 115, the controller 150, the operation unit 170, the liquid crystal monitor 110, the card slot 107, and the memory card 108 are configured, a television that does not perform imaging. It can be applied to a display device such as a playback device and an editing device.

  According to the present disclosure, in devices having different dynamic ranges such as printers and televisions, image data having a plurality of gradation characteristics or color space characteristics that are optimal for each device can be recorded in one file, and can be edited and reproduced. . For example, the present invention can be applied to a printer, a television, a monitor, a digital still camera, a digital video camera, a mobile phone terminal with a camera function, a smartphone, and the like.

101 Digital camera (image data processing device)
108 Memory Card 109 Built-in Memory 110 LCD Monitor 111 Communication Unit 115 Buffer Memory 141 Image Sensor 150 Controller 160 Image Processing Unit 163 Compression Unit 164 Expansion Unit 165 Electronic Zoom Processing Unit 174 Mode Dial D10 Image File D25 First Image Data D33 Second Image data of D60 image file

Claims (8)

Means for generating first image data having first gradation characteristics;
Means for generating second image data having a second gradation characteristic different from the first image data;
Means for storing and recording the first image data and the second image data in one file;
An image data processing apparatus comprising: Means for generating first image data having a first color space characteristic;
Means for generating second image data having a second color space characteristic different from the first image data;
Means for storing and recording the first image data and the second image data in one file;
An image data processing apparatus comprising: Means for generating third image data from the first image data corresponding to the number of pixels of the reproduction device;
Means for generating fourth image data from the second image data;
Means for storing and recording the first image data, the second image data, the third image data, and the fourth image data in one file;
The image data processing apparatus according to claim 1, further comprising: Means for generating difference image data between the second image data and the first image data;
Means for storing and recording the first image data and the difference image data in one file;
The image generation apparatus according to claim 1, further comprising: An image data processing apparatus for reproducing image data stored in a file according to claim 1,
Means for determining whether the image file to be reproduced includes the second image data having the second gradation characteristic;
Means for reproducing the second image data if the second image data is included and corresponds to the second gradation characteristic;
An image data processing apparatus comprising: An image data processing apparatus for reproducing image data stored in a file according to claim 2,
Means for determining whether the second image data having the second color space characteristic is included in an image file to be reproduced;
Means for reproducing the second image data if the second image data is included and corresponds to the second color space characteristic;
An image data processing apparatus comprising: An image data processing apparatus for editing image data stored in a file according to claim 1,
Means for determining whether an image file to be edited includes a plurality of image data having a plurality of different gradation characteristics;
Means for allowing a user to select an image to be edited from the plurality of image data;
Means for changing and recording the gradation characteristics of the selected image data according to the user's selection;
An image data processing apparatus comprising: An image data processing apparatus for editing image data stored in a file according to claim 2,
Means for determining whether an image file to be edited includes a plurality of image data having a plurality of different color space characteristics;
Means for allowing a user to select an image to be edited from the plurality of image data;
Means for changing and recording the color space characteristics of the image data selected according to the user's selection;
An image data processing apparatus comprising:

Images