JP4498116B2 - Imaging apparatus and raw data processing method - Google Patents

Description

  The present invention relates to a technique for performing development processing on a camera side on RAW format image data that has already been shot.

  Some conventional digital cameras can select color / monochrome settings before shooting. Furthermore, by performing signal processing on the image data after shooting, for example, adjusting the color tone of the image, changing the contrast, or converting the color image to a black and white image on the camera side, and displaying it for reproduction or display. A system capable of performing print output has also been proposed. For this reason, the user can confirm the effect of finishing the photographed image in an arbitrary color tone on the camera side or the effect of converting the image into a black-and-white image, regardless of location or time. Also, by using these functions, it is possible to confirm whether the data when printing directly from the camera is a color image or a monochrome image, and the convenience for the user is improved (see Patent Document 1).

However, “image data” in Patent Document 1 refers to image data that has already been developed, not RAW data. The above-described image processing function is effective only for developed image data.
JP 2000-350234 A JP 2004-304712 A

  Currently, a function for performing development processing by setting development parameters such as white balance with a single camera from RAW data that has not been subjected to development processing is not realized. For this reason, in order to develop RAW data photographed by a digital camera, it is necessary to transfer the data to an image processing apparatus such as a personal computer and then perform the development using a dedicated application. Therefore, if the user wants to develop and print out RAW data, or if he wants to check an image that has already undergone development processing from RAW data that has already been taken in order to confirm the effect of white balance, etc., the camera alone develops it. Inconvenient because I can't.

  Even if these are realized, when setting development parameters, the GUI (graphic user interface) and parameter input means are limited in the camera, so the development parameters are directly input each time. Is complicated, and the operability of the camera is significantly reduced.

  Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to enable development processing of RAW data after photographing on the camera side with an operation that is easy for the user to understand.

In order to solve the above-described problems and achieve the object, an imaging apparatus according to the present invention includes an imaging unit that captures a subject image, and a recording unit that records RAW data of an image captured by the imaging unit on a recording medium. A setting dial in which an imaging mode of the imaging unit is set; and an image processing unit that performs image processing on the RAW data recorded on the recording medium and generates image data in which the captured image is visible The setting dial has a dial position where both the imaging mode and an image processing parameter corresponding to the imaging mode are registered, and the image processing means has the setting dial at the dial position. JP some time, by the image processing parameters registered in the dial position is subjected to image processing on the RAW data recorded on the recording medium And

Further, a RAW data processing method according to the present invention is a method for processing RAW data of an image captured by an imaging means in an imaging apparatus, and a recording step of recording the RAW data of the captured image on a recording medium; setting dial, and an imaging mode, when the in-dial position and an image processing parameter corresponding to the imaging mode are registered together, and a selection step of selecting the image processing parameter corresponding to the imaging mode, the recording medium An image processing step of performing image processing on the recorded RAW data using the image processing parameter selected in the selection step, and generating image data in which the captured image is visible. Features.

  According to the present invention, it is possible to perform image processing for generating visible image data from RAW data after photographing on the imaging device side by an operation that is easy for the user to understand.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of an embodiment of a digital camera of the present invention.

  The digital camera of the present embodiment is a single-lens reflex type camera capable of exchanging lenses. In FIG. 1, 1 is a camera body, 2 is an interchangeable lens, and 3 is a flash light emitting device.

  The camera body 1 includes a mode selection dial 113 that can select a shooting mode at the time of shooting, various setting buttons (function buttons) 117, a display 111 for confirming a shot image, a shutter release button 114, an optical viewfinder 118, and the like. Has been placed.

  FIG. 2 is a block diagram schematically showing the electric circuit configuration and signal processing flow of the camera body 1, the interchangeable lens 2 attached to the camera body 1, and the flash unit 3 of the present embodiment.

  In the camera body 1, reference numeral 109 denotes a one-chip microcomputer control device (hereinafter referred to as a camera control microcomputer) in which an ALU, ROM, RAM, AD converter, general-purpose I / O port, serial communication port (SPI), and the like are incorporated. It supervises the overall operation of the camera.

  A focus detection sensor (AF sensor) 101 and a photometric sensor (AE sensor) 100 are sensors for measuring the focus and luminance of a subject. The output signals of the focus detection sensor 101 and the photometric sensor 100 are connected to the A / D converter input terminal of the one-chip microcomputer 109 and processed in the microcomputer as digital data.

  Reference numeral 103 denotes a shutter drive device that operates the shutter 102 based on a command from the camera control microcomputer 109. Similar to the camera control microcomputer 109, an image processing dedicated one-chip microcomputer incorporating an ALU, RAM, A / D converter, D / A converter, general-purpose I / O port, serial communication port (SPI), and the like. (Hereinafter referred to as an image processing microcomputer). The image processing microcomputer 105 performs A / D conversion on the image signal output from the image sensor 104 while controlling the image sensor 104 in accordance with a command from the camera control microcomputer 109. The converted data is buffered in the memory 106 as a digital value.

  RAW data is data temporarily stored in the memory 106 and stored in the external recording medium 107 as it is. On the other hand, development processing is processing for generating visible image data by performing image processing such as various correction / interpolation processing, color conversion processing, gain adjustment processing, image compression / expansion processing on the data buffered in the memory 106 That's it. Visible image data generated by performing this development processing by the image processing microcomputer 105 is also stored in the image recording medium 107. At this time, the mode setting dial 113 is an input device that collectively selects and sets the parameters used for development in accordance with the shooting scene.

  A memory 106 that performs buffering of imaged data is a volatile memory that can be accessed at high speed, represented by SDRAM. Reference numeral 107 denotes a small and large-capacity external recording medium represented by a NAND flash ROM or a small hard disk drive, and is used for the purpose of recording the above-mentioned RAW data and developed image data. The external recording medium 107 is detachable from the camera body 1 and can transfer shooting data to another device such as a PC.

  Reference numeral 110 denotes a first motor driver, which is controlled by an output terminal of the camera control microcomputer 109 to drive the first motor 116 to raise and lower the mirror.

  Reference numeral 111 denotes a display unit having a multi-purpose function that includes a liquid crystal panel or the like and displays captured images such as the number of captured images, date information, and exposure information. Reference numeral 113 denotes a shooting mode setting dial, and reference numeral 114 denotes a release switch. Reference numeral 112 denotes a dedicated serial port for directly connecting to a print output device.

  Reference numeral 115 denotes a contact portion with the lens 2 shown in FIG. 1, and the serial communication port signal of the camera control microcomputer 109 is input / output. Reference numeral 108 denotes a connection portion with the flash device 3 shown in FIG. 1, and an input / output signal of a serial communication port of the camera control microcomputer 109 is connected to communicate with the flash device 3.

  In the interchangeable lens 2, reference numeral 204 denotes a one-chip microcomputer for lens control by a one-chip microcomputer having an ALU, ROM, RAM, timer, serial communication port, etc. therein (hereinafter referred to as a lens control microcomputer). Reference numeral 201 denotes a second motor driver which is connected to and controlled by the output terminal of the lens control microcomputer 204 and drives a second motor 207 for performing focus adjustment.

  A third motor driver 202 is connected to and controlled by the output terminal of the lens control microcomputer 204, and drives a third motor 208 for controlling the aperture. Reference numeral 205 denotes a distance encoder for obtaining information relating to the extension amount of the focus adjustment lens, that is, the subject distance, and an output signal is input to the lens control microcomputer 204. Reference numeral 206 denotes a zoom encoder for obtaining focal length information at the time of shooting when the interchangeable lens 2 is a zoom lens, and is connected to an input terminal of the lens control microcomputer 204. Reference numeral 203 denotes a contact portion with the camera body 1 to which an input / output signal of a serial communication port of the lens control microcomputer 204 is connected.

  When the interchangeable lens 2 is attached to the camera body 1, the respective contact portions 115 and 203 are connected, and the lens control microcomputer 204 can perform data communication with the camera control microcomputer 109 of the camera body 1. The lens-specific optical information necessary for the camera control microcomputer 109 of the camera body 1 to perform focus detection and exposure calculation, information on the subject distance from the distance encoder 205 or zoom encoder 206, and focal length information are mutually exchanged. Data communication to. Further, the focus adjustment value and aperture information obtained as a result of the focus detection and exposure calculation performed by the camera control microcomputer 109 are output from the camera control microcomputer 109 to the lens control microcomputer 204, and the lens control microcomputer 204 based on the focus adjustment value and the aperture information are output. The second motor driver 201 is controlled according to the focus adjustment information, and the third motor driver 202 is controlled according to the aperture information.

  In the flash unit 3, as with the camera control microcomputer 109, for example, a one-chip microcomputer (hereinafter referred to as a flash control microcomputer) having an ALU, ROM, RAM, A / D converter, timer, serial communication port, and the like built therein. Reference numeral 301 denotes a boosting unit that generates a high voltage of about several hundred volts necessary for light emission of the light emitting unit 300. The light emitting unit 300 emits light to illuminate the subject, and the monitor sensor 302 monitors the light emission amount of the light emitting unit 300. When the flash device 3 is attached to the camera body 1, the connection units 304 and 108 are connected, and the flash control microcomputer 303 can perform data communication with the camera control microcomputer 109. The flash control microcomputer 303 controls the booster unit 301 according to the communication content from the camera control microcomputer 109 of the camera body 1 to start and stop the light emission of the light emitting part 300, and to detect the detection amount of the monitor sensor 302 for controlling the camera body. Output to the microcomputer 109.

  Next, the control method and operation sequence of the camera body 1 according to the present embodiment will be described with reference to the flowchart of FIG.

  In FIG. 3, it is assumed that the digital camera stores at least one RAW data already captured in the external recording medium 107. In addition, when performing print processing after performing development processing from RAW data that has already been photographed at the time of non-photographing, the connector 401 of the connection cable from the print output device is connected to the print output connection terminal 112.

  By operating the function button 117 or the like, the RAW data to be developed is selected from the photographed image data stored in the external recording medium 107 (step S1). In this state, the digital camera is in a RAW data development operation mode. When selecting RAW data, it is also possible to display a thumbnail image on the display 111 and select an image from the thumbnail image. The thumbnail image displayed at this time may be data obtained by developing RAW data with appropriate parameters, or development processing is performed simultaneously with shooting and data recorded on the external recording medium 107 together with the RAW data is used. Also good. Further, one or a plurality of images to be developed may be selected at a time. The RAW data selected in this way is expanded on the working memory 106 via the image processing microcomputer 105.

  Next, development parameter settings prior to development processing are performed.

  FIG. 4 shows an example of the mode setting dial 113 of the camera. Twelve symbols and characters are printed on the dial surface. During normal shooting, this dial is rotated so that symbols and characters corresponding to the shooting scene are adjusted to the index. When shooting is performed in this state, optimal exposure control is performed for the scene, and parameters for simultaneous development processing are also set.

  In the present embodiment, the use of the mode setting dial 113 is taken into consideration when selecting development parameters even when developing RAW data that has already been shot. Each mode of the mode setting dial 113 holds development parameters used for development. When the digital camera is not in the shooting operation mode but in the RAW data development operation mode, the mode setting dial 113 functions not as a shooting mode selection means but as a development parameter selection means.

  Here, the development parameter is a part of or all of the parameters of the white balance value and image correction data (brightness, contrast ratio, hue, compression / expansion size, etc.) necessary for developing the RAW data. Pointing.

  For example, FIG. 4A shows a state in which the development parameter setting suitable for the portrait is selected. For example, in order to make human skin look beautiful, development parameters are determined so that a soft image with a low hue and a low contrast is finished.

  FIG. 4B shows a state where parameter settings suitable for a landscape photograph are selected. For example, the development processing parameters are set so that a high-contrast, vivid image suitable for a landscape photograph is finished.

  FIG. 4C shows a state where the user setting mode is selected. If the user-specific parameters are registered in this mode in advance, the user-specific development processing parameters can be easily called up as in the above-described mode.

  Further, since the mode setting dial is represented by symbols and characters, there is also an advantage that the user can easily grasp the developed image.

  When the dial is rotated to set parameters (step S2) and development processing is started, first, the image data developed in the memory 106 is transferred to the image processing microcomputer 105 and development processing is performed. The developed data is temporarily stored on the memory 106 and displayed on the display 111. The user confirms whether or not the target image is developed.

  If the finished image is different from the target image or if it is desired to compare with an image developed with different development parameters, the mode setting dial can be reset here and the development process can be performed again (step S3). .

  It is selected whether the developed image data is transferred to a print output device for printing or stored as image data in the external recording medium 107 (step S4). When printing out, a connector 401 from the printing apparatus is connected to the print output port 112 of the camera body. If file saving is selected, the process proceeds to step S7.

  When printing out the developed image data, print parameters are set after setting print parameters such as output resolution, size, print quality, and number of images. At this time, these print settings can be designated from the camera side. Specifically, the function button 117 is operated to display a menu on the display 111, and desired print parameter setting is performed on the menu (step S5).

  Thereafter, if the print data is not saved, the process is terminated (step S6: not saved). In the case of saving, the process proceeds to step S7.

  When outputting the developed image data to the external recording medium 107, an output resolution, a compression rate, a storage format, and the like are set in advance by using the function button 117 and a menu displayed on the display 111. Thereafter, the image data on the memory 106 is transferred again to the image processing microcomputer 105 and reprocessed. The data that has been reprocessed and converted into the desired format is stored in the external recording medium 107 (step S7).

  As described above, according to the above-described embodiment, after shooting, the RAW data file is transferred to an image processing apparatus such as a personal computer, and the RAW data is developed without selecting the time and place without performing the development process. Can be processed. In addition, if the camera is directly connected to the printing device, it is possible to print out raw data from the camera alone, and RAW data development processing that has been difficult to handle for beginner level users, or print output operations. Can be provided in a simpler form.

  Further, since the development processing is performed from the RAW data, it is possible to obtain a high-quality image with less data deterioration as compared with a method in which image correction is repeated from the compressed data after development. Further, the development data described above can be directly printed out from the camera, or the developed image can be stored in a recording medium.

  Further, by using the mode setting dial for setting development parameters, even beginners can avoid troublesome parameter setting. Further, it is easy to visually grasp the developed image from the icon (symbol) displayed on the dial.

  Also, custom setting is possible by the user setting arbitrary development parameters for one or a plurality of icons (symbols) on the mode setting dial. In this way, the adjustment of the development parameters and the finish can be quickly confirmed at the shooting site, which improves the convenience for the user.

It is a figure which shows schematic structure of one Embodiment of the digital camera of this invention. It is the block diagram which showed the system configuration | structure of the camera main body, the interchangeable lens, and the flash apparatus. 7 is a flowchart illustrating a RAW image development processing operation and an operation for selecting an output destination. It is a figure which shows the example of a setting of a mode dial.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Camera body 2 Interchangeable lens 3 Flash apparatus 100 Photometric sensor 101 Focus detection sensor 102 Shutter 104 Image sensor 105 One-chip microcomputer for image signal processing 106 Memory 107 External recording medium 109 One-chip microcomputer for camera control 112 Printing apparatus connection Connector 113 Mode setting dial 117 Function button

Claims (6)

Imaging means for capturing a subject image;
Recording means for recording RAW data of an image captured by the imaging means on a recording medium;
A setting dial in which the imaging mode of the imaging means is set;
Image processing means for performing image processing on the RAW data recorded on the recording medium and generating image data in which the captured image is visible;
The setting dial has a dial position where both the imaging mode and an image processing parameter corresponding to the imaging mode are registered,
The image processing means performs image processing on RAW data recorded on the recording medium according to an image processing parameter registered at the dial position when the setting dial is at the dial position. apparatus.   The imaging apparatus according to claim 1, wherein an image processing parameter designated by a user can be registered at at least one dial position of the setting dial.   The apparatus according to claim 1, further comprising: a connection unit that connects to an external print output device; and an output unit that outputs image data generated by the image processing unit to the print output device. Imaging device.   When the dial position of the setting dial is changed, the image processing unit regenerates image data in which a captured image is visible using an image processing parameter corresponding to the changed dial position. The imaging device according to any one of claims 1 to 3. In the imaging apparatus, a method of processing RAW data of an image captured by an imaging unit,
A recording step of recording RAW data of the captured image on a recording medium;
Setting dial, and an imaging mode, when the image processing parameter corresponding to the imaging mode is the dial position being registered together, a selection step of selecting image processing parameters corresponding to the imaging mode,
An image processing step of performing image processing on the RAW data recorded on the recording medium using the image processing parameter selected in the selection step, and generating image data in which the captured image is visible;
A RAW data processing method comprising:   6. The raw data processing method according to claim 5, wherein an image processing parameter designated by a user can be registered at at least one dial position of the setting dial.

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