Classifications

• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
  • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/47—End-user applications
  • H04N21/485—End-user interface for client configuration
  • H04N21/4854—End-user interface for client configuration for modifying image parameters, e.g. image brightness, contrast
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
  • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/64—Circuits for processing colour signals
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2320/00—Control of display operating conditions
  • G09G2320/06—Adjustment of display parameters
  • G09G2320/0693—Calibration of display systems
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2340/00—Aspects of display data processing
  • G09G2340/06—Colour space transformation
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
  • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
  • G09G5/363—Graphics controllers

Definitions

• the present invention relates to a color matching system for displaying image data in accordance with the color characteristics of a display device.
• a color matching system that corrects images of various sources into color characteristics suitable for a color space of a display device.
• a general color matching system uses an ICC profile (International Color Consortium Profile), and the application itself uses an OS (Operating System) color matching mechanism to perform color conversion between display devices.
• the ICC profile is a 3X3 matrix that defines the relationship between standard color spaces, such as the CIEL * a * b * color system and CIEXYZ color system, and device colors (such as RGB or CMYK). And 3D tables and 4D tables.
• the realization of a color matching system largely depends on the application itself, and the developer of the application itself must have sufficient knowledge of color matching.
• the ICC profile itself such as a monitor must be registered by the user in a location managed by the OS, but the setting method differs for each OS. The reality was that it was limited.
• a color matching system includes a graphics interface that generates an image drawing instruction based on an instruction from an application, and a color conversion of display image data based on predetermined color conversion reference data.
• a color management module that performs color conversion of the display image data; and a color management module that performs interface processing between the color management module driver and the display driver.
• a computer that executes instructions to generate a graphics interface.
• the above color matching system is mounted on, for example, an image display device, and performs color conversion adapted to the color characteristics of the display device.
• a graphics interface such as GDI generates an image drawing command for the image data generated by the operation of the application, and the display image data is generated based on the image drawing command.
• the color management module After the display image data is subjected to color conversion by the color management module, the color space is adjusted in accordance with the color attribute file indicating the color characteristics of the display device, and is supplied to the display device.
• the color management module includes a color management module driver that performs color conversion of display image data, and a color management module entry that performs interface processing between the color management module driver and the display driver.
• display image data suitable for the color reproducibility of the display device is displayed on the display device.
• the color conversion processing for color matching is not performed on the application side but by the color management module on the hardware-dependent part such as the OS, so be aware of the application side. Instead, proper color matching is performed.
• the display image data is generated in accordance with the image drawing command, and the display image data is generated before color conversion by the color management module.
• the display driver may further include the display driver that processes the display image data according to a color attribute file corresponding to the output device and supplies the display image data to the display device as output image data.
• the graphics interface and the color management module perform processing based on a single predetermined standard color space
• the color attribute file includes the predetermined standard color space. It defines the color characteristics of the display device with respect to the color space.
• the display driver since the color matching processing is performed based on a single standard color space, the display driver does not need to have an ICC profile between a plurality of standard color spaces and a display device. .
• the display driver includes the color attribute file for each of a plurality of display devices.
• the display driver when the image drawing command involves enlargement of the display image data, the display driver performs enlargement processing on the display image data after the color conversion by the color management module. Do.
• the processing speed can be improved by performing the color matching processing at a stage where the size of the image data before the enlargement processing is small.
• the display driver when the image drawing command involves reduction of the display image data, the display driver provides the reduced display image data to color conversion by the color management module.
• the processing speed can be increased by performing the color matching process at a stage where the size of the image data after the reduction process is small. Wear.
• a color matching method includes: an interface step of generating an image drawing instruction based on an instruction from an application; and an image data generating the display image data according to the image drawing instruction.
• a graphics interface such as GDI generates an image drawing command for image data generated by the operation of the application, as in the color matching system described above, and generates an image drawing instruction.
• Display image data is generated based on the image drawing command.
• the color management module After the display image data is subjected to color conversion by the color management module, the color space is adjusted in accordance with a color attribute file indicating the color characteristics of the display device, and is supplied to the display device.
• display image data suitable for the color reproducibility of the display device is displayed on the display device.
• the color conversion processing for color matching is not performed on the application side, but by the color management module on the hardware-dependent part such as the OS. Appropriate color matching is performed without awareness.
• the color matching program is executed on a computer, and controls the computer to generate an image drawing command based on an instruction from an application.
• a color management module that performs color conversion of display image data based on the color conversion reference data, and generates the display image data in accordance with the image drawing instruction; and the display image after color conversion by the color management module.
• Data is processed in accordance with a color attribute file corresponding to the output device, and functions as a display driver that supplies the output image data to the display device.
• FIG. 1 is a block diagram showing a schematic configuration of an image display device to which the present invention is applied.
• FIG. 2 is a block diagram illustrating a software configuration of the image processing apparatus.
• Figure 3 is a flowchart of the display process including the color matching process.
• Figure 4 is a flowchart of a display processing example that includes image enlargement and reduction.
• FIG. 1 shows a schematic configuration of an image display device 100 to which the color matching system of the present invention is applied.
• the display device 100 can be a terminal device provided with a display device, such as a mobile phone or a PDA.
• a display device such as a mobile phone or a PDA.
• the application of the present invention is not limited to these.
• the image display device 100 is roughly divided into an image processing device 100 and a display device 20.
• the image processing apparatus 10 performs a color matching process on image data D 1 supplied from the outside or image data stored inside the apparatus to generate display image data D 2, and the display apparatus 2 Supply to 0.
• the image processing device 10 includes a CPU 12, a ROM 14, a RAM 16, a VRAM 18, and the like.
• the ROM 14 stores OS that controls the basic control of the image processing apparatus 10, various application programs, and the like.
• the RAM I 6 stores various application software, image data, and the like. Further, a part of the RAM I 6 can be used as a working memory in the color matching processing by the image processing apparatus 10.
• VRAM 18 is an image memory for storing the display image data D2 after the color matching processing by the image processing device 10.
• the CPU 12 performs various processes and controls including a later-described color matching process by executing the OS and the application program stored in the ROM 14.
• the display device 20 displays the display image data D 2 supplied from the image processing device 10. Is displayed on the display panel 22.
• the display panel 22 may be, for example, a liquid crystal panel, but is not limited thereto. Display controller
• FIG. 2 shows a software configuration diagram of the image processing apparatus 10.
• the image processing apparatus 10 mainly includes an OS 30, an application 25, and a display driver 40 as a software configuration. These components are realized by the CPU 14 shown in FIG. 1 executing OS, application programs, and the like stored in the ROM 14 and the RAM 6. Specifically, the application 25 is configured by executing an application program by the CPU 12.
• OS 30 is a graphics device interface (hereinafter referred to as “GDI”) 32, and a color management module (hereinafter referred to as “CMM: Color Management Module”) entry — 34.
• a color management module (CMM) driver 36 is provided.
• the CMM entries 34 and 36 constitute the color management module (CMM).
• the GDI 32 is software that controls output devices such as a display device and a printer in image display.Specifically, the GDI 32 generates an image drawing instruction based on the output of the application 25 and displays the image. Supply to driver 40. The display driver 40 generates display image data according to an image drawing command.
• the CMM composed of the CMM entry 34 and the CMM driver 36 performs color management of display image data according to an image drawing command by the GDI 32.
• a display driver Based on the color conversion reference data, a display driver is used. Performs color conversion of display image data supplied from 40.
• the CMM entry 34 adjusts the data format between the display driver 40 and the MM driver 36, and executes other interface processing. That is, the display image data output from the display driver 40 is a CMM entry 34 Is supplied to the CMM driver 36 via. 1 ⁇ 1
• the driver 36 performs necessary color conversion processing on the display image data, and sends the display image data after the color change processing to the display driver 40 via the CMM entry 34. .
• the display driver 40 has an ICC profile 41 which is a color attribute file corresponding to the color characteristics of a display device such as the display panel 22 in the display device 20.
• CC profile 41 is a file that describes the color attributes of each display device such as a display panel, and is prepared for each display device.
• the display driver 40 uses the ICC profile 41 corresponding to the display device 20 with respect to the display image data on which the necessary color conversion processing has been performed by the CMM to adjust the color characteristics of the display panel 22.
• the color conversion and other processing for matching are performed, and the resultant is supplied to the display device 20. That is, the display driver 40 performs a process of adapting the display image data to the color characteristics of the display device 20 which is an output device, based on the ICC profile 41.
• the display driver 40 can have an ICC profile 41 for a plurality of display devices. That is, a plurality of ICC profiles corresponding to a plurality of display panels having different color characteristics can be held. By doing so, the image processing apparatus 10 can perform correct color reproduction as long as the display panel 2-2 whose corresponding ICC profile is held in the display driver 40 is used. That is, even if the image processing apparatus 10 is used in combination with the display apparatus 20 having different color characteristics, correct color reproduction can be achieved.
• the OS 30 and the display driver 40 are configured to perform processing in a single standard color space (for example, sRGB). That is, GDI 32 receives the sRGB image from the application. At this time, the application
• application 25 may supply the sRGB image to GDI 32 as it is.
• the application or middle air performs color matching to that color space and then sends it to GDI 32. You only need to supply the image.
• the CMM driver 36 performs color conversion processing for color matching on sRGB, and supplies display image data after color conversion to the display driver 40.
• the display driver 40 uses the single standard color space and the color space of the display device. It suffices to have only an ICC profile that defines the relationship with the display device, and there is the advantage that it is not necessary to maintain ICC profiles for multiple standard color spaces for each display device.
• the display driver 40 may be a software driver, or may be a hardware driver using an accelerator or the like.
• FIG. 3 shows a flowchart of image processing.
• the processing shown in FIG. 3 is basically executed by the display driver and the CMM shown in FIG.
• the GDI instruction supplied from the GDI 32 is “BitBlt”
• the processing is performed according to the same procedure for other instructions.
• image data is transferred from the application 25 to the GDI 32, and the GDI 32 generates a GDI instruction and supplies it to the display driver 40.
• the display driver 40 receives this, analyzes the GDI instruction (step S10), and determines whether or not the GDI instruction is "BitBlt" (step S12).
• the GDI instruction "BitBlt" is, for example,
• BitBlt Bitmap, XI, Yl, X2, Y2
• Step S12 If the GDI instruction is "BitBlt;" (Step S12: Yes), the display driver 40 supplies the generated display image data to the CMM driver 36 via the CMM entry 34. Then, color conversion for color matching is performed (step S14). Next, the display driver 40 rasterizes the display image data after color conversion and develops the rasterized image data into raster data (step S16), and transfers it to the VRAM 18 (step S18). On the other hand, when the GDI instruction is not “BitBlt” (Step S12; No), the display driver 40 basically performs the processing for other GDI instructions by the same processing. Thus, the image processing ends.
• the display image data (raster data) transferred to the VRAM 18 is transferred to the display device 20 and displayed on the display panel 22 under the control of the display controller 24.
• the rasterization in step S16 is executed as software processing when the display driver 40 is a software driver, and is performed as hardware processing when the display driver 40 is a hardware driver. Executed.
• the subsequent rasterization processing is software processing or hardware processing. The same processing result can be obtained irrespective of.
• the display driver 40 and the CMM are used in the application.
• FIG. 4 shows a flowchart of the “BitBlt” processing when the enlargement or reduction of the image data is included. This process is basically executed by the display driver 40 and the CMM, as in the process shown in FIG.
• the size of the source image may need to be enlarged or reduced to a specified size.
• color matching processing is performed at a stage where the size of image data is small in the case of image enlargement and reduction.
• the display driver 40 receives the "BitBlt" GDI instruction from the GDI 32 Then, it is determined whether or not the image is enlarged based on the instruction (step S32).
• the CMM composed of the CMM entry 34 and the CMM driver 36 performs color conversion for color matching on the image data before the enlargement (step S34).
• the display driver 40 enlarges the image data after the color conversion (step S36), rasterizes it (step S42), and transfers it to the VRAM 18 (step S44).
• the display driver 40 first reduces the image prior to color matching (step S38). Then, the CMM performs color conversion for color matching on the reduced image data (step S40). Thereafter, the display driver 40 rasterizes the color-converted image data (step S42) and transfers it to the VRAM 18 (step S44).
• Enlargement or reduction of image data is performed, for example, when displaying image data of a certain size on a display device with a different display size, or once displaying it on a specific display device, expanding or reducing the image data as necessary It is performed when you do.
• the color reproduction of the display device is performed by the hardware-dependent part (OS side) for controlling the device. Since color matching suitable for the space is performed, appropriate color matching can be performed without the application developer or the user of the display device being conscious. Unlike the case of image data such as a natural image, it is rare that color matching processing is usually performed on an application for drawing a line, a character, a rectangular shape, and a fill command. According to the processing, the drawing color is specified via GDI for such items, so that colors suitable for the display device can be reproduced.
• OS side hardware-dependent part
• the color matching processing according to the present invention is performed by using an input device (for example, a CCD camera), an output device (for example, an LCD), contents (an image from an external information provider), and other digital cameras.
• an input device for example, a CCD camera
• an output device for example, an LCD
• contents an image from an external information provider
• other digital cameras for example, a CCD camera
• image data such as images can be targeted.

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• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Multimedia (AREA)
• Computer Hardware Design (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Human Computer Interaction (AREA)
• Software Systems (AREA)
• Image Processing (AREA)
• Color Image Communication Systems (AREA)
• Facsimile Image Signal Circuits (AREA)
• Processing Of Color Television Signals (AREA)

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• 2004
  • 2004-02-17 JP JP2004039534A patent/JP2005236356A/ja not_active Withdrawn
• 2005
  • 2005-02-14 TW TW094104194A patent/TW200537430A/zh not_active IP Right Cessation
  • 2005-02-16 US US11/058,210 patent/US20050179918A1/en not_active Abandoned
  • 2005-02-17 WO PCT/JP2005/002972 patent/WO2005079055A1/ja not_active Ceased
  • 2005-02-17 KR KR1020067018855A patent/KR20060111726A/ko not_active Ceased
  • 2005-02-17 CN CNA2005800051619A patent/CN1922860A/zh active Pending
  • 2005-02-17 EP EP05710623A patent/EP1722550A4/en not_active Withdrawn

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