CN101226730A - Method and apparatus for managing color of mobile terminal - Google Patents
Method and apparatus for managing color of mobile terminal Download PDFInfo
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Abstract
The invention discloses a color management method and a device used for mobile terminals, wherein the method comprises steps of S102 for correcting parameters of display screens or cameras of the mobile terminals, S104 for creating color profiles of the display screens or the cameras and S106 for storing the color profiles. In the case that the mobile terminals display images, the color profiles are used to correct the images to display. By the invention, the effect of 'what you see is what you get' is achieved, and problems of color shift resulting from hardware performance can be effectively compensated by software, thereby shortening development cycle and conveniently realizing projects.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of color management method and device that is used for portable terminal.
Background technology
Color reducibility in the mobile phone comprises two aspects: the color representation ability of color display screen; The color restoration capability of camera pictures taken.An important indicator estimating high-end handset capability is exactly its color representation ability and reducing power, the user tends to judge by direct visual experience the height of this ability, we often can find to show normal picture on PC, on mobile phone, shown, needed the user to reach good display by adjusting parameters such as brightness, saturation degree, form and aspect with regard to distortion.The image that mobile phone camera is taken passes to be seen in the PC with original copy and differs greatly, and needs the later stage to readjust with image processing software.
At present, overwhelming majority's mobile phone manufacturing firm just works hard on hardware, expectation is proofreaied and correct the color capabilities that one group of parameter improves mobile phone by the performance of increase hardware or by software, but we know, the hardware product of the same model of same producer all is variant, even the hardware parameter of same hardware under different time and environment also is different.Can not use simply with a kind of adjustment parameter and handle, be to guarantee veritably that the mobile phone camera picture shot can restore on other output device (as display, printer, other mobile phones etc.) faithfully like this.
1993, companies such as famous in the world developer Adobe, Agfa, Apple, Kodak, FOGRA, Microsoft, Sun Microsystem initiated and have set up international color alliance (International Color Consortium is called for short ICC).They are devoted to set up, promote and encourage color management system disclosed, cross-platform, neutrality and formulated ICC Profile standard, and always in constantly revision and perfect.Announced the File Format for Color Profiles (Version 4.1.0) of latest edition in September, 2003 again, so far, International Color Association has had and has surpassed 70 members, and the manufacturing commercial city of color device, color treatments software and operating system that the whole world is famous has joined in this open color management for light successively.The color management system of using this standard can be so that each tame product can be coordinated mutually when every field is used, and value preserving is consistent.The color management system of this standard becomes the international standard of color management through the authentication of ISO.The core of the color management system of this standard is ICC Profile, and we call the chromatic characteristic file to it.ICCProfile is exactly the file of the chromatic characteristic description of a certain color devices in simple terms, and it represents the color description mode of this particular device and the corresponding relation of standard color space.ICCProfile has seven kinds, be respectively input, output, demonstration, driving connection, color space transformation, special look and absolute profile, first three kind is relatively more commonly used, wherein importing ICC Profile uses to scanner and digital camera, output ICC Profile uses to printer and film registering instrument, shows that ICC Profile comprises that to various displays LCD and CRT use.
Summary of the invention
In view of above-mentioned one or more problems, the present invention proposes a kind of color management method and device that is used for portable terminal.
According to an aspect of the present invention, provide a kind of color management method that is used for portable terminal.This method may further comprise the steps: S102, the display screen or the parameters of pick-up head of proofreading and correct portable terminal; S104 sets up the color characteristics file of display screen or camera; And S106, storage color characteristics file under the situation of portable terminal display image, shows after using the color characteristics file to image rectification.
Wherein, under the situation that display screen is managed, when the display screen imaging is stablized, open 24 grades of gray scale chis and Meng Saier 24 colour standard colour atlas are proofreaied and correct display screen.
Wherein, under the situation that display screen is managed, step S104 may further comprise the steps: S1042-1, with finally the image GRB numerical value and the primary standard numerical value of adjusted 24 grades of gray scale chis carry out normalization and one-dimensional linear interpolation calculation; S1044-1 is according to the image GRB numerical value and the primary standard image values of final adjusted Meng Saier 24 colour standard colour atlas and use the look-up table model, the design factor matrix; And S1046-1, generate the color characteristics file of the display screen that is used for portable terminal according to the form of color characteristics file.
Wherein, under the situation that camera is managed, adopt ColorChecker DC standard color card that camera is proofreaied and correct.
Wherein, under the situation that camera is managed, step S104 may further comprise the steps: S1042-2, read the average pixel value of 1/4th areas in the middle of each color lump of the image that camera takes, and the maximal value in the average pixel value carried out normalization; S1044-2 is according to the actual value and the original value of ColorChecker DC standard color card and use the look-up table model and obtain TRC and adjust curve and matrix of coefficients; And S1046-2, generate the color characteristics file of the imaging moiety of camera according to the characteristic file form.
Wherein, the look-up table model is the look-up table model of the File Format forColor Profiles standard approval of ICC international color consortium formulation.
According to a further aspect in the invention, provide a kind of color management apparatus that is used for portable terminal.This device comprises: parameter correction unit, the display screen or the parameters of pick-up head that are used to proofread and correct portable terminal; The color characteristics file is set up the unit, is used to set up the color characteristics file of display screen or camera; And image correction unit, storage color characteristics file under the situation of portable terminal display image, shows after using the color characteristics file to image rectification.
Wherein, under the situation that display screen is managed, parameter correction unit adopts 24 grades of gray scale chis and Meng Saier 24 colour standard colour atlas to proofread and correct display screen.
Wherein, under the situation that camera is managed, parameter correction unit adopts ColorChecker DC standard color card that camera is proofreaied and correct.
Wherein, color characteristics document creation unit comprises: the normalization unit, be used under the situation of the color characteristics file of creating display screen, with finally the image GRB numerical value and the primary standard numerical value of adjusted 24 grades of gray scale chis carry out normalization and one-dimensional linear interpolation calculation; Under the situation of the color characteristics file of creating camera, read the average pixel value of 1/4th areas in the middle of each color lump of the image that camera takes, and the maximal value in the average pixel value is carried out normalization; The coefficient acquiring unit is used under the situation of the color characteristics file of creating display screen, according to the image GRB numerical value and the primary standard image values of final adjusted Meng Saier 24 colour standard colour atlas and use the look-up table model, the design factor matrix; Under the situation of the color characteristics file of creating camera, according to the actual value and the original value of ColorChecker DC standard color card and use the look-up table model and obtain TRC and adjust curve and matrix of coefficients; And the document creation unit, be used for being used for the display screen of portable terminal or the color characteristics file of camera according to the form generation of color characteristics file.
Wherein, the look-up table model is the look-up table model of the File Format forColor Profiles standard approval of ICC international color consortium formulation.
The present invention relates to that operand is little, complexity is lower, be suitable for software and realize; Can increase the performance of hardware by software greatly, the deficiencies such as colour cast that compensation hardware brings; And less demanding to desired user, easy operating.In addition,, can reach the effect of " What You See Is What You Get ", and can effectively compensate the colour cast problem that hardware performance is brought, thereby shorten the R﹠D cycle shortening, make things convenient for Project Realization by software by the present invention.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Figure 1A to Fig. 1 C is according to the color management method that is used for portable terminal of the embodiment of the invention and the process flow diagram of step thereof;
Fig. 2 is the look-up table model of approving in File Format for Color Profiles (Version 4.1.0) standard of ICC international color consortium appointment;
Fig. 3 is the general structure of ICC Profile file;
Fig. 4 is the process flow diagram according to the color of image management method of the display screen of the portable terminal of the embodiment of the invention;
Fig. 5 is the process flow diagram according to the color of image management method of the camera of the portable terminal of the embodiment of the invention; And
Fig. 6 is the block diagram according to the color management apparatus that is used for portable terminal of the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
The present invention proposes a kind of method of coming the color characteristics in the managing mobile terminal by ICC Profile device characteristics file.Wherein, the color characteristics in the portable terminal comprises the color representation ability of display screen and the color restoration capability of camera pictures taken.
File Format for ColorProfiles (Version 4.1.0) standard that the present invention formulates according to the ICC international color consortium realizes the management of color in the portable terminal, generate ICC Profile file according to the adjusted result of user, be used for the picture of portable terminal is shown, and the ICC Profile file storage of hardware attributes of camera part that will represent portable terminal is in picture shot, thereby can effectively proofread and correct because the colour cast problem that hardware reason brings.
Figure 1A shows the process flow diagram according to the color management method that is used for portable terminal of the embodiment of the invention.Shown in Figure 1A, may further comprise the steps: S102, the display screen or the parameters of pick-up head of proofreading and correct portable terminal according to the color management method that is used for portable terminal of the embodiment of the invention; S104 sets up the color characteristics file of display screen or camera; And S106, storage color characteristics file under the situation of portable terminal display image, shows after using the color characteristics file to image rectification.
Under the situation that display screen is managed, when the display screen imaging is stablized, open 24 grades of gray scale chis and Meng Saier 24 colour standard colour atlas are proofreaied and correct display screen.Shown in Figure 1B, under the situation that display screen is managed, step S104 may further comprise the steps: S1042-1, with finally the image GRB numerical value and the primary standard numerical value of adjusted 24 grades of gray scale chis carry out normalization and one-dimensional linear interpolation calculation; S1044-1 is according to the image GRB numerical value and the primary standard image values of final adjusted Meng Saier 24 colour standard colour atlas and use the look-up table model, the design factor matrix; And S1046-1, generate the color characteristics file of the display screen that is used for portable terminal according to the form of color characteristics file.
Under the situation that camera is managed, adopt ColorChecker DC standard color card that camera is proofreaied and correct.Shown in Fig. 1 C, under the situation that camera is managed, step S104 may further comprise the steps: S1042-2, read the average pixel value of 1/4th areas in the middle of each color lump of the image that camera takes, and the maximal value in the average pixel value carried out normalization; S1044-2 is according to the actual value and the original value of ColorChecker DC standard color card and use the look-up table model and obtain TRC and adjust curve and matrix of coefficients; And S1046-2, generate the color characteristics file of the imaging moiety of camera according to the characteristic file form.
Wherein, the look-up table model is the look-up table model of the File Format forColor Profiles standard approval of ICC international color consortium formulation.
Fig. 2 shows the look-up table model of approving in File Format for ColorProfiles (Version 4.1.0) standard of ICC international color consortium appointment.As can be seen from Figure 2, this model comprises that one 3 * 3 matrix, three one dimensions input tables, a multidimensional table (CLUT), three one dimensions outputs show.Wherein, 3 * 3 matrixes are specially at the XYZ value of input data, and the color space of mobile phone is RGB, so this 3 * 3 matrix is defined as unit matrix; Each one dimension input table is an one-dimension array, with R, G, the B value of input from 0～255 ruleization to 0～65535, store into respectively in three one-dimension array; The output of one dimension input table is the input of multidimensional table, finish from the conversion of rgb color space by the multidimensional table to the PCS color space, can adopt several different methods to create the multidimensional table, this system uses polynomial regression algorithm, and last result also needs ruleization between 0～65535; Each output table also is an one-dimension array, and data can obtain from the transformation result of a color space to another color space after the output table transform.
The arrangement mode of corresponding 3 * 3 matrixes is:
The advantage of this model is precision height, dirigibility height, is fit to any equipment, is present the most frequently used algorithm model, in order further to improve precision, has adopted 3 * 11 matrixes in the embodiment of the invention.
Fig. 3 shows the general structure of ICC Profile file.As can be seen from Figure 3, ICC Profile file structure mainly comprises three parts: file header, label list and tag element data.File header accounts for 128 bytes altogether, mainly comprises tag file size, color management module (CMM) type, device color spaces, PCS space, color matching method (Rendering Intent), and the tristimulus values XYZ of the light source (D50) in PCS space etc.Wherein, label list mainly comprises: the used total number of labels and the explanation of each label among the feature description file Profile.Wherein, total number of labels accounts for 4 bytes; The explanation of each label accounts for 12 bytes, and preceding 4 bytes are label identifier, and middle 4 bytes are the label byte offsets that begins to locate with respect to the feature description file for this reason, back 4 length that byte is these tag element data.The tag element data are used for the color space transformation data between the storage equipment color space and the PCS space.The size of each label has nothing in common with each other.
Fig. 4 shows the process flow diagram according to the color of image management method of the display screen of the portable terminal of the embodiment of the invention.Portable terminal among Fig. 4 is that example describes with the mobile phone.As shown in Figure 4, the color management method of the display screen of portable terminal may further comprise the steps:
S402 proofreaies and correct the LCD display curtain of mobile phone, so just can guarantee to measure and generate under the stable imaging state of screen the color characteristics file of this display screen.Wherein, mobile phone screen need be opened 30 minutes at least, could be guaranteed the stable of screen imaging like this; The light of workplace is controlled under the colour temperature of standard, preferably near 5500K daylight colour temperature.
S404 opens 24 grades of gray scale chis and Meng Saier 24 colour standard colour atlas successively, is used for adjusting brightness, contrast, middle tone, white and the color balance of screen.
S406, the brightness of adjustment screen, contrast, middle tone, white and color balance are till satisfaction.Concrete set-up procedure comes guides user to finish step by step by the screen correction menu of cell phone software.
S408 carries out normalization and one-dimensional linear interpolation calculation with the image RGB numerical value and the primary standard numerical value of 24 grades of gray scale chis finally adjusting, draws the mean value of the pixel RGB of each color lump;
S410, the look-up table model of approving in File Format forColor Profiles (Version 4.1.0) standard that the image RGB numerical value of the Meng Saier 24 colour standard colour atlas finally adjusted and original standard picture numerical value are formulated according to the ICC international color consortium calculates, adopt the polynomial regression method of look-up table model herein, obtain this matrix of coefficients.
Arthmetic statement suc as formula:
S412 generates the ICC Profile file of this LCD of mobile phone color display screen according to the Profile file layout of this standard formulation.
Wherein, the necessary label the inside at the look-up table model the most important thing is the AToB label, and all color conversion values all are stored in the AToB label.The data type of AToB label is lut8Type, lut16Type or lutAtoBType.Present embodiment has been selected the lut16Type data type for use, the one-dimension array that the input table is made up of 16 signless integers, one total R, G, three one-dimension array of B, each array has minimum 2, maximum 4096 16 integers, puts with these and represents the input value linearization curve.Each data of input table are all standardized between 0～65535.The byte number of whole input table is: inlet number * 2 of input channel number * each input table.The output of input table is as the input of multidimensional lookup table (CLUT).
Wherein, CLUT is the most important thing of whole AtoB label, in order to improve the precision of CLUT, carry out rasterizing to it.The precision that how much directly has influence on the color data conversion of grid point (GridPoints), the multidata conversion accuracy is high more more for point, but the speed that how much also influences data-switching of grid point, grid point is many more, data-switching speed is slow more, therefore will reduce the number of grid point under the prerequisite that guarantees the color conversion precision as far as possible.The byte number of CLUT table is: grid point input channel number * output channel number * 2.Each output data of CLUT all rule for the output valve of the input data of trying to achieve a non-CLUT (non-grid point), must be taked the method for multi-dimensional interpolation between 0～65535, and the output data of CLUT table is as the input of one dimension output table.
Output table is the same with the input table, the also one-dimension array of forming by 16 signless integers, and each array has minimum 2, maximum 4096 16 integers.Each data of output table are all standardized between 0～65535.The byte number of whole output table is: inlet number * 2 of output channel number * each output table.Data can obtain from the transformation result of a color space to another color space after the output table transform.
Any picture that need show for mobile phone, adopt the color characteristic file to proofread and correct after demonstration again, thereby can reach the purpose of managing mobile phone LCD color display screen color.
Fig. 5 shows the process flow diagram according to the color of image management method of the camera of the portable terminal of the embodiment of the invention.As shown in Figure 5, the color of image management method of the camera of portable terminal may further comprise the steps:
S502 adopts ColorChecker DC standard color card that camera is proofreaied and correct.Wherein, ColorChecker DC is a color measuring colour table that is fit to very much the industry that is in particular the design of digital image industry.It comprises 237 color block.The ICC characteristic file that the user can measure and reduce the realistic colour scene of digital duplicate, make white balance, combine and can also create digital camera with the software of this table and establishment characteristic file for digital camera with its.The size that ColorChecker DC has following feature: a, whole color table is 8.5 " * 14 " (21.59cm * 35.56cm); It is 2.8cm * 2.8cm white color lump that there is a size at b, center; C, 237 color lumps are arranged in the scope of 12cm * 20cm; D, the white blocks one that comprises GTG and be positioned at the center have 177 colors; E, there is the control look of black, grey and white fast all around; The color of f, high light sample comprises the primary colors red, green, blue, and is yellow, pinkish red, blue or green, black and white.
S504, sunlight, cloudy day and three kinds of surround lightings of tungsten lamp carry out the shooting of standard color card at noon respectively, and wherein, light source color temperature should be consistent when taking standard color card and taking material object.What need manually to set white balance and guarantee colour atla is subjected to light even, need correct exposure during shooting, its determination methods is: when not adjusting exposure parameter, the RGB numerical value of the white color lump of colour atla should be taken otherwise need to change the exposure combination between 238-243 again.
S506 uses writing pencil to determine the upper left corner of colour atla and the position in the lower right corner, with software image is reduced and the position adjustment.
S508 reads the average pixel value of centre 1/4th areas of each color lump on the photographic images, gets maximal value and carries out normalization and calculate.
S510 calculates according to the actual value and the original value of standard color card, uses the look-up table model and draws the matrix of coefficients that TRC adjusts curve and 3*11.
S512 is according to the color characteristic file of the mobile phone cam imaging moiety under three kinds of situations of ICC Profile file layout generation of standard code.
S514 judges whether to be stored as the picture that has ICC Profile.
S516 if store the picture that has ICC Profile, then selects corresponding ICCProfile file, and is embedded in the picture file and stores.
S518, if do not store the picture that has ICC Profile, then direct picture.
Adopt the color management method that is used for portable terminal of the embodiment of the invention, compare with the technology that existing mobile phone manufacturer generally adopts, in the control of mobile phone color, obtain the progress of essence, reached professional effect, saved the continuous input on the hardware, the problems such as colour cast that cause by hardware reason have been proofreaied and correct effectively, improved the quality of colour of display image and photographic images, made things convenient for final cellphone subscriber, and color is consistent when having guaranteed further that photographic images transmits in different equipment.
Fig. 6 shows the block diagram according to the color management apparatus that is used for portable terminal of the embodiment of the invention.As shown in Figure 6, the color management apparatus that is used for portable terminal according to the embodiment of the invention comprises: parameter correction unit 602, the display screen or the parameters of pick-up head that are used to proofread and correct portable terminal; The color characteristics file is set up unit 604, is used to set up the color characteristics file of display screen or camera; And image correction unit 606, storage color characteristics file under the situation of portable terminal display image, shows after using the color characteristics file to image rectification.
Wherein, under the situation that display screen is managed, parameter correction unit adopts 24 grades of gray scale chis and Meng Saier 24 colour standard colour atlas to proofread and correct display screen.Under the situation that camera is managed, parameter correction unit adopts ColorChecker DC standard color card that described camera is proofreaied and correct.
Wherein, color characteristics document creation unit 604 comprises: normalization unit 6042, be used under the situation of the color characteristics file of creating display screen, with finally the image GRB numerical value and the primary standard numerical value of adjusted 24 grades of gray scale chis carry out normalization and one-dimensional linear interpolation calculation; Under the situation of the color characteristics file of creating camera, read the average pixel value of 1/4th areas in the middle of each color lump of the image that camera takes, and the maximal value in the average pixel value is carried out normalization; Coefficient acquiring unit 6044 is used under the situation of the color characteristics file of creating display screen, according to the image GRB numerical value and the primary standard image values of final adjusted Meng Saier 24 colour standard colour atlas and use the look-up table model, the design factor matrix; Under the situation of the color characteristics file of creating camera, according to the actual value and the original value of ColorChecker DC standard color card and use the look-up table model and obtain TRC and adjust curve and matrix of coefficients; And document creation unit 6046, be used for being used for the display screen of portable terminal or the color characteristics file of camera according to the form generation of color characteristics file.
Wherein, the look-up table model is the look-up table model of the File Format forColor Profiles standard approval of ICC international color consortium formulation.
The present invention relates to that operand is little, complexity is lower, be suitable for software and realize; Can increase the performance of hardware by software greatly, the deficiencies such as colour cast that compensation hardware brings; And less demanding to desired user, easy operating.In addition,, can reach the effect of " What You See Is What You Get ", and can effectively compensate the colour cast problem that hardware performance is brought, thereby shorten the R﹠D cycle, make things convenient for Project Realization by software by the present invention.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence, those of ordinary skill in the art can do various corresponding changes and distortion to the present invention, but these corresponding changes and distortion all should belong to protection scope of the present invention.
Claims (11)
1. a color management method that is used for portable terminal is characterized in that, said method comprising the steps of:
S102, the display screen or the parameters of pick-up head of proofreading and correct described portable terminal;
S104 sets up the color characteristics file of described display screen or described camera; And
S106 stores described color characteristics file, under the situation of described portable terminal display image, shows after using described color characteristics file to described image rectification.
2. color management method according to claim 1 is characterized in that, under the situation that described display screen is managed, when described display screen imaging is stablized, opens 24 grades of gray scale chis and Meng Saier 24 colour standard colour atlas are proofreaied and correct described display screen.
3. color management method according to claim 1 and 2 is characterized in that, under the situation that described display screen is managed, described step S104 may further comprise the steps:
S1042-1 is with finally the image GRB numerical value and the primary standard numerical value of adjusted 24 grades of gray scale chis carry out normalization and one-dimensional linear interpolation calculation;
S1044-1 is according to the image GRB numerical value and the primary standard image values of final adjusted Meng Saier 24 colour standard colour atlas and use the look-up table model, the design factor matrix; And
S1046-1 generates the color characteristics file of the display screen that is used for described portable terminal according to the form of color characteristics file.
4. color management method according to claim 1 is characterized in that, under the situation that described camera is managed, adopts ColorChecker DC standard color card that described camera is proofreaied and correct.
5. according to claim 1 or 4 described color management methods, it is characterized in that under the situation that described camera is managed, described step S104 may further comprise the steps:
S1042-2 reads the average pixel value of 1/4th areas in the middle of each color lump of the image that described camera takes, and the maximal value in the described average pixel value is carried out normalization;
S1044-2 is according to the actual value and the original value of described ColorChecker DC standard color card and use the look-up table model and obtain TRC and adjust curve and matrix of coefficients; And
S1046-2 generates the color characteristics file of the imaging moiety of described camera according to described characteristic file form.
6. according to claim 3 or 5 described color management methods, it is characterized in that the look-up table model that the File Format for ColorProfiles standard that described look-up table model is formulated for the ICC international color consortium is approved.
7. color management apparatus that is used for portable terminal is characterized in that comprising:
Parameter correction unit, the display screen or the parameters of pick-up head that are used to proofread and correct described portable terminal;
The color characteristics file is set up the unit, is used to set up the color characteristics file of described display screen or described camera; And
Image correction unit is stored described color characteristics file, under the situation of described portable terminal display image, shows after using described color characteristics file to described image rectification.
8. color management apparatus according to claim 7 is characterized in that, under the situation that described display screen is managed, described parameter correction unit adopts 24 grades of gray scale chis and Meng Saier 24 colour standard colour atlas to proofread and correct described display screen.
9. color management apparatus according to claim 7 is characterized in that, under the situation that described camera is managed, described parameter correction unit adopts ColorChecker DC standard color card that described camera is proofreaied and correct.
10. according to each described color management apparatus in the claim 7 to 9, it is characterized in that described color characteristics document creation unit comprises:
The normalization unit is used under the situation of the color characteristics file of creating described display screen, with finally the image GRB numerical value and the primary standard numerical value of adjusted 24 grades of gray scale chis carry out normalization and one-dimensional linear interpolation calculation; Under the situation of the color characteristics file of creating described camera, read the average pixel value of 1/4th areas in the middle of each color lump of the image that described camera takes, and the maximal value in the described average pixel value is carried out normalization;
The coefficient acquiring unit is used under the situation of the color characteristics file of creating described display screen, according to the image GRB numerical value and the primary standard image values of final adjusted Meng Saier 24 colour standard colour atlas and use the look-up table model, the design factor matrix; Under the situation of the color characteristics file of creating described camera, according to the actual value and the original value of described ColorChecker DC standard color card and use the look-up table model and obtain TRC and adjust curve and matrix of coefficients; And
The document creation unit is used for being used for the display screen of described portable terminal or the color characteristics file of camera according to the form generation of color characteristics file.
11. color management apparatus according to claim 10 is characterized in that, the look-up table model that the File Format for ColorProfiles standard that described look-up table model is formulated for the ICC international color consortium is approved.
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- 2007-01-18 CN CN200710003623A patent/CN100589170C/en not_active Expired - Fee Related
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