CN100484253C - Color calibration method of display and apparatus thereof - Google Patents
Color calibration method of display and apparatus thereof Download PDFInfo
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- CN100484253C CN100484253C CNB2005101234799A CN200510123479A CN100484253C CN 100484253 C CN100484253 C CN 100484253C CN B2005101234799 A CNB2005101234799 A CN B2005101234799A CN 200510123479 A CN200510123479 A CN 200510123479A CN 100484253 C CN100484253 C CN 100484253C
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Abstract
This invention relates to one display color correction method and its device, which uses to compute first color signal RGB signal level to get relative RGB signal level color area through computation in research process and then gets relative gamma value through color area to mend first color signal to generate second color signal to correct first color signal, wherein, this method can meet low cost and automatic color correction require to get best image quality require.
Description
Technical field
The present invention relates to a kind of color correcting method and device thereof, particularly relate to a kind of color correcting method and device thereof that utilizes the display of gamma value (Gamma value).
Background technology
Along with the development of Display Technique reaches its maturity, characteristics such as its light, thin, portable and power saving, be applied in widely on the 3C Product, human work and life style have been changed gradually, and become the important interface of man-machine communication, so the key role that following digital 3C shows future development trend has been played the part of in the development of Display Technique.
But just present, known display is when dispatching from the factory, and the coloured light performance of redness (Red) that all can the adjustment display, green (Green) and blue (Blue) is to obtain correct output color; So; after the user buys display; if under varying environment; for example light too secretly or too strong; during display image; usually have different color performances, this moment, the user just must proofread and correct red, the green and blue coloured light brightness value of projector's output in manual mode, could allow the user obtain satisfied color performance.Therefore, when surrounding environment constantly changed, the user was able to manual mode and proofreaies and correct the output color, just can obtain satisfied color representation, quite inconvenience concerning the user.
Moreover, the display unit that another kind of traditional correcting colour images method is also proofreaied and correct to desire by peripheral device input color test pattern (color bar pattern), for example during the correcting computer screen just by hard disk or peripheral storage device such as CD-ROM drive or floppy drive etc., output color test pattern places on the computer screen; And if when desiring correcting TV machine screen, then can export on the television screen by the color test pattern that videocorder or TV station transmit, proofread and correct the color test pattern by the filter of single colored light again, to reach the purpose of correction,, display still can know the demonstration relevant information so that being under the various environmental conditions.
Because the color of display synthesize by three kinds of coloured light of red, green, blue, and just can adjustment go out other color,, need specifically environmental correction display of basis in order on display, to present best image effect by proofreading and correct these three primary colours.But the control operation of manual correction image has confirmed it is quite complicated, therefore, how not using the manual correction image process to obtain the best overall image quality, becomes one of research staff's problem to be solved.
Summary of the invention
In view of above problem, main purpose of the present invention is to provide a kind of color correcting method and device thereof of display, solves the existing problem of prior art whereby.
For reaching above-mentioned purpose, the color correcting method of the display that the present invention is disclosed includes input at least in display, to receive first chrominance signal, include the following step: at first, store gamma option table and predetermined percentage; First chrominance signal is decoded, and export the rgb signal level value of corresponding RGB (RGB); Then, calculate the RGB percentage of rgb signal level value, and confirm that RGB percentage is not less than predetermined percentage; Search the color area table with this RGB percentage, to obtain the color area of corresponding RGB percentage; Obtain the gamma value of corresponding color area with the gamma option table; And proofread and correct first chrominance signal with gamma value, produce second chrominance signal.
For reaching above-mentioned purpose, the display color means for correcting that the present invention is disclosed, display includes input at least, to receive first chrominance signal, it includes: color decoding unit, color arithmetic element, color comparing unit, color area judgement unit, gamma selected cell and color correction unit.The color decoding unit is decoded first chrominance signal, and exports the rgb signal level value of corresponding RGB (RGB), and the color arithmetic element is calculated the RGB percentage of rgb signal level value.Be provided with predetermined percentage in the color comparing unit, after relatively RGB percentage is not less than predetermined percentage, obtain the unit, contain the color area table, search the color area that this color area table is obtained corresponding RGB percentage with this RGB percentage by color area.The gamma selected cell includes the gamma option table, obtains the gamma value of corresponding color area with the gamma option table.At last, color correction unit is proofreaied and correct first chrominance signal that input receives with gamma value, to produce second chrominance signal.
The color correcting method of disclosed display and device thereof according to the present invention, be to utilize the correction gamma value to proofread and correct first chrominance signal, and then the lightness of change color, its main feature is to pass through the manual correction image process, can obtain the requirement of the best overall image quality of display.
Below in execution mode, be described in detail the present invention's detailed features and advantage, its content is enough to make any person of ordinary skill in the field to understand technology contents of the present invention and implements according to this, and according to the disclosed content of this specification, claim and accompanying drawing, any person of ordinary skill in the field can understand relevant purpose of the present invention and advantage easily.
Description of drawings
Fig. 1 is the flow chart of the color correcting method of the display disclosed according to the present invention; And
Fig. 2 is the block diagram of the colour correcting apparatus of the display disclosed according to the present invention.
The main element description of symbols
10 color decoding units
20 color arithmetic elements
30 color comparing units
40 color area obtain the unit
41 color area tables
42 color area are searched element
50 gamma selected cells
51 gamma option tables
52 gammas are searched element
60 color correction unit
70 color display panel units
Embodiment
Obtain the best overall image quality on display, the colour correction mode of display is an important step.Moreover the color quality of display also can influence input/output unit, can change because of the color of display as the color of scanner and printer output.Therefore, display can guarantee that display and input/output unit all meet state or the condition of being formulated by manufacturer if can proofread and correct the color of display according to the difference of environment at any time.
The disclosed color correcting method of the present invention is a screen of a series of chrominance signals being delivered to display, comes shown color of driving display and color lightness by revising its gamma value (Gamma value).
So-called gamma value (Gamma value) is meant input and the relation of exporting, and also is that gamma value is exactly rgb value in the archives (input) in display system, exports the relation of (output) with the light of display.Generally speaking, display is if want the complete high-quality colour picture (no matter being the picture of high brightness or the picture of low-light level) that shows, then the contrast of display seldom must be more than the 5000:1, and present display is because the consideration of cost, in the time of can only making 500～1000:1, just must utilize gamma value to do correction, just select higher gamma value (as 2 or 3 at darker film, even 4), to obtain more dark portion level; Opposite then selects lower gamma value (as 0 ,-1 even-2) so that the highlights level can be clearly more demarcated at some brighter films (outdoor scene are more).That is to say that more shallow when the lower color of gamma value, the high more color of gamma value is dark more.
Please refer to " Fig. 1 ", be the flow chart of the color correcting method of the display disclosed according to the present invention.In display, include input at least, to receive TV station or cable television operators' first chrominance signal, or receive first chrominance signal of various storage devices, videocorder for example, device such as memory or CD-ROM drive, method of the present invention includes the following step: at first, store gamma option table 51, color area table 41 and predetermined percentage (step 100), gamma option table 51 also is to store a plurality of gamma values, the corresponding different color of each gamma value zone, and color area table 41 stores a plurality of color area, the RGB percentage that each color area is corresponding different, predetermined percentage can be storage in advance or imports predetermined percentage, for example contact panel manually by inputting interface, digital keys or other have the interface of input function.Then, to the decoding of first chrominance signal, export the rgb signal level value (step 110) of corresponding RGB (RGB), also be that first chrominance signal that input received of display is decoded, producing YUV signal, and the YUV signal format conversion be the rgb signal level value of correspondence.
Then, calculating the RGB percentage (step 120) of rgb signal level value, also is the ratio of rgb signal level value, and confirms that RGB percentage is not less than predetermined percentage (step 130), predetermined percentage is the standard whether conduct proofreaies and correct color, and the value of its predetermined percentage can be 1%～100%.When RGB percentage during, carry out end step less than predetermined percentage.
Then, search color area table 41 (step 139) with RGB percentage, to obtain the color area (step 140) of corresponding RGB percentage, also be that differentiation rgb signal level value falls within which color area in the color area table 41, wherein color area table 41 includes a plurality of color area.
Then, obtain the gamma value (step 150) of corresponding color area with gamma option table 51 after, proofread and correct first chrominance signal with gamma value, produce second chrominance signal (step 160).At last, show second chrominance signal (step 170), also can wait to show second chrominance signal by liquid crystal panel, CRT screen or television screen.
Please refer to Fig. 2, block diagram for the colour correcting apparatus of the display disclosed according to the present invention, in display, include input at least, to receive TV station or cable television operators' first chrominance signal, or receive first chrominance signal of various storage devices, videocorder for example, device such as memory or CD-ROM drive, colour correcting apparatus of the present invention includes: color decoding unit 10, color arithmetic element 20, color comparing unit 30, color area obtains unit 40, gamma selected cell 50, color correction unit 60 and color display panel unit 70.Operation that it is detailed and connection square frame will be described in following paragraph.
Color arithmetic element 20 is calculated the RGB percentage of rgb signal level value, also is the ratio of rgb signal.
Color area obtains that unit 40 includes color area table 41 and color area is searched element 42.Color area is searched element 42 and is searched color area table 41 with RGB percentage earlier, to obtain corresponding color area, also be that differentiation rgb signal level value falls within which color area in the color area table 41, wherein color area table 41 includes a plurality of color area.
Gamma selected cell 50 is to set up gamma option table 51 in advance, is to search element 52 by gamma to obtain gamma value according to distributed areas to gamma option table 51, wherein stores a plurality of gamma values in the gamma option table 51, the corresponding different color of each gamma value zone.
Economic benefit with display is considered, if it is very high what specific luminance was done, several times possibly of the cost prices of then paying, so the utilize gamma value modification method disclosed according to the present invention satisfies low cost simultaneously and need not pass through the manual correction image process, can obtain the requirement of best overall image quality.
Though the present invention discloses as above with aforementioned embodiment, so it is not in order to limit the present invention.Without departing from the spirit and scope of the invention, institute changes for it and improves, and all belongs to the present invention's scope of patent protection.Please refer to claim about the protection range that the present invention defined.
Claims (9)
1. the color correcting method of a display is characterized in that this display includes an input at least, to receive first chrominance signal, comprises the following step:
Store gamma option table and predetermined percentage;
This first chrominance signal is decoded, and export the rgb signal level value of corresponding RGB (RGB);
Calculate the RGB percentage of this rgb signal level value;
When this RGB percentage is not less than this predetermined percentage;
Search the color area table with this RGB percentage, to obtain to color area that should RGB percentage;
Obtain gamma value that should color area with this gamma option table; And
Proofread and correct this first chrominance signal with this gamma value, produce second chrominance signal.
2. the color correcting method of display according to claim 1 is characterized in that also including the following step:
Store the color area table, this color area table stores a plurality of color area, the RGB percentage that each color area is all corresponding different; And
Show this second chrominance signal.
3. the color correcting method of display according to claim 1 is characterized in that this confirms that this RGB percentage is not less than in the step of this predetermined percentage, when this RGB percentage during less than this predetermined percentage, carries out end step.
4. the color correcting method of display according to claim 1 is characterized in that this gamma option table stores a plurality of gamma values, the corresponding different color of each gamma value zone.
5. the colour correcting apparatus of a display is characterized in that this display includes input at least, to receive first chrominance signal, includes:
The color decoding unit is decoded this first chrominance signal, and exports the rgb signal level value of corresponding RGB (RGB);
The color arithmetic element is calculated the RGB percentage of this rgb signal level value;
The color comparing unit contains predetermined percentage, and relatively this RGB percentage is not less than this predetermined percentage;
Color area obtains the unit, contains the color area table, searches this color area table with this RGB percentage and obtains color area that should RGB percentage;
The gamma selected cell contains the gamma option table, obtains gamma value that should color area with this gamma option table; And
Color correction unit is proofreaied and correct this first chrominance signal with this gamma value, produces second chrominance signal.
6. the colour correcting apparatus of display according to claim 5 is characterized in that also including the color display panel unit, is connected to this color correction unit, in order to show this second chrominance signal.
7. the colour correcting apparatus of display according to claim 5 is characterized in that this gamma option table stores a plurality of gamma values, the corresponding different color of each gamma value zone.
8. the colour correcting apparatus of display according to claim 5 is characterized in that this gamma selected cell includes gamma and searches element, is to search this gamma option table with this color area, obtains this corresponding gamma value.
9. the colour correcting apparatus of display according to claim 5 is characterized in that this color area obtains the unit and also includes color area and search element, searches this color area table with this RGB percentage, obtains this corresponding color area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101234799A CN100484253C (en) | 2005-11-22 | 2005-11-22 | Color calibration method of display and apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101234799A CN100484253C (en) | 2005-11-22 | 2005-11-22 | Color calibration method of display and apparatus thereof |
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| Publication Number | Publication Date |
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| CN1972458A CN1972458A (en) | 2007-05-30 |
| CN100484253C true CN100484253C (en) | 2009-04-29 |
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| US10431139B2 (en) * | 2017-07-25 | 2019-10-01 | Lenovo (Singapore) Pte. Ltd. | Screen color calibration |
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