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Color correction method and integrated chip using same

A color correction and color technology, applied in the direction of color signal processing circuit, etc., can solve problems such as image deviation

Inactive Publication Date: 2010-01-27
WINTEK CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For example, if the image is generated according to the definition of the sRGB standard color gamut, the grayscale data of each pixel is the X, Y that is expected to be received by the human eye , The Z stimulus value is a certain point in the sRGB color gamut, but because the size of the color gamut of the display itself or the three vertices of pure red, pure green and pure blue are different from the sRGB color gamut, when the image data is directly input On the display, the human eye will receive different X, Y, and Z stimulus values, thus causing the aforementioned image deviation problem

Method used

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  • Color correction method and integrated chip using same
  • Color correction method and integrated chip using same
  • Color correction method and integrated chip using same

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Embodiment 1

[0030] Please refer to figure 1 , which shows a flow chart of the color correction method according to Embodiment 1 of the present invention. The color correction method includes steps S11 to S15. Starting from step S11, the gray scale values ​​of the three primary colors (red, green, blue) of the image data are converted into feature values ​​of the color space. Next, as shown in step S12, according to the relationship between the coordinate position of the standard white light defined in the color space and the coordinate position of the feature value defined in the color space and the grayscale values ​​of the three primary colors, the feature value is adjusted to generate the adjusted feature value. Then, see step S13 , measuring the three characteristic values ​​of the device to be calibrated when each displaying the three primary colors. Next, as shown in step S14, according to the three eigenvalues ​​of the device to be corrected and a color space transformation form...

Embodiment 2

[0076] Please refer to Figure 6 , which is a flow chart of the color correction method according to the second embodiment of the present invention. The color calibration method of the second embodiment is used to set the gamma characteristic curve of the device to be calibrated, such as a display, including steps S61 to S67. Step S61 is to firstly set the initial Gamma characteristic curves of the three primary colors in the device to be calibrated according to the characteristics of the device to be calibrated and the target Gamma value. Please refer to Figures 7A to 7C , which respectively show the graphs of red, green, and blue gray scale versus voltage (G-V) of the device to be calibrated before and after calibration. The red, green, and blue G-V curves obtained according to the characteristics of the device to be calibrated and the expected Gamma characteristic curve (the general target's Gamma value is 2.2) are the respective target curves of red, green, and blue. In...

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Abstract

The invention relates to a color correction method, which comprises the following steps: converting a tricolor gray-scale value of image data into a characteristic value of a color space; regulating the characteristic value according to the relationship of a coordinate position of standard white light defined by the color space and a coordinate position of the characteristic value defined in the color space, and the tricolor gray-scale value so as to generate a regulated characteristic value; measuring three characteristic values of tricolors respectively displayed on a device to be corrected; converting the regulated characteristic value into a brightness value after tricolor regulation according to the three characteristic values of the device to be corrected and a color space transformation equation; and measuring gamma property curves of tricolors respectively displayed on the device to be corrected, and modeling a respective gamma property curve of the measured tricolors to generate a respective new relationship of the gray scale and the brightness of the tricolors; therefore, a gray-scale value of the tricolors after regulation corresponding to the brightness value of the tricolors after regulation is acquired.

Description

technical field [0001] The present invention relates to a color correction method and an integrated chip with color correction function, and in particular to a color correction method applicable to a display or a projector and an integrated chip with color correction function. Background technique [0002] At present, various display technologies have matured day by day, especially devices such as monitors or projectors have been widely used in the market. How to present image colors more faithfully is one of the development priorities of many manufacturers. [0003] However, limited by the characteristics of the device, the same image may not have the same effect on different devices. Taking the display as an example, traditionally, when the display receives image data, the grayscale signal of the image data is directly stored in the random-access memory (RAM) of the display, and the grayscale signal is stored according to the gamma (Gamma) The voltage corresponds to the ...

Claims

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Application Information

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IPC IPC(8): H04N9/64H04N9/69
Inventor 李俊贤赖志章
Owner WINTEK CORP
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