Method and device for generating color calibration matrix of self-adaption gamma calibration curve
A technology of color correction and gamma correction, applied in image signal generators, color signal processing circuits, etc., can solve the problems of weakened color restoration ability of the color correction matrix and failure to consider the gamma correction curve, etc.
Inactive Publication Date: 2015-04-08
无锡鸿图微电子技术有限公司
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However, the usual color correction matrix generation method does not take into account the impact of the gamma correction curve on the final color reproduction. If the user-defined gamma correction curve is different from the standard monitor gamma correction curve, the color reproduction ability of the generated color correction matrix will be greatly weakened
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[0022] The present invention will be further described below with reference to the specific drawings and embodiments.
[0023] like figure 1 Shown: In order to improve the color reproduction ability and adaptability of the color correction matrix, the present invention includes an image sensor 104 for acquiring the original data of the color card image of the standard color card 102, the output end of the image sensor 104 and the image preprocessing The module 106 is connected, the output end of the image preprocessing module 106 is connected with the color correction matrix optimization module 108, the color correction matrix optimization module 108 also receives the gamma correction curve module 109, and the color correction matrix optimization module 108 is connected with the color correction matrix output module 110 is connected;
[0024] The image preprocessing module 106 performs the required preprocessing on the color card image raw data obtained by the image sensor 10...
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The invention relates to a method and device for generating a color calibration matrix of a self-adaption gamma calibration curve. The method comprises the following steps of: a, collecting the original color card image data of a standard color card through an image sensor; b, preprocessing to obtain color card image measurement data, and constructing an initial color calibration matrix; c, carrying out gamma calibration on the color card image measurement data; d, carrying out standard linear processing and color space conversion on the non-linear color value after the gamma calibration so as to obtain the calibrated color value; and e, comparing the calibrated color value with the standard color value of the standard color card so as to obtain a chromatic aberration value; and utilizing the initial color calibration matrix to optimize the chromatic aberration value until the optimum chromatic aberration value is obtained, and outputting the corresponding color calibration matrix. By utilizing the method, the required color calibration matrixes can be generated according to the gamma calibration curves which are customized by users, the color reproduction capability of the color calibration matrix is improved, and the application scope is wide.
Description
technical field [0001] The present invention relates to a method and device, in particular to a method and device for generating a color correction matrix of an adaptive gamma correction curve, in particular to a method and device for generating a color correction matrix in a video imaging system, which belongs to image video processing technical field. Background technique [0002] Considering that the spectral response of the human eye is different from the spectral response of the camera image sensor and display, in order to better perform color reproduction and obtain a good brightness distribution, in the actual video imaging system, a color correction module and gamma correction are added. module; usually, in the color correction module, the color correction module is done by multiplying the color value of each pixel by a color correction matrix. Among them, the color correction matrix is usually a 3x3 matrix, which is to make the image data closer to the scene seen...
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IPC IPC(8): H04N9/04H04N9/69H04N9/73
Inventor 栗兆剑
Owner 无锡鸿图微电子技术有限公司