A real time processing method and real time processing circuit for color domain mapping
A technology of real-time processing and color gamut mapping, applied in cathode ray tube indicators, instruments, static indicators, etc., can solve the problems of consuming large hardware resources and large amount of calculation, so as to simplify the board design and occupy less hardware resources. , the effect of fast calculation
Inactive Publication Date: 2009-12-23
PHOEBUS VISION OPTO ELECTRONICS TECH +1
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The disadvantage of this method is that the trilinear interpolation algorithm needs to perform iterative interpolation calculations on eight points, which requires a large amount of calculation and consumes a lot of hardware resources, so it also limits the maximum allowable operating frequency - in the FPGA chip of xilinx company Experiments on SpartanIII xc3s400 show that the circuit realized by combining eight sets of one-dimensional lookup tables and trilinear interpolation proposed by Dongil Han has a maximum operating frequency close to 60M Hz
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[0041] Figure 4 It is a flowchart of the implementation of the method of the present invention, comprising the following steps:
[0042] 1) Store the representative calibration color data into four sets of look-up table memories respectively;
[0043] 2) input the original color data to be corrected, extract four grid points in the original color space according to the original color data, and decode to obtain the storage addresses of the four grid points (ie four representative original color data);
[0044] 3) Find the representative corrected color data of the four grid points respectively according to the storage address;
[0045] 4) According to the representative corrected color data of the four grid points and the input original color data to be corrected, an interpolation operation is performed with a tetrahedral interpolation algorithm to obtain the final corrected color data.
[0046] Among the above four steps, the step of storing the representative color data in...
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The present invention relates to a real-time processing method of color gamut mapping and a real-time processing circuit, wherein the processing method includes: 1) storing representative color data into four sets of look-up table memories; 2) inputting the original color data to be corrected, according to the original The color data extracts four grid points in the original color space, and decodes to obtain the storage addresses of the four grid points; 3) respectively finds the representative corrected color data of the four grid points according to the storage addresses; 4) according to the The representative corrected color data of the above four grid points and the input original color data to be corrected are interpolated by a tetrahedral interpolation algorithm to obtain the final corrected color data. The processing circuit includes address decoder, four sets of look-up table memory and interpolation circuit. Compared with the prior art, the present invention combines the color mapping look-up table with the tetrahedron interpolation algorithm, saves hardware resources, and increases the working frequency at the same time, thereby effectively increasing the computing speed.
Description
technical field [0001] The invention belongs to the field of color signal processing, in particular, the invention relates to a color gamut mapping processing method and a processing circuit. Background technique [0002] Currently, there are various types of display devices on the market. In order to achieve color matching between display devices with different color gamuts and color characteristics, people study various color gamut mapping methods. In terms of hardware processing, color gamut mapping can be realized by combining a color mapping lookup table with three-dimensional interpolation. This method mainly includes three steps: packaging, extraction and interpolation. Among them, packaging refers to the discrete sampling of the original color space in a three-dimensional grid; the original data corresponding to the sampling grid points is called the representative original color data, and the corrected color data corresponding to these original data (different types...
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IPC IPC(8): G09G5/06G09G5/02
Inventor 张明勇王延伟毕勇贾中达王斌
Owner PHOEBUS VISION OPTO ELECTRONICS TECH