Method and system for carrying out vision perception high-fidelity transformation on color digital image

A digital image and visual perception technology, applied in the direction of color signal processing circuits, etc., can solve the problems that the complete boundary of visible light cannot be represented, and the quantitative description of visible light spatial characteristics cannot be fully completed, so as to achieve high-fidelity enhanced visual perception effect and maintain visual perception Hue and brightness unchanged, the effect of increasing the saturation range

Inactive Publication Date: 2012-07-25
侯克杰
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The color matching function, which is the cornerstone of modern chromaticity, cannot express the complete boundary of the spatial distribution of visible light color visual perception space in CIELAB visual perception uniform space, so that the quantitative description of the visible light spatial characteristics of human visual perception has not been fully completed so far.

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  • Method and system for carrying out vision perception high-fidelity transformation on color digital image
  • Method and system for carrying out vision perception high-fidelity transformation on color digital image
  • Method and system for carrying out vision perception high-fidelity transformation on color digital image

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Embodiment 1

[0193] Implement the high-fidelity conversion process of color digital image pixel color visual perception of the present invention.

[0194] (1) Computing the device color visual perception space hue phase plane color boundary database.

[0195] The database is completed through the calculation module of the device color visual perception space hue phase plane color boundary calculation module in the system of the present invention, and the calculation includes:

[0196] (1-1) Transform the red, green and blue primary color values ​​of the device color space into the calculation of CIELAB space L, C and h values, and transform the red, green and blue primary color values ​​of the device color space into CIELAB space L, C and h The value computation unit executes:

[0197] Electronic equipment with image display function is typically sRGB color space and D65 white field, sRGB space RGB three primary color chromaticity check:

[0198] x r，max =0.64y r，max =0.33,x g，max =0....

Embodiment 2

[0301] Embodiment 2 uses the typical system of FECr algorithm of the present invention

[0302] 11. The computer hard disk HD is used as a typical carrier for submitting the FECr algorithm. The carrier with the same function also includes CD, DVD, U disk, etc., and the FECr algorithm is called by the network with authorization. The FECr algorithm is called by the computer CPU+GPU in a program mode and runs in RAM. Color digital images are stored in the computer hard disk and called by the FECr algorithm program, and then stored back to the hard disk after being processed by the FECr algorithm. Image data can be copied in CD, DVD, U disk and other carriers and another hard disk, and can also be transmitted to a designated location through the network.

[0303] The FECr algorithm program can process single frame images and frame sequence images. The format of the single-frame image may be an uncompressed format such as .tif, .bmp, or a compressed format such as .jpg. The fram...

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Abstract

The invention relates to the field of digital image processing, in particular to a method and a system for carrying out vision perception high-fidelity transformation on a color digital image. The method comprises the steps of: (1) acquiring L (Luminance), C (Saturation) and h (hue) of numerical values of pixel colors R (Red), G (Green) and B (Blue) of the color digital image in a CIELAB (International Commission on Lumination Laboratory) space; (2) merging the pixel colors into a hue plane and a luminance sequence; (3) completing expansion of C of the pixel colors; and (4) calculating parameters of the pixel colors of the image and a saturation value CLN obtained through expansion in (3) into values of R, G and B. According to an FECr (First Epos Color) algorithm provided by the invention, under the condition that the boundary of an image color space constituted by three primary colors, namely, red, green and blue, is not changed, colors, which are more sensitive for vision, in the image are calculated and are made relatively more increased in a visible light color vision perception property, colors which are relatively less sensitive for vision perception are calculated and are increased a little or maintained unchanged, and a nonlinear regulation method in such a way can be used for obtaining a relatively obvious effect approaching an actual scene watched in a visible light color space, for image watching.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a method and system for visually perceiving high-fidelity transformation of color digital images. Background technique [0002] The use of digital quantities of the primary colors red, green and blue has been used in electronic devices to capture or display color images for decades. Although the three primary colors are selected to make the display image as faithful as possible to the real scene, due to material, technology and cost constraints, there is still a big gap between viewing the color image displayed by the three primary colors and viewing the real scene so far. These include that the color is not full enough, the light is not bright enough, and so on. [0003] The color management system represented by the ICC (International Color Consortium International Color Consortium) specification typically uses the gamma (gamma factor) index to adjust the digital quanti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64
CPCH04N9/64H04N9/68H04N9/67
Inventor 侯克杰
Owner 侯克杰
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