Color information interpolating method

Abstract

The invention discloses a color information interpolating method. The color information interpolating method includes: receiving luminance information of a pixel matrix, wherein the luminance information is in Bayer pattern array and records specific color information of each pixel of the pixel matrix, and the specific color information is one of red information, green information and blue information; computing a horizontal detail variation amount and a vertical detail variation amount of each pixel according to the luminance information; and interpolating each pixel in the luminance information by one of a horizontal color information estimation value, a vertical color information estimation value and a non-directional color information estimation value according to the horizontal detail variation amount and the vertical detail variation amount, so that color information in each pixel except for the specific color information is obtained.

Description

technical field [0001] The present invention relates to a color information interpolation method, in particular to a color information interpolation method which can adjust image contrast and judge with detail variation and color difference variation average to increase image detail direction judgment. Background technique [0002] Generally speaking, in order to save cost, when the pixel matrix of a consumer image sensor senses an image to generate luminance information, the luminance information is arranged in a Bayer pattern, that is, only the information of each pixel in the pixel matrix is ​​recorded. A specific color information, the specific color information is one of red color information, green color information and blue color information. Therefore, when an image processor receives the luminance information, it needs to use interpolation (Interpolation) operation to reconstruct the lost color information, so that each pixel has three kinds of color information. ...

AI Technical Summary

Problems solved by technology

For the bilinear interpolation method, the lost color information is interpolated using the bilinear method. The main disadvantage is that it will cause blurred images and serious false colors, and it is easy to make mistakes at the edge; For the boundary interpolation method, it uses the horizontal and vertical direction to determine the missing color information for direction interpolation. The main disadvantage is that the accuracy of the direction determination of the subtle boundary is not high, for example, it cannot If you know the directionality, you will make a wrong judgment, and a grid pattern will appear on the image (for example, if it is originally judged to be horizontal, it is judged to be vertical); and for the minimum color difference judgment interpolation method, it uses the lost color information and the minimum color of adjacent pixels. Direction interpolation is carried out by interpolation. The main disadvantage is that the accuracy of direction determination at high-frequency images is not high.

[0004] It can be seen from the above that, since the known technology fixedly uses one of the bilinear interpolation method, the boundary interpolation method and the minimum color difference judgment interpolation method when performing interpolation, it may cause blurred images or determine the correct rate at high frequency places in the image. not tall

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