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Method for enhancing sharpness of color image with color constancy

A color image and color constancy technology, applied in the field of image processing, can solve the problems of insufficient color image clarity and color distortion, and achieve the effect of ensuring the calculation effect, reducing the amount of calculation, and avoiding color distortion.

Active Publication Date: 2016-09-07
深圳市和天创科技股份有限公司
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Problems solved by technology

[0006] The present invention aims to solve the problem that the existing color image is prone to lack of definition and the problem of easy color distortion in the process of enhancing the definition, and provides a color image definition enhancement method with constant color

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[0038] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] The present invention mainly comprises the following steps:

[0040] (1) Calculate brightness image

[0041] The brightness of the image reflects the overall brightness of the image. In various color spaces, there are methods to calculate the brightness image. Here, the simplest method is used to calculate the average value of the three bands of the color image:

[0042] I=(R+G+B) / 3

[0043] Among them, R, G, and B are the red, green, and blue bands of the image, respectively.

[0044] (2) Calculate neighborhood mean image and neighborhood standard deviation im...

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Abstract

The invention discloses a method for enhancing sharpness of color image with color constancy. The method includes the following steps: based on the red, green and blue three wave bands of an image, calculating a brightness image; setting a neighborhood radius, calculating mean value and standard difference of the brightness image in each pixel neighborhood, obtaining an neighborhood mean value image and a neighborhood standard difference image; based on the neighborhood mean value image and the neighborhood standard difference image, conducting adaptive calculation on weight of each pixel point; based on the neighborhood mean value image and the weights, recalculating a new brightness image; in accordance with the theory of color constancy, based on the new brightness image and an original brightness image, conducting same ratio enhancement on the three wave bands of the original image, obtaining the image with enhanced sharpness with color constancy. According to the invention, the method can greatly increase image sharpness, reduce color distortion as much as possible, maintain color constancy, and effectively increase visual effects of the image.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a color image definition enhancement method with constant color. Background technique [0002] Due to the wide use of color imaging equipment in digital equipment, multimedia, biomedicine and the Internet, color image processing technology has attracted more and more attention. Due to the constraints of various factors or conditions, the quality of the obtained color image may be unsatisfactory, and the image is blurred and the definition is not high. Therefore, before the subsequent image processing, it is often necessary to enhance the color image to provide effective feature information, or improve its quality to obtain pleasing visual effects. [0003] Color images are composed of grayscale images, and the purpose of color image enhancement can be achieved through the enhancement of grayscale images. The main methods of grayscale image enhancement, such as: contras...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/20004G06T2207/10024G06T5/73
Inventor 李勤俭陈勇陈波胡诗帅
Owner 深圳市和天创科技股份有限公司
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