Method, device and system for image enhancement based on YCbCr color space

An image enhancement and color space technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of long algorithm time, real-time difficulty, and image halo phenomenon.

Inactive Publication Date: 2015-01-28
IRAY TECH CO LTD
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Problems solved by technology

[0009] The purpose of the present invention is to provide an adaptive image enhancement method based on the YCbCr color space, aiming to solve the existing difficulties in processing efficiency and real-time performance based on the MSR algorithm, and the processed image is prone to light Halo phenomenon; and the algorithm based on DCP theory takes a long time and is difficult in real time

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  • Method, device and system for image enhancement based on YCbCr color space
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  • Method, device and system for image enhancement based on YCbCr color space

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[0077] In order to make the object, technical solution and advantages of 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.

[0078] The YCbCr color model is a commonly used color coding scheme in video, where Y refers to the luminance component, Cb refers to the blue chroma component, and Cr refers to the red chroma component. The human eye is more sensitive to the Y component of the video, so YCbCr is a commonly used color coding scheme in video products such as DVDs, camcorders, and digital TVs. The DCP theory: For most non-sky local areas, there are always some special pixels, and the value in at least one color channel is very small and close to zero. The atmospheric scattering model describes the degradation process...

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Abstract

The invention belongs to the technical field of image enhancement and in particular relates to a method, a device and a system for image enhancement based on a YCbCr color space. The method comprises the steps of extracting the luminance component Y in an original image according to the input original image, performing median filtering on the obtained luminance component Y and then performing normalization processing to obtain a normalized image Ym, calculating the average value avgYm of the normalized image according to Ym and judging the measure of the fog concentration of the original image according to the range of avgYm, performing MSR processing and DCP processing on the original image to obtain corresponding processed images Y1 and Y2, putting Y1 and Y2 into a formula X=aY1+bY2 to calculate an image X after fusion processing, and performing automatic contrast control optimization on the image X after the fusion processing to obtain an optimized image, wherein a and b in the formula are fusion coefficients. The method for the image enhancement based on the YCbCr color space is capable of effectively eliminating the halo and over-enhancement phenomena, and therefore, the stability and quality of the output image can be improved.

Description

technical field [0001] The invention belongs to the technical field of image enhancement, in particular to an adaptive image enhancement method based on YCbCr color space. Background technique [0002] Image enhancement processing technology has very important applications in many fields such as security monitoring. The main purpose of image enhancement is to enable the human eye to obtain better visual effects, or to facilitate computer system recognition to meet the system's needs for image information. Image feature enhancement mainly includes the processing of contrast, brightness, color, etc. At present, there is no unified objective standard for measuring image quality. The effectiveness of evaluation algorithms mainly depends on the objective perception of human eyes. With the development of computer and signal processing technology With continuous development, the requirements for clear and rich images are also increasing. [0003] However, the existing image enhanc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 李晶黄星明马兆峰秦旖旎牟道禄张勇
Owner IRAY TECH CO LTD
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