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Method and system for extracting atmospheric light value in haze image

A technology of atmospheric light value and extraction method, applied in the field of image processing, which can solve problems such as the complexity of the estimation process of atmospheric light value and the effect on the efficiency of image defogging

Active Publication Date: 2017-01-25
WEIFANG UNIVERSITY
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for extracting the atmospheric light value in the haze image, aiming at solving the problem that the estimation process of the atmospheric light value in the prior art is relatively complicated, thus affecting the efficiency of the entire image for dehazing

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[0047] 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.

[0048] figure 1 The flow chart of the realization of the method for extracting the atmospheric light value in the haze image provided by the present invention is shown, which specifically includes the following steps:

[0049] In step S101 , minimum value filtering is performed on any three channels of any pixel in the input image I(x,y) to obtain a minimum value filtered image M(x,y).

[0050] in, Among them, (x, y) is the pixel in the image, and c is the three-color channel of the color image.

[0051] In step S102 , perform horizontal projection on the acquired minimum value filtered image M(x...

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Abstract

The invention relates to the technical field of image processing and provides a method and a system for extracting an atmospheric light value in a haze image. The method comprises the steps as follows: performing mini-value filtering on three channels of any pixel in an input image I (x,y) to obtain a minimum filter image M (x,y); performing horizontal projection on the obtained minimum filter image M (x,y), and obtaining a maximum regional image K (x,y) after horizontal projection; performing vertical projection on the maximum regional image K (x,y), and obtaining a maximum regional image R (x,y) after vertical projection; extracting pixel values in the maximum regional image R (x,y), selecting the average value of a certain quantity of the pixel values as the atmospheric light value A, and the atmospheric light value is computed rapidly. The method and the system are applicable to images with different sizes and in different sky areas and provide conditions for rapidly dehazing of the haze image.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method and system for extracting atmospheric light values ​​in haze images. Background technique [0002] In the haze scene, the scattering effect of atmospheric particles will seriously degrade the information captured by the optical sensor, and the contrast and color fidelity in the image will be attenuated to varying degrees, which directly affects the perception of human vision and the performance of the machine vision system. Therefore, it is of great significance to study image defogging methods. Based on the image restoration method, a foggy image degradation model is established for the physical process of foggy image degradation, and the lost information in the foggy image is compensated by inversion calculation. This method is highly targeted and the dehazing effect obtained is natural, so it has received a lot of attention and has become a resea...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/20024G06T5/73
Inventor 王文成谷善茂刘云龙
Owner WEIFANG UNIVERSITY