Defogging method and system for image containing large-area sky region

A sky area, large-area technology, applied in the field of image processing, can solve problems such as distortion, image block effect and color

Active Publication Date: 2016-12-07
WEIFANG UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide an image defogging method that includes a large area of ​​the sky, aiming to solve the problem of sq

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  • Defogging method and system for image containing large-area sky region
  • Defogging method and system for image containing large-area sky region
  • Defogging method and system for image containing large-area sky region

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[0051] 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.

[0052] figure 1 It shows the implementation flowchart of the image defogging method including large-area sky area provided by the present invention, which specifically includes the following steps:

[0053] In step S101, perform quadtree segmentation on the captured foggy image I(x), divide the foggy image into several image regions, and obtain seed points in several image regions.

[0054] In this step, in order to find out the sky area in the foggy image, the algorithm of quadtree segmentation is used to process the foggy image, namely:

[0055] First, the foggy image is divided into four image...

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Abstract

The invention relates to the technical field of image processing, and provides a defogging method and system for an image containing a large-area sky region. The method comprises the steps of carrying out quadtree segmentation on a photographed foggy image I (x), segmenting the foggy image into a plurality of image regions and obtaining seed points in the plurality of image regions; carrying out sky region growth by taking obtained seed points as bases, obtaining images containing sky regions and non-sky regions, and calculating atmosphere light values A; calculating medium transmission rates t<1 > (x) of the non-sky regions, and moreover, uniformly setting the medium transmission rate of the sky regions to be t <sky >; carrying out boundary fuzzification on the images containing the sky regions and non-sky regions and calculating to obtain gauss weighting parameters; carrying out transmission rate fusion on the sky regions and non-sky regions in the images; and calculating a defogged image J (x) according to the atmospheric scattering model of the foggy image, thereby obtaining a clear image without fog. The method and the system are especially suitable for processing the foggy and hazy image containing the large-area sky region.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image defogging method and system including a large-area sky area. Background technique [0002] Accurate extraction of image features is a key factor for the normal operation of computer vision. However, in fog, haze, smoke, water vapor and other fields, due to the scattering of radiated light by atmospheric particles, the visibility of the scene is reduced and the image quality is seriously degraded. Not only Blurred, and there will be serious color distortion, which greatly limits the effectiveness of the system, and even causes the computer vision system to fail to work properly. Therefore, in order to improve the image quality and enrich the information contained in the image, so that the system has the robustness and reliability of working in bad weather, it is necessary to dehaze the degraded image in foggy weather. [0003] In recent years, the im...

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Application Information

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IPC IPC(8): G06T5/00G06T7/00
CPCG06T5/003G06T2207/30192
Inventor 王文成吴小进刘云龙谷善茂
Owner WEIFANG UNIVERSITY
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