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
CN106204494AActive Publication Date: 2016-12-07WEIFANG UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
WEIFANG UNIVERSITY
Publication Date
2016-12-07

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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.
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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...

Claims

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