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A method and system for image defogging including a large area of ​​sky

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: 2019-11-22
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 square effect or color distortion in the image caused by the single image defogging algorithm based on assumptions or prior knowledge in the prior art question

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  • A method and system for image defogging including a large area of ​​sky

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[0058] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0059] figure 1 Shows the implementation flow chart of the image defogging method including a large sky area provided by the present invention, which specifically includes the following steps:

[0060] In step S101, quadtree segmentation is performed on the photographed foggy image I(x), the foggy image is divided into a plurality of image regions, and seed points are obtained in the plurality of image regions.

[0061] In this step, in order to find the sky area in the foggy image, the quadtree segmentation algorithm is used to process the foggy image, namely:

[0062] First, the foggy image is ...

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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 of ​​sky. Background technique [0002] Accurate extraction of image features is a key factor for the normal operation of computer vision. However, in fields such as fog, haze, smoke, and water vapor, the radiated light is scattered by atmospheric particles, resulting in reduced visibility of the scene and severe degradation of image quality. Vagueness and serious color distortion will greatly limit the effectiveness of the system, and even cause 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 defog the degraded image in fog. [0003] In recent years, a single image defogging algorithm containing a large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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