Method for quickly demisting single image

A single image, image technology, applied in the field of computer vision, can solve the problem that the running speed needs to be improved, and achieve the effect of reducing the computational complexity, improving the speed, and ensuring the rationality
CN102289791BActive Publication Date: 2013-05-29TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2013-05-29

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Abstract

The invention discloses a method for quickly demisting a single color image and a method for quickly demisting a single gray level image. The method for demisting a single color image comprises the following steps of: obtaining an original image and obtaining a brightness matrix according to the original image; performing median filtering operation on a lowest-brightness matrix to obtain a medianfiltering matrix; obtaining an atmosphere light value based on the lowest-brightness matrix and the median filtering matrix; multiplying the median filtering matrix, the lowest-brightness matrix and the atmosphere light value with a preset proportionality factor and selecting a minimum value serving as an atmosphere dissipation function; and obtaining a demisted image based on the original image,the atmosphere light value and the atmosphere dissipation function. The method for demisting a single gray level image is a special case of the method for demisting a single color image. According tothe demisting method provided by the invention, the demisting operating speed of a single image can be increased, the demisting method can be applied to certain systems with high requirement on instantaneity, and time is won for subsequent processing.
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Description

technical field

[0001] The invention relates to a method for clearing images in the field of computer vision, in particular to a method for clearing images in foggy days, and in particular to a method for quickly defogging single images. Background technique

[0002] When capturing images under severe weather conditions, a large number of particles suspended in the atmosphere (such as fog and haze) will absorb and scatter light, resulting in a decrease in the quality of the captured image, such as blurred images, color distortion, and decreased contrast. It not only reduces the visibility of the image, but also makes it difficult for subsequent image processing algorithms (such as object recognition, feature extraction, image analysis, etc.).

[0003] At present, the defogging algorithms proposed by domestic and foreign scholars in the field of computer vision can be divided into two types based on multiple images (or other additional information) and based on only a single ...

Claims

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