Defogging method for image with few backgrounds containing fog

An image, a small amount of technology, applied in the field of image processing, can solve the problems of dehazing image brightness and contrast reduction, and achieve the effect of high quality, simple and flexible operation, and high algorithm efficiency

Active Publication Date: 2014-04-02
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to defog an image with a smal

Method used

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  • Defogging method for image with few backgrounds containing fog
  • Defogging method for image with few backgrounds containing fog
  • Defogging method for image with few backgrounds containing fog

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] The invention provides a method for defogging an image with a small amount of background fog, comprising the following steps:

[0017] S1. Obtain the intensity histogram A of the foggy image, judge whether the histogram A satisfies a small amount of background light, and find the coordinates of the termination point on the right edge (x A ,y B );

[0018] S2. Dehaze the fogged image by using a dark channel prior algorithm;

[0019] S3. Determine the degree of defogging. If the fog is not completely removed, change the parameters and re-execute step S2;

[0020] S4, if the fog has been removed, find the histogram B of the fog-removed image, and mark the starting point coordinates of the right edge of the peak value (x H ,y H ), the end point coordinates of the right edge of the marker (x L ,y L );

[0021] S5, stretching...

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Abstract

The invention discloses a defogging method for an image with few backgrounds containing fog. The defogging method comprises the steps of S1, obtaining an intensity histogram A of a fog-containing image, judging whether the condition of containing little background light is met or not, and determining the coordinates of a termination point of a right boundary; S2, defogging the fog-containing image by utilizing a dark passage apriori algorithm; S3, judging the defogging degree, if the fog is not completely removed, changing parameters and executing the step S2 again; S4, if the fog is completely removed, determining a histogram B of the defogged image, marking the coordinates of a starting point of the right boundary of a peak value, and marking the coordinates of a termination point of the right boundary; S5, stretching the histogram; S6, performing histogram specification on the reconstructed histogram B' and the defogged image. The method is used for performing post-processing on the dark passage apriori algorithm through the histogram, the operation is simple and flexible, and different parameters can be set according to different specific images, so that the condition that a dark passage apriori processing result has difficulty in fine adjustment is avoided; the efficiency of the algorithm is high, and the obtained defogged image is relatively high in quality, and is similar to a real fog-free picture.

Description

technical field [0001] The invention relates to image processing technology, in particular to a method for defogging an image with a small amount of background fog. Background technique [0002] With the continuous development of computer software and hardware technology, it has become possible to dehaze the scene images of foggy weather images, which in turn puts forward new requirements for the clarity and realism of dehazed images. [0003] In foggy weather, due to the large number of particles such as water droplets in the atmosphere, as the distance between the object and the imaging device increases, the impact of the scattering of atmospheric particles on imaging gradually increases. The above effects are mainly caused by two scattering processes: first First, the reflected light on the surface of the object is attenuated due to the scattering of atmospheric particles when it reaches the imaging device; second, natural light enters the imaging device to participate in...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 朱青松杨帅
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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