Method for eliminating cloud and haze of atmospheric degraded image

Abstract

The invention discloses a method for eliminating cloud and haze of an atmospheric degraded image. The method comprises the steps of the acquisition of a dark channel image and mid-value filtering, the self-adaptive degradation and acquisition of an atmospheric light image, the detailing of an atmospheric transmission function and the visual correction of a color domain. The atmospheric degraded image to be processed by the method has the problems of different illumination intensities, contrast ratios and dynamic ranges, a dark channel theory model is adopted, and the mid-value filtering of the dark channel image, the self-adaptive degradation and acquisition of the atmospheric light image and the visual correction of the color domain are also combined to eliminate the cloud and haze, and the disadvantages in the prior art are overcome. Besides, the method for eliminating the cloud and haze of the atmospheric degraded image is simple to operate and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of computer and image processing, and in particular relates to a method for removing clouds and fog in images of atmospheric degradation. Background technique [0002] Atmospheric degradation image cloud removal technology under visible light imaging is the basis for improving image quality in the middle and advanced stages of computer image processing. It plays an important role in road safety monitoring under complex weather conditions, safe driving of automobiles, improvement of combat effectiveness of optical weapons, and effective surveillance of the enemy's battlefield [1] However, the existing visible light imaging systems based on physical models are seriously affected by atmospheric conditions. Under atmospheric degradation phenomena such as clouds and fog, the attenuation and scattering of a large number of tiny water droplets and aerosols suspended in the atmosphere seriously reduce the visibility...

AI Technical Summary

Problems solved by technology

[0023] The purpose of the embodiments of the present invention is to provide a method for removing clouds and fog in images of atmospheric degradation, aiming at solving the problems existing in existing technical solutions when the target is similar in nature to the atmospheric light in a large area or the clouds and fog are relatively deep. Satisfying this assumption will make the dark channel image obtained have rough edges and unclear layers; the size of the sub-fast affects the quality of cloud removal; atmospheric illumination cannot reflect the real scene, and does not have local characteristics; resulting in serious local distortion of the estimated atmospheric transfer function; The restoration result has color distortion, which affects the visual effect of the image; the overall restoration result is dark and the color is not bright enough

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