Image defogging method and device, storage medium and electronic equipment

Abstract

The invention relates to the technical field of image processing, especially to an image defogging method and device, a storage medium and electronic equipment. The method can comprise that a sky areais segmented from an image to be defogged according to brightness, saturation and gradient information of the image; a first global airglow component is calculated according to all the pixels in thesky area, and the transmissivity of all the pixels in the sky area are set as the first transmissivity; second transmissivity of pixels in a non-sky area in the image to be defogged is calculated according to the first global airglow component; and a defogged image of the image to be defogged is calculated according to the first global airglow component, the first transmissivity, the second transmissivty of the pixels in the non-sky area and an atmospheric scattering model. According to the invention, the sky area is segmented more accurately, the sky area is prevented from a color distortionphenomenon, more detail information of the non-sky area is reserved, and the defogged image is clearer and more natural.

Description

technical field [0001] The present disclosure relates to the technical field of image processing, and in particular to an image defogging method and device, a storage medium, and electronic equipment. Background technique [0002] In smoggy weather, there are a large number of suspended particles floating in the atmosphere, and these suspended particles have the effect of absorbing and scattering light. Therefore, in the foggy environment, especially in the case of heavy fog, the image captured by the visible light imaging system will have low contrast, color distortion, blurring and other degradation phenomena. This not only affects people's visual effects, but also brings serious security risks to various outdoor video surveillance, such as traffic surveillance. Therefore, how to obtain a clear defogged image has great application value. [0003] At present, image defogging methods can be roughly divided into two categories: one is based on traditional image enhancement ...

AI Technical Summary

Problems solved by technology

However, when there is a sky region in the image, since the sky region does not meet the prior conditions, the sky region in the defogged image obtained by this method will appear color distortion

In addition, the current image defogging method also includes using gradient information to segment the sky area, but when the concentration of fog is high, this method may misclassify the area similar to the sky area into the sky area, for example, in the concentration of fog When it is large, a large area of ​​field may be wrongly divided into sky regions. Therefore, only using gradient information to segment the sky region cannot achieve the desired effect

In addition, most of the current defogging methods are good for light fog images, but poor for dense fog images, and will produce obvious halo effects in places where the depth of the scene changes rapidly.

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