A method for low-quality image enhancement in severe weather conditions

Abstract

The invention discloses a method for enhancing low-quality images under severe weather conditions, which belongs to the field of image processing and solves the problem that the image obtained by homomorphic filtering will have serious color degradation; or the Retinex algorithm will produce "halo" when the illumination is uneven. Phenomenon, there will also be a problem of local overbrightness. The present invention will read in the image to be processed, and use the Retinex method to repair the image color in the RGB space to obtain the improved image F of the color; read in the image to be processed, and compress the brightness range of the image with the homomorphic filtering algorithm in the HSV space, And enhance the contrast, get the improved brightness image J v ;Unify the results of step 1 and step 2 in HSV space, extract the hue and saturation information of the image processed by Retinex, extract the brightness information of the image processed by homomorphic filtering, and fuse the extracted three information to obtain the final image . The invention is used for low-quality image enhancement.

Description

technical field [0001] The invention relates to a method for enhancing low-quality images under severe weather conditions, which is used for enhancing low-quality images and belongs to the field of image processing. Background technique [0002] In the field of image processing and computer vision, serious degradation of images collected by image collectors under severe weather conditions is a long-standing problem. With the rapid development of computer vision, in order to serve the follow-up analysis, interpretation, recognition and tracking work, people put forward higher and higher requirements for the quality of images. Severe weather is the leading cause of degradation in today's outdoor images. [0003] When shooting outdoor images, the image quality is greatly affected by the weather. Different particles scattered in the atmosphere under different weather conditions will have different effects on image formation. The raindrops scattered in the atmosphere in rainy ...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that when the prior art processes color images, the image obtained by homomorphic filtering will have serious color degradation; or the Retinex algorithm will produce "halo" phenomenon when the illumination is uneven, and local over At the same time, it cannot play the role of compressing the dynamic range and color fidelity of the image; and when the homomorphic filtering and the Retinex algorithm are processed sequentially, the problems of post-processing and homomorphic filtering or the Retinex algorithm also exist.

Images