Video image defogging method based on self-adapting allowance

The invention relates to a video image defogging method based on self-adapting allowance and belongs to the field of video image processing. The method includes: building a single-frame image foggy day degradation model, estimating a rough transmission picture by aid of dark channel prior, obtaining a refined transmission by aid of a guide filter, judging whether images contain a large bright area, obtaining the rectified transmission picture and restoring a fog-free image. The method is applicable to video images with basically unchanged scenes like vide monitoring and video images with dynamically changing scenes, and can be widely applied to outdoor monitoring, remote sensing, intelligent transportation and other aspects.