Shadow detection method based on color saturation property of shadow area

Abstract

The invention provides a shadow detection method based on color saturation property of a shadow area. The method comprises the following steps: S1, converting an original image I from an RGB space toan HSV space according to whether a brightness mean value of the original image I is greater than a set threshold value or not if the brightness mean value of the original image I is not less than theset threshold value, acquiring a saturation component S of the image, and brightening the original image if the brightness mean value is less than the set threshold value; S2, performing nonlinear transformation on the image saturation component S according to the characteristic that the saturation of the shadow area is relatively high, carrying out median filtering processing on the obtained saturation component diagram to reduce the influence caused by noise; obtaining a processed template M; and S4, performing morphological operation on the shadow area obtained in the S3, perfecting a processing result through the morphological operation, and completing a detection process, thereby solving the problems that the shadow area detected in the existing image processing is incomplete, is easily limited by an image shooting scene and is relatively poor in detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of image processing methods, and in particular relates to a shadow detection method based on the color saturation property of a shadow area. Background technique [0002] With the development of the times, information processing is also constantly evolving, from text images to various media forms such as sound and video. Computer vision refers to the use of cameras and computers instead of human eyes to identify targets and perform image processing. The basis for obtaining this information is the accurate analysis and processing of digital images, that is, digital image processing technology. [0003] Due to the limitation of image forming conditions, the visual information we receive generally has degradation phenomenon, and the shadow of the image is caused by image degradation. The formation of shadows in images is caused by the sun’s rays being blocked by objects. In order to effectively eliminate the i...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a shadow detection method based on the color saturation property of the shadow area in order to solve the shadow detected by the existing image shadow detection method proposed in the background technology above. The area is incomplete and easily limited by the image shooting scene, which affects the accuracy of shadow detection

Images