The Detection of Buddha’s Circle Head Light and Backlight in Thangka Image

According to the feature of Buddha’s head light and backlight area is circle in Thangka image, so a method is proposed for detection of circle head light and backlight. Firstly, a method of morphology in edge extraction to get image edge is used, and by removing the edge connection point to get edge segment image. Secondly, through least square circle detection and verification condition of target circle to get the precise position of circle head light and backlight in Thangka image. The experimental results show that the method is with high accuracy and accurate positioning features in the detection of Buddha’s circle head light and backlight in Thangka Image.