关键词: CT影像, 切片, 轮廓提取, 角点匹配, 遮挡

Abstract: Aiming at heuristic contour extraction in CT images, an occlusion recognition algorithm for the current contour is proposed according to the previous contour. Firstly, it uses a curve-based curve parameterization method to recognize all occlusions in a contour. However, for some parts of the contour that are not occlusions, the method probably recognizes them as occlusions. Then, based on automatically recognizing and matching corners between the previous contour and the current contour using the Direct Curvature Scale Space(DCSS), an occlusion-shrinking method is designed. The method shortens or removes incorrect occlusion using matched corner pairs. Many experiments show that this method can efficiently and accurately recognize all occlusions in a contour.

Key words:  CT image, segment, contour extraction, corner matching, occlusion