Segmentation refinement using active shape constraints for peripapillary atrophy detection

Mengxuan Li, Ruixiao Yang, Hanxiang Li, Weihang Zhang, Jie Xu, Huiqi Li

Abstract: Highlights•A novel ASM-post-processing method is proposed to refine PPA segmentation.•An automatic landmark sampling method is proposed to obtain shape descriptors.•The angle-finding method is proposed to handle the segmentation discontinuities.•A dictionary selection algorithm is proposed to select the representative shapes.