Retinal image registration under the assumption of a spherical eye

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• 作者：Carlos Hernandez-Matas^a ; ^b ; ; Xenophon Zabulis^a ; Areti Triantafyllou^c ; Panagiota Anyfanti^c ; Antonis A. Argyros^a ; ^b
• 关键词：Retinal image registration ; Medical imaging ; Particle Swarm Optimization ; Pose estimation
• 刊名：Computerized Medical Imaging and Graphics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：55
• 期：Complete
• 页码：95-105
• 全文大小：2045 K
• 卷排序：55

文摘

We propose a method for registering a pair of retinal images. The proposed approach employs point correspondences and assumes that the human eye has a spherical shape. The image registration problem is formulated as a 3D pose estimation problem, solved by estimating the rigid transformation that relates the views from which the two images were acquired. Given this estimate, each image can be warped upon the other so that pixels with the same coordinates image the same retinal point. Extensive experimental evaluation shows improved accuracy over state of the art methods, as well as robustness to noise and spurious keypoint matches. Experiments also indicate the method's applicability to the comparative analysis of images from different examinations that may exhibit changes and its applicability to diagnostic support.