Mutual information-based registration of temporal and stereo retinal images using constrained optimization

Authors:
Yang-Ming Zhu
Affiliations:
7237 Longview Drive, Solon, OH 44139, United States
Venue:
Computer Methods and Programs in Biomedicine
Year:
2007

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Abstract

In the registration of temporal and stereo retinal images, the rotation angle is normally less than 5^o and the scaling factor is between 0.95 and 1.05. Due to sitting constraints in the imaging process, the x translation can be more than 100pixels, but the y translation is usually small. This paper successfully incorporates these constraints in the mutual information-based registration and exploits a constrained optimization to seek an optimal registration. The proposed approach increases the success rate of the registration algorithm significantly. The impacts of the dynamic ranges of registration parameters on the registration outcome are studied and the effects of the order of rotation, scaling, and translation are also investigated.