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Progress on a system to monitor the development of glaucoma by measuring the topography of the optic disk is reported. The need for an accurate method for doing this using passive vision is explained. Sparse depth measurements from stereo matching of blood vessels provide insufficient constraint for reconstructing the surface of the optic disk. Shape from shading has to contend with a spatially-varying albedo. We show how a particular arrangement of fundus cameras allows us to apply a technique akin to homomorphic filtering to recover estimates of δz δx that can be smoothed by appropriate regularization. Stereo is integrated with these photometric stereo depth estimates. Examples of artificial object and optic disk surface reconstructions are presented. © 1991.

Original publication

DOI

10.1016/0262-8856(91)90047-S

Type

Journal article

Journal

Image and Vision Computing

Publication Date

01/01/1991

Volume

9

Pages

39 - 44