Finding folds: on the appearance and identification of occlusion
Huggins, P.S.; Chen, H.F.; Belhumeur, P.N.; Zucker, S.W.
Computer Vision and Pattern Recognition, 2001. CVPR 2001. Proceedings of the 2001 IEEE Computer Society Conference on
Volume 2, Issue , 2001 Page(s): II-718 - II-725 vol.2
Digital Object Identifier   10.1109/CVPR.2001.991035
Summary: A natural sequel to edge detection is the interpretation of edges. This interpretation can provide useful information to various computer vision processes, including recognition, reconstruction, and tracking. In this paper we consider the problem of identifying occlusion edges in a single image. We examine the appearance of occlusion edges under variable illumination, both analytically and empirically, and find that the pattern of shading in the neighborhood of occlusion edges is a stable feature. Finally, we derive a filter for detecting occlusion and present the results of its application.

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