Robust Near-Isometric Matching via Structured Learning of Graphical Models

Details Robust Near-Isometric Matching via Structured Learning of Graphical Models Robust Near-Isometric Matching via Structured Learning of Graphical Models

2008-09-21

arxiv.org/abs/0809.3618v1

Computer Science

Computer Vision and Pattern Recognition

11 pages, 9 figures

Scientific paper

Models for near-rigid shape matching are typically based on distance-related features, in order to infer matches that are consistent with the isometric assumption. However, real shapes from image datasets, even when expected to be related by "almost isometric" transformations, are actually subject not only to noise but also, to some limited degree, to variations in appearance and scale. In this paper, we introduce a graphical model that parameterises appearance, distance, and angle features and we learn all of the involved parameters via structured prediction. The outcome is a model for near-rigid shape matching which is robust in the sense that it is able to capture the possibly limited but still important scale and appearance variations. Our experimental results reveal substantial improvements upon recent successful models, while maintaining similar running times.

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