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Analysis of Cluttered Scenes Using an Elastic Matching Approach for Stereo Images

christian.eckes{at}imk.fraunhofer.de Fraunhofer Institute for Media Communications IMK, D-53754 Sankt Augustin, Germany

Jochen Triesch

triesch{at}ucsd.edu Department of Cognitive Science, University of California, San Diego, La Jolla, CA 92093-0515, U.S.A.

Christoph von der Malsburg

malsburg{at}neuroinformatik.ruhr-uni-bochum.de Institut für Neuroinformatik, Ruhr-Universität Bochum, D-44780 Bochum, Germany

We present a system for the automatic interpretation of cluttered scenes containing multiple partly occluded objects in front of unknown, complex backgrounds. The system is based on an extended elastic graph matching algorithm that allows the explicit modeling of partial occlusions. Our approach extends an earlier system in two ways. First, we use elastic graph matching in stereo image pairs to increase matching robustness and disambiguate occlusion relations. Second, we use richer feature descriptions in the object models by integrating shape and texture with color features. We demonstrate that the combination of both extensions substantially increases recognition performance. The system learns about new objects in a simple one-shot learning approach. Despite the lack of statistical information in the object models and the lack of an explicit background model, our system performs surprisingly well for this very difficult task. Our results underscore the advantages of view-based feature constellation representations for difficult object recognition problems.