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10 January 2003 MPEG-7 based shape retrieval with robustness against partial occlusion
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Object shape features are powerful when used in similarity search-&-retrieval and object recognition because object shape is usually strongly linked to object functionality and identity. Many applications, including those concerned with visual objects retrieval or indexing, are likely to use shape features. Those systems have to cope with scaling, rotation, deformation and partial occlusion of the objects to be described. The ISO standard MPEG-7 contains different shape descriptors, where we focus especially on the region-shape descriptor. Since we found, that the region-shape descriptor is not very robust against partial occlusion, we propose a slightly changed feature extraction method, which is based on central-moments. Further, we compare our method with the original region-shape implementation and show that, applying the proposed changes, the robustness of the region-shape descriptor against partial occlusions can be significantly increased.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael Hoeynck and Jens-Rainer Ohm "MPEG-7 based shape retrieval with robustness against partial occlusion", Proc. SPIE 5021, Storage and Retrieval for Media Databases 2003, (10 January 2003); doi: 10.1117/12.476249;

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