LINEAR MANIFOLD APPROXIMATION BASED ON DIFFERENCES OF TANGENTS
Image Feature Extraction and Analysis
Přednášející: Sofia Karygianni, Autoři: Sofia Karygianni, Pascal Frossard, Ecole Polytechnique Fédérale de Lausanne, Switzerland
In this paper, we consider the problem of manifold approximation with affine subspaces. Our objective is to discover a set of low dimensional affine subspaces that represents manifold data accurately while preserving the manifold's structure. For this purpose, we employ a greedy technique that partitions manifold samples into groups that can be well approximated by low dimensional subspaces. We start with considering each manifold sample as a different group and we use the difference of tangents to determine advantageous group mergings. We repeat this procedure until we reach the desired number of significant groups. At the end, the best low dimensional affine subspaces corresponding to the final groups constitute the manifold representation. Our experiments verify the effectiveness of the proposed scheme and show its superior performance compared to state-of-the-art methods for manifold approximation.
Informace o přednášce
Nahráno: | 2011-05-27 15:05 - 15:25, Club A |
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Přidáno: | 15. 6. 2011 02:52 |
Počet zhlédnutí: | 43 |
Rozlišení videa: | 1024x576 px, 512x288 px |
Délka videa: | 0:13:49 |
Audio stopa: | MP3 [4.64 MB], 0:13:49 |
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