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Learning non-negative sparse image codes by convex programming

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2 Author(s)
Heiler , M. ; Dept. Math. & Comput. Sci., Mannheim Univ. ; Schnorr, C.

Example-based learning of codes that statistically encode general image classes is of vital importance for computational vision. Recently non negative matrix factorization (NMF) was suggested to provide image code that was both sparse and localized, in contrast to established non local methods like PCA. In this paper, we adopt and generalize this approach to develop a novel learning framework that allows to efficiently compute sparsity-controlled invariant image codes by a well defined sequence of convex conic programs. Applying the corresponding parameter-free algorithm to various image classes results in semantically relevant and transformation-invariant image representations that are remarkably robust against noise and quantization

Published in:

Computer Vision, 2005. ICCV 2005. Tenth IEEE International Conference on  (Volume:2 )

Date of Conference:

17-21 Oct. 2005

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