Method for signal encoding and feature extraction

Details Method for signal encoding and feature extraction Method for signal encoding and feature extraction

1998-01-30

2000-11-21

Mehta, Bhavesh

Image analysis

Image compression or coding

Quantization

348422, 704222, G06K 938, G06K 936, G06K 946

Patent

active

061514144

ABSTRACT:
A new encoder is provided which operates on a database of n-dimensional signal vectors where such signal vectors are restricted to being non-negative. In the establishment of a codebook for this encoder, p signal vectors (of dimension n) are placed in an n.times.p matrix X, and an approximate factorization: X.apprxeq.WV is constructed, where W and V are matrices whose entries are non-negative. Each column of the n.times.r matrix W is characterized as a "feature", such features having been "learned" from the database of n-dimensional signal vectors.

REFERENCES:
patent: 4963034 (1990-10-01), Cuperman et al.
patent: 5487128 (1996-01-01), Ozawa
patent: 5727122 (1998-03-01), Hosoda et al.

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