Image analysis – Pattern recognition – Feature extraction
Patent
1996-07-05
1998-05-05
Shalwala, Bipin
Image analysis
Pattern recognition
Feature extraction
348 19, 358538, 358539, 382164, 382165, 382166, 382118, 382239, G06K 946, G06K 966, G06K 900, G06K 934
Patent
active
057487766
ABSTRACT:
The present invention is intended to exactly extract a feature-region along its contour line without erroneously extracting any moving object other than the feature-region. An extraction signal from a feature-region main-portion extracting circuit is sent to a small region eliminating circuit whereby an erroneously extracted small region is detected and eliminated as an erroneously extracted noisy portion. The small region eliminating circuit compares a small region with four predetermined detection patterns, discriminates it as a region other than the feature (face)-region if no match is found and causes a center pixel of a window of 3.times.3 pixels to have a logical value of zero. An output of the small region eliminating circuit is sent to a blank filling circuit which compares its input with four predetermined detection patterns, discriminates it as a face-region if a match is found and makes a central pixel of a window of 13.times.13 pixels have a logical value of 1. The above-mentioned extraction method can reliably extract features of the face-region and is free from the erroneous extraction of any moving object other than the face.
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Conlin, Esq. David G.
Shalwala Bipin
Sharp Kabushiki Kaisha
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