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S-E-D-A / SEDA-CV-TextDetection

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Border Energy classifier for region filtering #9

Open CattleProdigy opened 10 years ago

CattleProdigy commented 10 years ago

Border energy attempts to find a measure of a region with high feature-to-background contrast in an attempt to discard homogeneous, less-salient regions. Regions with border energy below some threshold are discarded.

Border energy is defined as the average Sobel Edge Magnitude of all border pixels in a region.

The paper proposes a "simple adaptive threshold" not based on std-dev or variance.

See: http://en.wikipedia.org/wiki/Sobel_operator#Formulation for Sobel Edge detection and magnitude.

CattleProdigy commented 10 years ago

The calculation for Border Energy is done. The paper mentions a 'simple adaptive threshold' as the actual decision for this region classifier. The paper is vague. Right now the decision is a dumb threshold set to an empirically chosen number