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A new descriptor for symbol recognition is proposed. 1) A histogram is constructed for every pixel to figure out the distribution of the constraints among the other pixels. 2) All the histograms are statistically integrated to form a feature vector with fixed dimension. The robustness and invariance were experimentally confirmed.
Symbol recognition, graphics recognition, descriptor, feature extraction, feature representation.

S. Yang, "Symbol Recognition via Statistical Integration of Pixel-Level Constraint Histograms: A New Descriptor," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 27, no. , pp. 278-281, 2005.
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