Fuzzy intervals for designing structural signature: an application to graphic symbol recognition
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A symbol spotting approach in graphical documents by hashing serialized graphs
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On the use of geometric matching for both: isolated symbol recognition and symbol spotting
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In this paper, we propose a novel descriptor based on symbol signatures for symbol filtering and recognition. First of all, all symbols are assumed in vectorial forms. All the primitive-pair relationships in a symbol are recorded and employed to create the signature representing the sym- bol. Although the approach aims at discriminating the sym- bol rapidly, it still preserves high recognition accuracy. Ex- periments on the data sets in GREC2003 [6] show its invari- ance on rotation, scaling, and other affine transformations.