A New Vectorial Signature for Quick Symbol Indexing, Filtering and Recognition

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.