Quantitative characterization of morphological polymorphism of handwritten characters loops

Forensic Science International : Synergy
R MarquisM Schmittbuhl

Abstract

A methodology based on Fourier descriptors that was previously validated has been applied to 13 writers in order to quantify the polymorphism degree of the shape of the loops of the handwritten characters a, d, o and q. In a first step, the discriminating power of the parameters extracted from these letters was investigated. The loop of the letter d appeared to be the most discriminant with a correct classification rate of 82.4%, whereas the least discriminant one was the loop of the letter o (69.7%). The second aim of the study was to extract grouping characteristics which make it possible to discriminate between writer sets, whatever the letter. Trends in the writing of loops could effectively be shown: the 13 writers of the study were separated into five main groups according to the shape and surface of their loops. The most discriminating features between the writer groups were the importance of the loops elongation and the surface of the loops. Finally, the differences between writers belonging to distinct groups could be characterized more precisely, and differences between writers belonging to the same group were revealed; the individual writings were distinguished by the variability of the parameters of shape and surfac...Continue Reading

References

Jun 27, 2008·IEEE Transactions on Pattern Analysis and Machine Intelligence·Lambert Schomaker, Marius Bulacu

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Citations

Aug 15, 2014·Forensic Science International : Synergy·F TaroniS Bozza
Apr 3, 2012·Comptes rendus biologies·Jérémy E GodefroyAndré Constantinesco
Jan 9, 2007·Forensic Science International : Synergy·R MarquisM Schmittbuhl
Jul 26, 2015·Forensic Science International : Synergy·Xiaohong Chen

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