Study of structural features of handwritten grapheme "th\´ for writer identification

In this paper we present a study of 25 structural micro features of handwriting extracted automatically from images of grapheme ´th´. The study was carried out on a total of 3823 samples collected from 165 different writers, between 15 and 27 samples per writer. The methods of feature extraction are presented along with the results. We present a direct analysis of the feature usefulness. A measure of usefulness specific to handwriting examination was designed and the usefulness of the features was estimated. It was shown that most of the extracted micro features of ´th´ do possess discriminative power. Ranking of features allows simple comparison of their discriminative power.