The New Method of Identification of Handwriting Using Volumes of Indentations

Indicators of handwriting examination in recent forensic science are mainly figures on two dimensional planes. However forgeries of handwriting which are over-written on genuine one while being watched through paper aren't able to distinguish from the genuine one. This article tried to use other indicators with regard to pen-tip forces. Pen-tip forces were measured using a digitizer tablet during drawing four directions short lines. Simultaneously volumes of indentations which were pressed by the pen-tip forces were measured using our proposed method of applying shape from shading. The pen-tip forces and the volumes of the indentations were compared with correlation. The results showed both the indicators had high correlations. In addition the patterns of the volumes of the each direction were different between ten subjects. This provides forensic document examiners with a powerful tool which is applied to identifying writers using volumes of indentations of handwriting which composed of four directions short lines.