USING THE COORDINATE SYSTEM DURING IDENTIFICATION OF THE SIGNS IN HANDWRITING EXPERTISE

Abstract

The purpose of the article is to improve the system of handwriting markings in the context of the introduction of new ways that can reliably determine identification features by placing "special" signature points qualitatively using descriptive and quantitative methods. In the course of the research, a method of determining the position of the points of signatures in a coordinate system, similar to a rectangular one, is developed, where the horizontal axis is considered to be the signature line, and the vertical is the perpendicular to the signature line. The use of the coordinate grid makes it possible to visually, more accurately and precisely estimate both the length of the movements during the application of the graphic elements of the signatures and the features of the ratio of the length of the movements. It is proposed to determine the part of the signature identifying features by quantitative methods in a rectangular coordinate system
for establishing the distances between individual points in their coordinates and the numerical values of the distances between the points. Implementation of the aforementioned method of signature research into the expert practice will reduce the influence of subjective factor, ensure the authenticity of identifying features during the examination of signatures by qualitative and descriptive methods and prevent from providing insufficiently substantiated conclusions. This method may be the basis for the development of an automated “AIS-PIDPYS” identification system. The validity of the obtained results and conclusions is ensured by the use of empirical research methods, including observation, measurement, modeling, prediction, formalization, which allows to visually evaluate the individual features of signatures, as well as quantitative methods (statistical, mathematical, generalization) to establish numerical dependencies in the examination of these signs.
Keywords: signature; identification features; coordinate system; signature line; coordinate grid.