Structural analysis of on-line curves based on topological turning patterns

摘要

Compared with machine-printed characters, handwritings have variety of shape deformations. One of the important goals of character recognition is to find some qualitative features that are invariant under deformation of shapes. In this paper, we propose a method for structural analysis of on-line handwritten curves based on topological turning patterns. The topological turning pattern is described by initial direction, directional change, and inflection number of the curve, computed from directional features of the segments that constitute the curve. The mathematical properties of the topological turning pattern is explained along with the experimental results of the method on numerals.