Method and device for recognizing manually traced characters on an input zone

Abstract

The invention concerns a method and an electronic device for recognizing characters traced manually on an input zone () comprising a plurality of sensors () each capable of being activated by a finger or a tracing instrument (). The method consists in comparing the manual trace of a character () produced on the input zone with a group of characters of a predetermined set of characters. The invention is characterised in that each character of the set of characters is represented by at least one predetermined model representative of a way in which the character can be traced, and in that a model representative of the way in which the manual trace of the character () has been performed on the input zone is elaborated. The models comprise at least topological parameters representative of the topology of the character, namely, in particular: the number of strokes (A, B, C, D) used for tracing the character; the one- or two-dimensional nature of each of said strokes (A, B, C, D); and the composition of each stroke of two-dimensional nature, namely the number of segments (A, A, B, B) composing the stroke and the rectilinear or curved nature of each segment. The models further comprise, where appropriate, geometrical parameters (φ, φ, φ, α) representative of the evolution of the angular orientation of the trace of the segment and geometrical parameters (P, P, P) representative of the position of the stroke on the input zone.