PURPOSE: To extract a stable feature even for the variation of the size of characters and to make a system high speed and high in the accuracy of recognition by using K-th power sum of the distance between an observed point and character lines, normalized by a character frame using a sub-pattern as a feature that indicates the distribution of character lines of each direction looked from each point of a character pattern.
CONSTITUTION: Horizontal scanning is started again from a point at which horizontal scanning is started, and relative size of X coordinate of a change point which is the content of a change point memory and X coordinate of an observed point is judged by a comparator 36. In the case where X coordinate of the observed point is larger than the content of the change point memory 33, K-th power (K is a constant) of the difference between X coordinate of the observed point and the content of the change point memory 33, normalized by a character frame ΔX taken out from a character frame detecting section 4, that is, the value of K-th power of the distance between the observed point and character lines normalized by ΔX, is added to a register (register A) 38 of left direction of 16 bits initialized beforehand at the time of extracting horizontal features at every point using an arithmetic circuit 37.
HIGUCHI KOICHI
YAMASHITA YOSHIYUKI
MIYAMOTO ICHIRO
| JPS6057474A | 1985-04-03 | |||
| JPS603076A | 1985-01-09 | |||
| JPS6019287A | 1985-01-31 |