JPH0337557U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1A is a block diagram showing the configuration of a character recognition device according to an embodiment, FIG. 1B is a block diagram showing a configuration of a dividing point determining section of the embodiment, and FIG. A block diagram showing the configuration, Figures 3A and B are diagrams showing character patterns with different stroke positions, and Figures 3C and D are diagrams showing the distribution of the number of black bits obtained by projecting the character pattern onto the X axis. , Figure 3E
and F are diagrams showing the distribution of the number of black bits obtained by projecting the character pattern onto the Y axis, and FIG. 4 is a diagram showing an example of a form in which printed characters and handwritten characters are mixed. 11... Optical signal, 13... Preprocessing section, 13a... Photoelectric conversion section, 13b... Pattern register, 13c... Character cutting section, 17... Feature extraction section, 17a... Character line width calculation section, 17b... Character frame detection section, 17c ...Sub pattern extraction section, 17d... Feature matrix extraction section, 31... Format memory section, 33... Division point determination section,
33a...First dividing point determining stage, 33b...Second dividing point determining stage, 33c...Switching section, 15a...Character projection creating section, 15b...Gravity center detecting section, 15c...Character frame dividing point determining section.

Claims (1)

[Claims for Utility Model Registration] (1) A preprocessing unit that photoelectrically converts and quantizes the light from the characters to be recognized to obtain a character pattern, and a division unit that determines division points for dividing the character pattern into a plurality of regions. a point determination unit, a feature extraction unit that extracts feature amounts for each region divided by the division points of the character pattern to create a feature matrix of the character to be recognized;
and a character recognition device comprising an identification unit that recognizes the recognized character by comparing the characteristics of the recognized character extracted by the feature extraction unit with a standard character mask prepared in advance, storing format information of the recognized character. What is claimed is: 1. A character recognition device comprising: a format memory section for determining division points, the division point determining section determining division points according to format information output from the format memory section. (2) The division point determination unit includes: (a) a first division point determination stage (a) for determining coordinates for dividing the character frame circumscribing the character pattern into N equal parts in the X-axis direction and M equal parts in the Y-axis direction;
(N and M are arbitrary positive integers). The barycentric coordinates of each of the black bit number distributions are detected for the range of the character frame to be detected, and then the character frame is divided by the barycenter coordinates detected so far, and the range of this range is calculated for each divided range. a barycenter detection unit that repeats the process of detecting barycenter coordinates of the black bit number distribution to detect each barycenter coordinate series; and a barycenter coordinate number and coordinate value in each barycenter coordinate series assigned in order of the magnitude of the coordinate value The respective divided coordinate numbers in the X-axis and Y-axis divided coordinate series assigned in order of size are almost equally matched, and one barycentric coordinate in the barycenter coordinate series is associated with one divided coordinate, and each divided coordinate is determined. (c) a second division point determination stage comprising a character frame division point determination unit for determining a series; and (c) a character frame division point determination stage that determines the first division point determination stage and the second division according to format information from the format memory unit. The character recognition device according to claim 1, further comprising a switching section that enables one of the point determination stages.