4105998 A abstract a pattern recognition processing system in which variations in a character pattern or the like especially in a handwritten one are suppressed to extract its invariable characteristics ensuring accurate recognition of the character pattern or the like the pattern to be recognized is divided into circumscribed quadrangular areas and scanned in horizontal and vertical directions to extract reflection segments between the vertical frames of the circumscribed quadrangular areas and particular segments between adjacent ones of pattern strokes further endpoints of these reflection and particular segments are checked in directions across the scanning directions to extract those endpoints which are not blocked by the pattern strokes and the corresponding positions of the co ordinates of these endpoints on a figure frame in the directions across the scanning directions are encoded to extract characteristics of contours of the pattern to be recognized application_number US 78011177 A description fig1 a to 1m are explanatory of coding based on particular segments in accordance with this invention in fig1 a to 1m reference numeral 1 indicates figure frames 2 designates patterns to be recognized 3 identifies scanning lines 4 5 and 6 denote particular segments 7c to 7m represent approximation of characters profile by using non blocked particular segments according to this invention and 8c to 8m show 8 bit codes respectively corresponding to the profile figures the particular segments 4 to 6 in the present invention may be considered to be obtained in the following manner the particular segments 4 and 5 are vertical scanning particular segments which are obtained by such vertical scanning as shown in fig1 a of the particular segments obtained as shown in fig1 a and 1b the segment 5.