RECOGNITION SYSTEM FOR ON-LINE HANDWRITTEN CHARACTER

• Main Author: OOTA GICHU
• Format: Patent
• Language: English
• Published: 02.05.1986
• Subjects: CALCULATING; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS

PURPOSE:To simplify a character recognition system by approximating each stroke at many points for characters like HIRAGANA (Japanese syllabary) including curve components and securing the resemblance with a standard character approximated at a point where the strokes are thinned among those standard characters approximat ed at the same point. CONSTITUTION:The input character sent from a character information input part undergoes the conversion of coordinates so that the centroid point is coincident with an original point as well as the normalization so as to secure a fixed distance between the centroid point and each stroke point. Thus the number 201 of strokes is detected. Each stroke is approximated at a point 2N-1 including both start and end points at an approximate point extracting part 3. Then an inter-pattern distance calculating part 4 obtains the distance between approximate points for a thinned point N and a pattern stored in a standard pattern memory part 7. For the result of this calculation, a minimum distance detecting part 5 detects the minimum and the next minimum values. Then the part 4 obtains a ratio between both values and delivers a code corresponding to a category of the stroke showing the minimum value when said ratio is larger than a certain threshold value through a switch part 10. Then the correction is carried out based on a category code for discrimination from an approximate character via a resemblance table 8.