Handwriting recognition system using substroke analysis
US6339655B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1996 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Oct 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/757
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A handwritten pattern and stroke recognition system recognizes an input pattern by comparing it to reference patterns. The input and reference patterns comprise at least one stroke, where a stroke is defined as the series of sample points from pen-down to pen-up. The system of the present invention compares the input and reference patterns stroke by stroke and thus, compares input strokes to reference strokes. The system includes a tangent and stable point extractor, a reference database and a stable-point-based classifier. The extracter determines tangents to at least some of the sample points of the input stroke and determines, which of the sample points between a beginning and end of the input stroke are stable points. The reference database stores tangents of sample points of the reference strokes and stable points of the reference strokes. The stable-point-based classifier divides each input stroke and each reference stroke into at least two substrokes wherein each substroke has at least one of the stable points at an end thereof. The classifier also generates stroke match values indicating the quality of the match between the input stroke and the reference strokes based on th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.