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US5040222A
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Pattern generation method for registering handwriting
Assignee: Cyber SIGN Japan Inc
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Filing: 1989-12-14
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Granted: 1991-08-13
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Expires: 2009-12-14
Abstract
Abstract A pattern generation method for registering handwriting and a method for updating same that facilitates the obtaining of a registration pattern that reflects accurately the characteristics of an individual handwritten signature. Dynamic programming matching is used to obtain a cumulative error among a plurality of input patterns in the form of a distortion function, and this distortion function is used for shape averaging and time distortion averaging of input patterns.
Inventors
- 👤 Masami Muroya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:42
CPC Classifications
G; G06; G06V; G06V40/00; G06V40/30; G07; G07C; G07C9/00; G07C9/30; G07C9/32; G07C9/35
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
156 words
A pattern generation method in which a time axis is employed for registering a handwritten character with a stroke action, comprising the steps of: multiple inputting of handwritten characters in the form of coordinate and writing pressure three dimensional time series information; normalizing the position and size of multiple handwritten character patterns thus input; calculating a distortion function for selecting a desired pattern from the multiple input patterns as a reference pattern and obtaining a time distortion function between the reference pattern and other input patterns using dynamic programming matching; using the distortion function for time axis correction of the time axis of each input pattern; shape averaging the time axis corrected multiple input patterns; distortion averaging the multiple distortion functions; and time distortion correction of the time axis of the shape averaged patterns, using the distortion function average; whereby the registration pattern is obtained from the distortion function derived shape average and time distortion average.
Claim 2
Dependent Claim
156 words
A pattern generation method in which a time axis is employed for registering a handwritten character with a stroke action, comprising the steps of: multiple inputting of handwritten characters in the form of coordinate and writing pressure three dimensional time series information; normalizing the position and size of multiple handwritten character patterns thus input; calculating a distortion function for selecting a desired pattern from the multiple input patterns as a reference pattern and obtaining a time distortion function between the reference pattern and other input patterns using dynamic programming matching; using the distortion function for time axis correction of the time axis of each input pattern; shape averaging the time axis corrected multiple input patterns; distortion averaging the multiple distortion functions; and time distortion correction of the time axis of the shape averaged patterns, using the distortion function average; whereby the registration pattern is obtained from the distortion function derived shape average and time distortion average.
Claim 3
Dependent Claim
72 words
A pattern generation method according to claim 1, wherein the registration pattern is updated in accordance with changes in input patterns corresponding to time-based changes in a handwritten character input pattern, comprising: forming a multiplicity of handwritten character input patterns from an existing registration pattern and new input patterns; and giving a prescribed weighting to the existing registration pattern and the input patterns and performing each of the steps of the method.
References Cited (Backward Citations)
US4718102A
Cited
US4646351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |