US3601802A
Expired / Lapsed
US
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Pattern matching character recognition system
Assignee: KDDI Corp
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Filing: 1967-09-06
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Granted: 1971-08-24
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Expires: 1987-09-06
Abstract
Abstract A pattern matching character recognition system in accordance with pattern matching method, where for each of input characters, a first kind of standard pattern included substantially in all the same named input characters and a second kind of standard pattern including substantially all the same named input characters are previously established for each of the input characters to be recognized, and the names of the respective input characters are determined in consideration of results obtained from respective compare operations between input characters and each of the two kinds of standard patterns.
Inventors
- 👤 Yukio Nakagome
- 👤 Saburo Shirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:16
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/70; G06V10/74; G06V10/75; G06V10/751
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
278 words
A pattern matching character recognition system, comprising: means for scanning input characters to be recognized; a first memory means for storing, for each of all input characters to be recognized, a first standard pattern included substantially in respective patterns of all the same named input characters; a second memory means for storing, for each of all the input characters to be recognized, a second standard pattern including respective patterns of all the same name input characters; a first measuring means for measuring an instant one of the input characters and each of the first standard patterns in a pattern matching condition therebetween to obtain, for each of the first standard patterns, a first measured value indicative of a coincidence area between said instant one of the input characters and each one of said first standard patterns; a second measuring means for measurIng an instant one of the input characters and each of the second standard patterns in a instant one matching condition therebetween to obtain, for each pair of the first and second standard patterns determined for the same input character, a second measured value indicative of a sum of the area of the first standard pattern of said each pair of the first and the second standard patterns and a noncoincidence area between said instant one of the input characters and the second standard pattern of said each pair of the first and second standard patterns; and a decision circuit means for determining successively names of the input characters in accordance with ratios of each of the first measured values to one of the second measured values corresponding to said each of the first m measured value.
Claim 2
Dependent Claim
278 words
A pattern matching character recognition system, comprising: means for scanning input characters to be recognized; a first memory means for storing, for each of all input characters to be recognized, a first standard pattern included substantially in respective patterns of all the same named input characters; a second memory means for storing, for each of all the input characters to be recognized, a second standard pattern including respective patterns of all the same name input characters; a first measuring means for measuring an instant one of the input characters and each of the first standard patterns in a pattern matching condition therebetween to obtain, for each of the first standard patterns, a first measured value indicative of a coincidence area between said instant one of the input characters and each one of said first standard patterns; a second measuring means for measurIng an instant one of the input characters and each of the second standard patterns in a instant one matching condition therebetween to obtain, for each pair of the first and second standard patterns determined for the same input character, a second measured value indicative of a sum of the area of the first standard pattern of said each pair of the first and the second standard patterns and a noncoincidence area between said instant one of the input characters and the second standard pattern of said each pair of the first and second standard patterns; and a decision circuit means for determining successively names of the input characters in accordance with ratios of each of the first measured values to one of the second measured values corresponding to said each of the first m measured value.
Claim 3
Dependent Claim
27 words
A pattern matching character recognition system according to claim 1, in which said first measuring means comprises means for determining a reference point for each input character.
Claim 4
Dependent Claim
38 words
A pattern matching character recognition system according to claim 1, in which said first standard patterns are light line representation of the corresponding standard characters and said second standard patterns are heavy line representations of said standard characters.
Claim 5
Dependent Claim
66 words
A pattern matching character recognition system according to claim 1, in which said first and second memory means include a bistable circuit producing at an output terminal an output ''''1'''' in case of matching an input character with a standard pattern of said first standard patterns and an output ''''0'''' in case of matching an input character with a standard pattern of said second standard patterns.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |