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US4491965A
Expired / Lapsed
US
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Character recognition apparatus
Assignee: Toshiba Corp
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Filing: 1982-12-14
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Granted: 1985-01-01
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Expires: 2002-12-14
Abstract
Abstract The invention provides a character recognition apparatus having an original feature extracting section for extracting as an original feature a feature deliberately neglected in the processes of pre-process conversion and recognition feature extraction. The original feature extracted by the original feature extracting section is used for final recognition of a set of characters, thus preventing erroneous character recognition.
Inventors
- 👤 Tooru Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:10
CPC Classifications
G; G06; G06V; G06V30/00; G06V30/10; G06V30/24; G06V30/248; G06V30/2504
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
248 words
A character recognition apparatus comprising: segmenting means for segmenting a set of input characters into single characters; pre-process converting means connected to said segmenting means, for providing a predetermined conversion for each of the single characters so as to allow easy subsequent recognition operations; original feature extracting means connected to said segmenting means, for extracting as an original feature at least one feature among features of each of the single characters which is deliberately neglected by said pre-process converting means; recognizing means connected to said pre-process converting means, for prestoring a reference recognition feature and an answer corresponding thereto, for extracting a recognition feature from each of the single characters which is converted by said pre-process converting means, for comparing the recognition feature with the reference recognition feature, and for determining an answer for each of the single characters; memory means connected to said recognizing means and said original feature extracting means for storing for each of the single characters the answer determined by said recognizing means and the corresponding original feature extracted by said original feature extracting means; and compiling means connected to said memory means for reading out the original features corresponding to characters which have the same value among the answers stored in said memory means after the storing of answers and corresponding original features for each of said characters and for rejecting the characters corresponding to the original features which exceed a predetermined allowable value to determine final answers for the set of characters.
Claim 2
Dependent Claim
248 words
A character recognition apparatus comprising: segmenting means for segmenting a set of input characters into single characters; pre-process converting means connected to said segmenting means, for providing a predetermined conversion for each of the single characters so as to allow easy subsequent recognition operations; original feature extracting means connected to said segmenting means, for extracting as an original feature at least one feature among features of each of the single characters which is deliberately neglected by said pre-process converting means; recognizing means connected to said pre-process converting means, for prestoring a reference recognition feature and an answer corresponding thereto, for extracting a recognition feature from each of the single characters which is converted by said pre-process converting means, for comparing the recognition feature with the reference recognition feature, and for determining an answer for each of the single characters; memory means connected to said recognizing means and said original feature extracting means for storing for each of the single characters the answer determined by said recognizing means and the corresponding original feature extracted by said original feature extracting means; and compiling means connected to said memory means for reading out the original features corresponding to characters which have the same value among the answers stored in said memory means after the storing of answers and corresponding original features for each of said characters and for rejecting the characters corresponding to the original features which exceed a predetermined allowable value to determine final answers for the set of characters.
Claim 3
Dependent Claim
63 words
An apparatus according to claim 1, wherein said compiling means compares a predetermined reference feature with each of the original features of the characters corresponding to the identical answers obtained by said recognizing means to detect a difference therebetween and rejects the characters corresponding to a difference which exceeds the predetermined allowable value, thereby determining the final answers for the set of characters.
Claim 4
Dependent Claim
28 words
An apparatus according to claim 1, wherein said predetermined conversion performed by said pre-process converting means is a conversion of normalizing a size of each of the characters.
Claim 5
Dependent Claim
27 words
An apparatus according to claim 2, wherein said predetermined reference feature used in said compiling means is one of the original features corresponding to the identical answers.
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) | 1988-01-01 | 1988-07-02 | 1989-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-01 | 1992-07-02 | 1993-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-01 | 1996-07-02 | 1997-01-01 | $7700.00 | Window Closed / Lapsed |