US4944022A
Expired / Lapsed
US
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Method of creating dictionary for character recognition
Assignee: Ricoh Co Ltd
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Filing: 1987-12-17
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Granted: 1990-07-24
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Expires: 2007-12-17
Abstract
Abstract A method of creating a dictionary for character recognition uses a document on which identical characters are aligned in a scanning direction and a mark indicating a size of a character line including the characters is positioned in the vicinity of the aligned characters. An image processing is carried out for dot patterns of the aligned characters, and one dot pattern to be registered in a dictionary is produced. Then, the produced dot pattern is registered in a dictionary together with a corresponding character code data.
Inventors
- 👤 Kenji Yasujima
- 👤 Masao Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:13
CPC Classifications
G; G06; G06F; G06F18/00; G06F18/20; G06F18/28
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
147 words
A method of creating a dictionary for character recognition, comprising the steps of: optically scanning a sheet having a character line having a plurality of identical characters aligned in a scanning direction, a mark defining a size of said character line being provided in the vicinity of said character line; generating image data of each of said identical characters within said character line having the size defined by said mark, said image data of each of said identical characters forming an individual dot pattern; carrying out a predetermined image processing for said individual dot patterns of said identical characters to thereby generate a single dot pattern serving as a reference dot pattern of said identical characters; inputting a character code corresponding to said single dot pattern; and registering said single dot pattern and said character code in a storage region of a dictionary file for character recognition.
Claim 2
Independent Claim
147 words
A method of creating a dictionary for character recognition, comprising the steps of: optically scanning a sheet having a character line having a plurality of identical characters aligned in a scanning direction, a mark defining a size of said character line being provided in the vicinity of said character line; generating image data of each of said identical characters within said character line having the size defined by said mark, said image data of each of said identical characters forming an individual dot pattern; carrying out a predetermined image processing for said individual dot patterns of said identical characters to thereby generate a single dot pattern serving as a reference dot pattern of said identical characters; inputting a character code corresponding to said single dot pattern; and registering said single dot pattern and said character code in a storage region of a dictionary file for character recognition.
Claim 3
Dependent Claim
52 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said mark is a bar extending in a direction perpendicular to said scanning direction and a height of said mark is greater than that of said identical characters measured in said direction perpendicular to said scanning direction.
Claim 4
Dependent Claim
27 words
A method of creating a dictionary for character recognition as claimed in claim 2, wherein a width of said mark includes a plurality of consecutive black dots.
Claim 5
Dependent Claim
74 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said predetermined image processing includes a step of carrying out an OR logic operation on said image data of said identical characters located at an identical dot position in said individual dot patterns, and wherein the result of said OR logic operation forms data at said identical dot position of said single dot pattern registered in said dictionary file.
Claim 6
Dependent Claim
105 words
A method of creating a dictionary for character recognition as claimed in claim 4, wherein said predetermined image processing includes steps of counting the number of data having a black level among said image data located at said identical dot position of said individual dot patterns, carrying out an OR logic operation on said image data located at said identical dot position in said individual dot patterns, determining whether said counted number of data is smaller than a predetermined number of data, and deciding the level of data at said idenical dot position to be white irrespective of the result of said OR logic operation.
Claim 7
Dependent Claim
74 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said predetermined image processing includes a step of carrying out an AND logic operation on said image data of said identical characters located at an identical dot position in said individual dot patterns, and wherein the result of said AND logic operation forms data at said identical dot position of said single dot pattern registered in said dictionary file.
Claim 8
Dependent Claim
33 words
A method of creating a dictionary for character recognition as claimed in claim 1, further comprising a step of displaying said single dot pattern registered in said dictionary file on a display device.
Claim 9
Dependent Claim
27 words
A method of creating a dictionary for character recognition as claimed in claim 1, further comprising a step of displaying any one of said individual dot patterns.
Claim 10
Dependent Claim
21 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said identical characters are typed characters.
Claim 11
Dependent Claim
21 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said identical characters are handwritten characters.
Claim 12
Dependent Claim
37 words
A method of creating a dictionary for character recognition as claimed in claim 4, wherein said OR logic operation corresponding to said image processing is carried out when said identical characters are typed characters or handwritten characters.
Claim 13
Dependent Claim
35 words
A method of creating a dictionary for character recognition as claimed in claim 6, wherein said AND logic operation corresponding to said predetermined image processing is carried out when said identical characters are handwritten characters.
Claim 14
Dependent Claim
34 words
A method of creating a dictionary for character recognition as claimed in claim 5, wherein said OR logic operation corresponding to said image processing is carried out when said identical characters are handwritten characters.
Claim 15
Dependent Claim
30 words
A method of creating a dictionary for character recognition as claimed in claim 1, further comprising a step of smoothing said individual dot patterns before carrying said predetermined image processing.
Claim 16
Dependent Claim
31 words
A method of creating a dictionary for character recognition as claimed in claim 1, further comprising a step of normalizing said individual dot patterns before carrying out said predetermined image processing.
Claim 17
Dependent Claim
27 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said step of inputting said character code is performed by a keyboard.
Claim 18
Dependent Claim
24 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein the number of said identical characters is about ten.
Claim 19
Dependent Claim
24 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said dictionary file is created for each character font.
Claim 20
Dependent Claim
40 words
A method of creating a dictionary for character recognition as claimed in claim 1, wherein said mark is positioned in the vicinity of one of said identical characters which is located at the beginning or end of said character line.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |