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US4454610A
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US
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Methods and apparatus for the automatic classification of patterns
Assignee: Transaction Sciences Corp
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Filing: 1982-01-06
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Granted: 1984-06-12
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Expires: 2002-01-06
Abstract
Abstract Methods and apparatus for the automatic classification of patterns are disclosed in which the intensity or gray level values of selected pixels of digital images of functions of position-invariant transforms of patterns to be classified, displayed as intensity functions, are correlated with one or more stored sets of values, each such stored set of values corresponding to one of the classes into which the unclassified patterns are to be classified. Methods of determining the coordinates of the selected pixels for use in automatic signature verfication and automatic handwritten numeral recognition are disclosed.
Inventors
- 👤 George C. Sziklai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:46
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/24; G07C9/247
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
185 words
Apparatus for the classification of patterns, comprising: unclassified representation generating means for generating a representation of at least part of a function of a position-invariant transform of each unclassified pattern presented thereto; transform function representation element value signal set producing means for producing from each of said unclassified representations a set of element value signals each of which represents the value of a property of one of a predetermined constellation of elements thereof; and correlating means for correlating each set of said transform function representation element value signals with at least one set of reference signals; said elements of said unclassified representations being selected in accordance with a statistical property of a plurality of reference representations each of which represents at least part of said function of said position-invariant transform of a reference pattern, and each one of said plurality of reference patterns being a member of a subset of said plurality of reference patterns all of the members of which are cosignificative and also being a member of a subset of said plurality of reference patterns all of the members of which are co-original.
Claim 2
Dependent Claim
185 words
Apparatus for the classification of patterns, comprising: unclassified representation generating means for generating a representation of at least part of a function of a position-invariant transform of each unclassified pattern presented thereto; transform function representation element value signal set producing means for producing from each of said unclassified representations a set of element value signals each of which represents the value of a property of one of a predetermined constellation of elements thereof; and correlating means for correlating each set of said transform function representation element value signals with at least one set of reference signals; said elements of said unclassified representations being selected in accordance with a statistical property of a plurality of reference representations each of which represents at least part of said function of said position-invariant transform of a reference pattern, and each one of said plurality of reference patterns being a member of a subset of said plurality of reference patterns all of the members of which are cosignificative and also being a member of a subset of said plurality of reference patterns all of the members of which are co-original.
Claim 3
Dependent Claim
28 words
Apparatus for the classification of patterns as claimed in claim 1 in which said statistical property comprises at least one variance matrix of said plurality of reference representations.
Claim 4
Dependent Claim
19 words
Apparatus for the classification of patterns as claimed in claim 2 in which said reference patterns are handwritten numerals.
Claim 5
Dependent Claim
20 words
Apparatus for the classification of patterns as claimed in claim 2 in which said reference patterns are non-standard font numerals.
Claim 6
Dependent Claim
25 words
Apparatus for the classification of patterns as claimed in claim 2 in which at least some of said reference patterns are combinations of handwritten characters.
Claim 7
Dependent Claim
26 words
Apparatus for the classification of patterns as claimed in claim 2 in which at least some of said reference patterns are combinations of non-standard font characters.
Claim 8
Dependent Claim
27 words
Apparatus for the classification of patterns as claimed in claim 1 in which said statistical property is the signification variance matrix of said plurality of reference representations.
Claim 9
Dependent Claim
27 words
Apparatus for the classification of patterns as claimed in claim 1 in which said statistical property is the origination variance matrix of said plurality of reference representations.
Claim 10
Dependent Claim
27 words
Apparatus for the classification of patterns as claimed in claim 1 in which said statistical property is the overall variance matrix of said plurality of reference representations.
Claim 11
Dependent Claim
19 words
Apparatus for the classification of patterns as claimed in claim 1 in which said reference patterns are handwritten numerals.
Claim 12
Dependent Claim
20 words
Apparatus for the classification of patterns as claimed in claim 1 in which said reference patterns are non-standard font numerals.
Claim 13
Dependent Claim
25 words
Apparatus for the classification of patterns as claimed in claim 1 in which at least some of said reference patterns are combinations of handwritten characters.
Claim 14
Dependent Claim
26 words
Apparatus for the classification of patterns as claimed in claim 1 in which at least some of said reference patterns are combinations of non-standard font characters.
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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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |