US4449240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern recognition system
Assignee: Hajime Industries Ltd
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Filing: 1981-08-12
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Granted: 1984-05-15
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Expires: 2001-08-12
Abstract
Abstract A pattern recognition method is disclosed which makes a judgment that when the difference between an object to be inspected and a previously memorized reference object falls within a predetermined value, the object belongs to the same class as the reference object. During the inspection process, the predetermined value is changed in accordance with the results of past judgment.
Inventors
- 👤 Hajime Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
G; G06; G06V; G06V30/00; G06V30/10; G06V30/19; G06V30/192; G06V30/194
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
A method of pattern recognition comprising: producing an electrical signal related to a standard object of a type exhibiting a pattern to be recognized; storing characteristics of said electrical signal in a pattern recognition system to produce a stored standard signal; setting a predetermined value A for determining whether or not an electrical signal contains characteristics sufficiently close to said stored standard signal to be judged to be the same as said standard object; producing a second electrical signal related to an object being inspected; determining a difference between said second electrical signal and said stored standard signal; outputting a match electrical signal indicating that said second electrical signal represents an object exhibiting said pattern if said difference differs from said predetermined value A by less than a threshold value; outputting a non-match electrical signal indicating that said second electrical signal does not represent an object exhibiting said pattern if said difference differs from said predetermined value A by more than said threshold value; increasing and decreasing a value of said predetermined value A with time in accordance with said difference; and continuing the above steps of producing, determining and outputting for each object being inspected whereby said threshold A is varied according to changing external conditions.
Claim 2
Independent Claim
207 words
A method of pattern recognition comprising: producing an electrical signal related to a standard object of a type exhibiting a pattern to be recognized; storing characteristics of said electrical signal in a pattern recognition system to produce a stored standard signal; setting a predetermined value A for determining whether or not an electrical signal contains characteristics sufficiently close to said stored standard signal to be judged to be the same as said standard object; producing a second electrical signal related to an object being inspected; determining a difference between said second electrical signal and said stored standard signal; outputting a match electrical signal indicating that said second electrical signal represents an object exhibiting said pattern if said difference differs from said predetermined value A by less than a threshold value; outputting a non-match electrical signal indicating that said second electrical signal does not represent an object exhibiting said pattern if said difference differs from said predetermined value A by more than said threshold value; increasing and decreasing a value of said predetermined value A with time in accordance with said difference; and continuing the above steps of producing, determining and outputting for each object being inspected whereby said threshold A is varied according to changing external conditions.
Claim 3
Dependent Claim
48 words
A method according to claim 1, further comprising the steps of averaging said differences over a predetermined number to produce an average difference and wherein the step of increasing and decreasing includes increasing and decreasing a value of said predetermined value A in accordance with said average difference.
Claim 4
Dependent Claim
71 words
A method according to claim 1, further comprising the steps of storing a largest value of said difference when said match electrical signal is produced, storing the smallest value of said difference when said non-match electrical signal is produced and the step of increasing and decreasing includes increasing and decreasing a value of said predetermined value A in accordance with the size of both said largest value and said smallest value.
Claim 5
Dependent Claim
32 words
A method according to claim 3, wherein said step of increasing and decreasing includes producing a mean of said largest and smallest values and substituting said mean for said predetermined value A.
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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |