US3582898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern recognition devices
Assignee: EMI Ltd
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Filing: 1967-12-21
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Granted: 1971-06-01
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Expires: 1987-12-21
Abstract
Abstract The present invention relates to pattern recognition devices, that is to say devices, which in response to an applied representation of an unknown pattern, for example, in the form of a plurality of binary digits, produce an output signal representing the identity of a known pattern most clearly resembling the unknown pattern. One difficulty which is encountered in pattern recognition arises from the fact that the representation may be derived from, for example, printed characters or other patterns which have suffered translation, rotation or even change of size in relation to other such characters, with the result that the device has to be capable of recognizing the same character or pattern with different values of such parameters and this can lead to an undesirable increase in the storage required in the pattern recognition device.
Inventors
- 👤 Christopher Archibald Gord May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:12
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/70; G06V10/74; G06V10/75; G06V10/751; G06V10/7515
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
169 words
A pattern recognition device including means for transforming an input signal related to a pattern to be recognized to provide a transformed signal, and means responsive to said transformed signal for deriving the most likely identity of said pattern to be recognized, wherein said transforming means includes: a. input terminals for said input signal, b. storage means conditioned to store groups of representations of known patterns, each group being formed of representations of a respective known pattern with different values of at least one parameter of the known patterns, c. means for comparing said input signal with each of said representations to produce similarity signals indicating the degrees of similarity therebetween, d. means for selecting a similarity signal of an extreme value for each group of representations, and e. means for assembling the similarity signals of extreme values so as to provide said transformed signal, whereby said transformed signal is substantially less dependent upon said at least one parameter of said pattern to be recognized than said input signal.
Claim 2
Dependent Claim
169 words
A pattern recognition device including means for transforming an input signal related to a pattern to be recognized to provide a transformed signal, and means responsive to said transformed signal for deriving the most likely identity of said pattern to be recognized, wherein said transforming means includes: a. input terminals for said input signal, b. storage means conditioned to store groups of representations of known patterns, each group being formed of representations of a respective known pattern with different values of at least one parameter of the known patterns, c. means for comparing said input signal with each of said representations to produce similarity signals indicating the degrees of similarity therebetween, d. means for selecting a similarity signal of an extreme value for each group of representations, and e. means for assembling the similarity signals of extreme values so as to provide said transformed signal, whereby said transformed signal is substantially less dependent upon said at least one parameter of said pattern to be recognized than said input signal.
Claim 3
Dependent Claim
94 words
A device according to claim 1 wherein each location of said storage means is conditioned to store one of said representations and a signal indicative of the identity of the known pattern from which the representation is derived, said means for assembling said similarity signals of extreme values including separate recording means for each identity and means for applying the similArity signal of an extreme value for each group of representations to the recording means which is respective to the identity of the known patterns from which the representations of the group are derived.
Claim 4
Dependent Claim
142 words
A device according to claim 1 including: a. a plurality of transforming means each having input terminals for an input signal and output terminals for a transformed signal, and b. means connecting the output terminals of a first of said transforming means to the input terminals of a second of said transforming means and so as to connect the transforming means in cascade, wherein c. the storage means of each of said transforming means is conditioned to store groups of representations of known patterns, each group being formed of representations of a respective known pattern with different values of at least one parameter of the known patterns, in which the at least one parameter is respective to the transforming means, and d. said means responsive is responsive to the transformed signal from the output terminals of the last of said transforming means.
Claim 5
Dependent Claim
80 words
A device according to claim 1 including: a. further input terminals for an identity signal representing the identity of a known pattern from which an input signal is derived, and b. means responsive to said input signal derived from a known pattern and its identity signal to enter in a vacant location of the storage means a representation of the known pattern and its identity signal whereby the representations may be entered into the storage means by a teaching process.
Claim 6
Dependent Claim
86 words
A device according to claim 4 wherein the means for entering a representation into the storage means includes: a. means for deriving the representation from the storage means which bears the greatest resemblance to the input signal derived from the known pattern, b. means for comparing the identity of the pattern from which said representation which bears the greatest resemblance is derived with the identity of said known pattern, and c. means for inhibiting an entry into said storage means if said identities are the same.
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |