US4435837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern recognition and orientation system
Assignee: Harvard University
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Filing: 1981-03-05
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Granted: 1984-03-06
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Expires: 2001-03-05
Abstract
Abstract A system that automatically scans the shape of a flat object located in a viewing field, recognizes the shape by identifying at least one moment (e.g., the first moment, area; the second moments, products of inertia; or a higher moment), calculates the centroid and angle of inclination of a principal axis, and then moves the object to a desired location and into a desired orientation.
Inventors
- 👤 Frederick H. Abernathy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:22
CPC Classifications
B; B25; B25J; B25J9/00; B25J9/16; B25J9/1694; B25J9/1697; B26; B26D; B26D5/00; B26D5/007; B26D5/20; B26D5/30; B26D5/34; B26D7/00; B26D7/01; B26D7/015; B26D7/018; B26F; B26F1/00; B26F1/38; B26F1/40; B26F1/405; G; G06; G06T; G06T7/00; G06T7/70; G06T7/73; G06T7/74; G06V; G06V10/00; G06V10/20; G06V10/40; G06V10/42; G06V10/435
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
A method for recognizing a flat piece of cloth comprising placing said piece on a viewing surface within a field of interest having perpendicular coordinate axes, generating image signals corresponding to the existence or nonexistence of said piece in discrete areas of said field, said discrete areas being arranged in rows and columns along said axes, processing said image signals to obtain observed moment signals representative of the first (area) and the second (sum of the products of inertia I xx , I yy ) moments of said piece, generating desired signals for the corresponding first and second moments of a desired piece, identifying said piece by comparing said observed moment signals with said desired moment signals, and generating a default signal when a difference between said observed and desired signals exceeds a certain limit.
Claim 2
Independent Claim
135 words
A method for recognizing a flat piece of cloth comprising placing said piece on a viewing surface within a field of interest having perpendicular coordinate axes, generating image signals corresponding to the existence or nonexistence of said piece in discrete areas of said field, said discrete areas being arranged in rows and columns along said axes, processing said image signals to obtain observed moment signals representative of the first (area) and the second (sum of the products of inertia I xx , I yy ) moments of said piece, generating desired signals for the corresponding first and second moments of a desired piece, identifying said piece by comparing said observed moment signals with said desired moment signals, and generating a default signal when a difference between said observed and desired signals exceeds a certain limit.
Claim 3
Dependent Claim
57 words
The method of claim 1 including the additional steps, carried out when no default signal is generated, comprising processing said image signals to obtain signals representative of the angle between the principal axis of said piece and one of said field axes, and moving said piece to a desired location in response to the last said signals.
Claim 4
Dependent Claim
138 words
Clothing manufacturing apparatus for recognizing a flat piece of cut cloth placed within a field of interest having perpendicular coordinate axes, said apparatus comprising a member having flat viewing surface for supporting said piece, a viewer to generate image signals corresponding to the existence or nonexistence of said piece in discrete areas of said field, said discrete areas being arranged in rows and columns along said axes, means to process said image signals to obtain observed moment signals representative of the first (area) and the second (sum of the products of inertia I xx , I yy ) moments of said piece, means to generate desired signals for the corresponding first and second moments of a desired piece, and means to generate a default signal when a difference between said observed and desired signals exceeds a certain limit.
Claim 5
Dependent Claim
138 words
Clothing manufacturing apparatus for recognizing a flat piece of cut cloth placed within a field of interest having perpendicular coordinate axes, said apparatus comprising a member having flat viewing surface for supporting said piece, a viewer to generate image signals corresponding to the existence or nonexistence of said piece in discrete areas of said field, said discrete areas being arranged in rows and columns along said axes, means to process said image signals to obtain observed moment signals representative of the first (area) and the second (sum of the products of inertia I xx , I yy ) moments of said piece, means to generate desired signals for the corresponding first and second moments of a desired piece, and means to generate a default signal when a difference between said observed and desired signals exceeds a certain limit.
Claim 6
Dependent Claim
53 words
Apparatus as claimed in claim 3 including further processing means, operative when no default signal is generated, to obtain signals representative of the the angle between the principal axis of said piece and one of said field axes, and means responsive to the last signals to move said piece to a desired location.
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |