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US5365600A
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Image processing system
Assignee: ATR Auditory and Visual Perception Res Labs
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Filing: 1993-06-11
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Granted: 1994-11-15
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Expires: 2013-06-11
Abstract
Abstract When an image is entered from an input means, a line extracting means extracts and smoothes the contour of that image to obtain a tangent line passing through a certain point on that contour. A region with the certain point as the origin is determined, where Hough transform of a straight line is carried out with the center point of that region as the origin. Hough transform is carried out for all the points adjacent to the origin to obtain an envelope. A tangent line is predicted by the obtained envelope.
Inventors
- 👤 Michihiro Nagaishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:37
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/40; G06V10/48
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
An image processing system comprising: input means for entering an image; line extracting means for extracting a straight line going through a selected point on said image entered by said input means according to Hough transform with said selected point as the origin, said line extracting means having (a) contour extracting means for extracting a contour according to the continuous state of pixels forming said image entered by said input means, (b) region determinating means for determining a region in which said selected point and adjacent points go through said region, and (c) transformation means for carrying out Hough transform of said straight line with said selected point as the center point of said region and as the origin to predict said contour; and output means for providing the extraction result by said line extracting means.
Claim 2
Dependent Claim
136 words
An image processing system comprising: input means for entering an image; line extracting means for extracting a straight line going through a selected point on said image entered by said input means according to Hough transform with said selected point as the origin, said line extracting means having (a) contour extracting means for extracting a contour according to the continuous state of pixels forming said image entered by said input means, (b) region determinating means for determining a region in which said selected point and adjacent points go through said region, and (c) transformation means for carrying out Hough transform of said straight line with said selected point as the center point of said region and as the origin to predict said contour; and output means for providing the extraction result by said line extracting means.
Claim 3
Dependent Claim
22 words
The image processing system according to claim 1, further comprising smoothing means for smoothing said contour extracted by said contour extracting means.
Claim 4
Dependent Claim
16 words
The image processing system according to claim 2, wherein said smoothing means comprises a Gaussian filter.
Claim 5
Dependent Claim
42 words
The image processing system according to claim 1, wherein said transformation means comprises means for carrying out Hough transform for all points adjacent to said origin for obtaining an envelope, and means for estimating a tangent line from said obtained envelope lines.
References Cited (Backward Citations)
US4707647A
Cited
US5054098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-14 | 1998-05-16 | 1998-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-14 | 2002-05-16 | 2002-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-14 | 2006-05-16 | 2006-11-15 | $7700.00 | Window Closed / Lapsed |