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EP0173098A2
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Pattern outline tracking method and apparatus
Assignee: Omron Corp
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Filing: 1985-07-31
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Granted: —
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Expires: 2005-07-31
Abstract
Abstract 57 A pattern outline tracking system provides the functions that include scanning an object to be recognized and providing a series of analog video signals, comparing the video signal level with the specific, variable threshold level and providing a binary signal consisting of a sequence of serial bits, holding the binary signal bits as the input image pattern in an image memory, deriving partial patterns sequentially from the serial binary signal bits, each of the partial patterns consisting of a matrix of vertical and horizontal lines each containing the specific numbers of pixels, matching the partial patterns against the corresponding reference patterns containing the previously defined starting points to be tracked, holding the address in the image memory for the certain pixel i within the partial pattern identified in the matching step as the possible point address for the tracking operation, and tracking the outline of the input image pattern on the image memory in accordance with the possible point address.
Inventors
- 👤 Kazuhiko C/O Omron Tateisi Electr. Co. Saka
- 👤 Atsushi C/O Omron Tateisi Electr. Co. Hisano
- 👤 Michitaka C/O Omron Tateisi Electr. Co. Kato
- 👤 Toshimichi C/O Omron Tateisi Electr. Co. Masaki
- 👤 Nobuo C/O Omron Tateisi Electr. Co. Nakatsuka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 14:58
CPC Classifications
G; G06; G06T; G06T9/00; G06T9/20; G06V; G06V10/00; G06V10/40; G06V10/46
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A pattern outline tracking apparatus comprising: a pickup device for scanning an object to be recognized and providing a series of analog video signals; a binary signal encoder for comparing the video signal level with the specific threshold level and providing a binary signal consisting of a sequence of serial bits; image memory means for holding the binary signal bits as the input image pattern; partial pattern extracting means for deriving partial patterns sequentially from the serial binary signal bits, each of said partial patterns consisting of a matrix of vertical and horizontal lines each containing the specific numbers of pixels; comparator means for matching the partial patterns against the corresponding reference patterns containing the previously defined starting points to be tracked; storage means for holding the address in said image memory for the certain pixel within the partial pattern identified by said comparator means as the possible point address for the tracking operation, said storing operation being performed according to the result of the matching: and means for tracking the outline of said input image pattern on said image memory in accordance with said possible point address.
Claim 2
Dependent Claim
188 words
A pattern outline tracking apparatus comprising: a pickup device for scanning an object to be recognized and providing a series of analog video signals; a binary signal encoder for comparing the video signal level with the specific threshold level and providing a binary signal consisting of a sequence of serial bits; image memory means for holding the binary signal bits as the input image pattern; partial pattern extracting means for deriving partial patterns sequentially from the serial binary signal bits, each of said partial patterns consisting of a matrix of vertical and horizontal lines each containing the specific numbers of pixels; comparator means for matching the partial patterns against the corresponding reference patterns containing the previously defined starting points to be tracked; storage means for holding the address in said image memory for the certain pixel within the partial pattern identified by said comparator means as the possible point address for the tracking operation, said storing operation being performed according to the result of the matching: and means for tracking the outline of said input image pattern on said image memory in accordance with said possible point address.
Claim 3
Dependent Claim
20 words
The pattern outline tracking apparatus as defined in claim 1, wherein said binary signal encoder includes a floating threshold circuit;
Claim 4
Dependent Claim
67 words
The pattern outline tracking apparatus as defined in claim 1, wherein said partial pattern extracting means includes multistage shift registers connected in series, each of said shift registers having serial input and serial output and containing a series of cells or bit storage locations, some of said cells for each shift register providing parallel pixel data bits which are all combined together to construct a partial pattern.
Claim 5
Dependent Claim
158 words
A pattern outline tracking method comprising the steps of: scanning an object to be recognized and providing a series of analog video signals; comparing the video signal level with the specific, variable threshold level and providing a binary signal consisting of a sequence of serial bits; holding the binary signal bits as the input image pattern in an image memory; extracting partial patterns sequentially from the serial binary signal bits, each of said partial patterns consisting of a matrix of vertical and horizontal lines each containing the specific numbers of pixels; matching the partial patterns against the corresponding reference patterns containing the previously defined starting points to be tracked; holding the address in said image memory for the certain pixel within the partial pattern identified in said matching step as the possible point address for the tracking operation; and tracking the outline of said input image pattern on said image memory in accordance with said possible point address.
Claim 6
Dependent Claim
158 words
A pattern outline tracking method comprising the steps of: scanning an object to be recognized and providing a series of analog video signals; comparing the video signal level with the specific, variable threshold level and providing a binary signal consisting of a sequence of serial bits; holding the binary signal bits as the input image pattern in an image memory; extracting partial patterns sequentially from the serial binary signal bits, each of said partial patterns consisting of a matrix of vertical and horizontal lines each containing the specific numbers of pixels; matching the partial patterns against the corresponding reference patterns containing the previously defined starting points to be tracked; holding the address in said image memory for the certain pixel within the partial pattern identified in said matching step as the possible point address for the tracking operation; and tracking the outline of said input image pattern on said image memory in accordance with said possible point address.
References Cited (Backward Citations)
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