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1. A system for obtaining a signature from an article, the article having a scan area on a surface of the article from which a signature of the article may be read, the system comprising:
- a signature generator comprising a scan head having;
an optical source operable to direct coherent radiation onto a plurality of regions in the scan area; and
a detector arrangement operable to collect a set comprising groups of data points by detecting scattered coherent radiation from the regions in the scan area, wherein different ones of the groups of data points relate to scatter from the respective different regions of the scan area;
the signature generating operable to determine a signature of the article from the set of data points;
a camera operable to capture an image of the surface of the article;
an image comparator operable to compare the captured image with a reference image of an article of the same class which includes the scan area of that article, to determine the location and orientation of the scan area on the said article; and
a drive assembly operable to position the scan head in a location and orientation suitable for generating a signature from the scan area on the article, in response to the determination of the location and orientation of the scan area.
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Abstract
A system for obtaining a signature from a scan area on the surface of an article comprises: a signature generator that generates the signature from scattered coherent radiation detected from a plurality of points on the surface and includes a scan head comprising a coherent radiation source and photodetectors; a camera for capturing an image of the surface; a comparator that compares the captured image with a reference image to determine the location and orientation of the scan area; and a drive assembly that positions the scan head appropriately for generating a signature from the scan area in response to the determination of the location and orientation of the scan area.
105 Citations
20 Claims
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1. A system for obtaining a signature from an article, the article having a scan area on a surface of the article from which a signature of the article may be read, the system comprising:
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a signature generator comprising a scan head having; an optical source operable to direct coherent radiation onto a plurality of regions in the scan area; and a detector arrangement operable to collect a set comprising groups of data points by detecting scattered coherent radiation from the regions in the scan area, wherein different ones of the groups of data points relate to scatter from the respective different regions of the scan area; the signature generating operable to determine a signature of the article from the set of data points; a camera operable to capture an image of the surface of the article; an image comparator operable to compare the captured image with a reference image of an article of the same class which includes the scan area of that article, to determine the location and orientation of the scan area on the said article; and a drive assembly operable to position the scan head in a location and orientation suitable for generating a signature from the scan area on the article, in response to the determination of the location and orientation of the scan area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for obtaining a signature from an article, the article having a scan area on a surface of the article from which a signature of the article may be read, the method comprising:
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capturing an image of the surface of the article; comparing the captured image with a reference image of an article of the same class which includes the scan area of that article, to determine the location and orientation of the scan area on the said article; and generating a signature from the article by directing coherent radiation onto a plurality of regions in the scan area;
collecting a set comprising groups of data points from signals obtained when the coherent radiation scatters from the regions in the scan area wherein different ones of the groups of data points relate to scatter from the respective different regions of the scan area; and
determining a signature of the article from the set of data points;
the signature being generated using a scan head comprising an optical source operable to direct coherent radiation onto the scan area and a detector arrangement operable to collect the data points by detecting the scattered coherent radiation;
wherein the scan head is positioned in a location and orientation suitable for generating a signature from the scan area on the article in response to the determination of the location and orientation of the scan area. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification
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Current AssigneeIngenia Holdings Limited
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Original AssigneeIngenia Holdings Limited
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InventorsCowburn, Russell Paul, Seem, Peter Robert
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Application NumberUS12/501,303Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current358/488CPC Class CodesG06V 10/255 Detecting or recognising po...G07D 7/2033 Matching unique patterns, i...
