Methods and apparatus for using imaging information to improve scanning accuracy in bar code scanners
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United States of America Patent
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Jun 13, 2006
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app pub date -
Dec 6, 2004
filing date -
Oct 4, 2002
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Abstract
Techniques for using imaging information computed from examining a scanner signal are described. When one or more objects passes within a field of view of a scanner, scan patterns emerging from one or more scanner windows and reflected from the objects back into the scanner windows produce one or more scanner signals. The scanner signals are processed to obtain beam position and beam length information to improve the accuracy of bar code decoding and to compute imaging information for objects within the field of view of the scanner. The imaging information for the objects is compared with bar code information for the objects. The expected number, size and shapes of objects indicated by the bar code information is compared with the actual number, size and shapes of objects in order to determine if valid scans occurred or if missed, double or otherwise erroneous scans occurred.
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- NCR CORPORATION
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Burkey, John Kenneth | Duluth, GA | 2 | 48 |
Detwiler, Paul Oliver | Lawrenceville, GA | 12 | 108 |
Gu, Yeming | Suwanee, GA | 25 | 548 |
Mergenthaler, Barry M | Lawrenceville, GA | 30 | 1045 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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