Self-registering spread-spectrum barcode method
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United States of America Patent
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Nov 9, 2004
Grant Date -
Dec 5, 2002
app pub date -
May 30, 2001
filing date -
May 30, 2001
priority date (Note) -
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Abstract
A novel spread spectrum barcode methodology is disclosed that allows a barcode to be read in its entirety even when a significant fraction or majority of the barcode is obscured. The barcode methodology makes use of registration or clocking information that is distributed along with the encoded user data across the barcode image. This registration information allows for the barcode image to be corrected for imaging distortion such as zoom, rotation, tilt, curvature, and perspective.
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