Processing methods combining multiple frames of image data
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United States of America Patent
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Mar 18, 2008
Grant Date -
N/A
app pub date -
May 2, 2000
filing date -
May 2, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A document authentication station, for use with passports or the like, includes a 2D image sensor (e.g., CCD- or CMOS-based video camera), and a computer device. The image sensor produces produce image data corresponding to a presented document. From this image data, the computer extracts two or more identification data. One is a digital watermark. The other can be a bar code, data glyphs, OCR data, etc. The processor then proceeds to check that the two identification data correspond in an expected fashion. If not, the document is flagged as suspect or fake. Reliability of detection may be enhanced by processing plural frames of data from the image sensor before issuing a result.
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