CREATION AND PLACEMENT OF TWO-DIMENSIONAL BARCODE STAMPS ON PRINTED DOCUMENTS FOR STORING AUTHENTICATION INFORMATION
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United States of America Patent
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N/A
Issued Date -
Sep 24, 2009
app pub date -
Mar 18, 2008
filing date -
Mar 18, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A document authenticating method is disclosed by which numerous small-sized two-dimensional barcode stamps are generated and placed in a distributed manner on a printed document. The small-sized barcode stamps collectively encode the content of the document to be used for document authentication. In one example, the stamp size is 1 cm by 1 cm and the tile size for the stamps is 4 by 4 pixels at a resolution of 400 dpi. A total of approximately 80 such small barcode stamps are placed on the page to form a pattern that resembles a border on one or more sides of the page. In one particular example, the stamps are placed on all four sides of the page to form a frame. Such a stamp layout minimizes undesirable visual effect and can create a decorative effect. Small-sized stamps also allow reduced tile sizes and increased information density.
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