Digital watermarking of physical objects
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 20, 2004
Issued Date -
N/A
app pub date -
May 1, 2000
filing date -
Jul 31, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A machine readable indicia is formed in a blank printable medium. The indicia may be formed in an opacification layer applied to a translucent substrate, or may be formed in a laminate layer. The indicia is optically detectable from the exterior of the medium, even if the indicia is not formed on the medium's exterior surface. One particular indicia is a seemingly-random weave-like pattern of lines defined in response to (1) a first user control that determines a degree of randomness of the line(s), (2) a second user control that determines a modulation effect to be applied to the line(s), and (3) the bits to be represented thereby. Many other indicia, including checkerboards, barcodes, data glyphs, etc., can also be used.
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Cited Art Landscape
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