Apparatus and method for inserting an updateable hidden image into an optical path
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United States of America Patent
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Sep 23, 2003
Grant Date -
Jun 26, 2003
app pub date -
Dec 21, 2001
filing date -
Dec 21, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for optically embedding hidden data in a source image, wherein the hidden data is updateable in real-time, the apparatus includes (a) optical masks bearing a data image and an encoding carrier image either or both of which may be updated in real-time; (b) optical components for convolving, the data image with the encoding carrier image to produce a spatially dispersed data image; and (c) optical beam combiner for combining the spatially dispersed data image with the source image to produce a source image containing embedded hidden data.
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