Image processing techniques for printing identification cards and documents
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United States of America Patent
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Sep 16, 2014
Issued Date -
N/A
app pub date -
Oct 18, 2010
filing date -
Apr 9, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to identification documents, and in particular to pre-printing processing covert images, such as UV or IR images, provided on such identification documents. In one implementation, the invention provides a method of processing a digital image that is to be printed on a surface of an identification document as a fluorescing-capable image to improve the quality of the image. Edges or boundaries are detected within the image, the detected edges or boundaries forming an intermediate image. The edges or boundaries within the image are emphasized, and the emphasized image is used for printing the covert image. In some implementations of the invention, a digital watermark is embedded in the covert image.
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Family
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Cited Art Landscape
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