Method for image encoding
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United States of America Patent
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Jun 6, 2000
Issued Date -
N/A
app pub date -
May 24, 1999
filing date -
Jul 31, 1992
priority date (Note) -
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Abstract
Plural-bit data is encoded in an image without leaving apparent evidence of image alteration. The image is represented by data elements (e.g., pixels) whose values are changed to effect the encoding. The changes are desirably effected in groups, e.g., pixel groupings 5-10 pixels in height and width, and in a manner calculated to keep the changes relatively inconspicuous.
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