Electronic watermarking method and apparatus for color image...

Details Electronic watermarking method and apparatus for color image... Electronic watermarking method and apparatus for color image...

2006-12-26

2011-12-20

Bhatnagar, Anand (Department: 2624)

Image analysis

Applications

C382S232000

Reexamination Certificate

active

08081793

ABSTRACT:
Multi-color image data received from a host device are divided into blocks. The brightness of at least a first color in each block is tested to determine whether the block is watermarkable. An electronic watermark is embedded into each watermarkable block by modifying the image data of at least a second color. The image data of the second color can then be combined with image data of the other colors to generate watermarked output image data or print a watermarked image. The electronic watermark can be read from the watermarked image with a low error rate.

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