Intel Corporation

Suman Kumar Mitra

Tinku Acharya

Bhargab Bikram Bhattacharya

Chivukula Anjaneya Murthy

Malay Kumar Kundu

A method of encoding a watermark into a digital image. The method includes partitioning an original image into blocks and then determining a variance value of each block. The blocks are then arranged according to the variance values. A number of selected blocks are identified, where the number depends upon the size of the watermark. The blocks selected are then arranged by their location. Data from the watermark is used to replace bits in a representation of each of the selected blocks with data from the watermark. A method of decoding is also discussed.

Method for block-based digital image watermarking

Several embodiments in accordance with the invention are disclosed. An embodiment for compressing a gray scale image is described and an embodiment for decompressing the codebook produced by compressing the gray scale image is described. Of course, the invention is not limited to only gray scale images, however.

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Shibpur, India

Suman Kumar Mitra