| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic watermark system considering the type of an attack which can be performed to an electronically watermarked image. SOLUTION: Methods and systems for quantization and data embedding are described. 700 is a computation system, 702 is a marking component, 704 is a transform component, 706 is a linear statistic generator, 708 is a lattice quantizer, 710 is an electronic watermark generator, 712 is an electronic watermark embedder, and 714 is an electronic watermark receiver. A transform is applied on an image that is to be watermarked and statistics associated with the image are computed. The computed statistics are quantized using a symmetric lattice, and a watermark is computed using the lattice quantized statistics. The watermark is then inserted into the image. COPYRIGHT: (C)2006,JPO&NCIPI
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