| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide methods and systems for embedding watermarks in digital data and detecting it. <P>SOLUTION: Data are analyzed by an independent component analysis to derive a transform matrix W encoding properties of the data. The data are encoded using this transform matrix W, and a watermark is embedded into them. Then the inverse matrix of the transform matrix is applied to obtain watermarked data. The presence of the watermark is found by applying the transform matrix again, and the result for the presence of the watermark is decided. As said data, image data or other form data are available. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
