| 摘要 |
PROBLEM TO BE SOLVED: To make an object with an electronic watermark from being damaged due to a destructive action by converting a digital object and integrating an electronic watermark to the converted digital object through adjustment of an argument to form the object with the mark integrated thereto. SOLUTION: An original image f (i, j) is converted into a converted image F (k, l) 210, the converted image is adjusted by using an electronic watermark w (k, l) 230 to generate an electronic watermark integrated converted image G (k, l) 260. For example, in the case that the processing using the electronic watermark w (k, l) 230 is expressed as G(k, l)=F(k+w(k, l),l+w(k, l)), electronic watermark elements that equal to '1' are formed by shifting elements of the converted image to the upper left. Thus, in the case of the usual operation, the generated electronic watermark is not deteriorated. Then inverse conversion is applied to the electronic watermark integrated converted image G (k, l) 260 to generate the electronic watermark integrated image g (i, j). |
