検出時に原画像情報が不要なDCTフラクタル符号化による電子透かし

抄録

This paper proposes a digtal watermarking scheme based on fractal image coding with DCT coefficient and needs no infomation about the original image. In previous work, we have proposed the digital watermarking scheme based on fractal image coding with DCT coefficient between range block and domain block. That had high tolerance for image processing in comparison with conventional scheme. However, it had a problem to have to preserve the information about the original image used for embedding data every image. In the proposal, we choose two parameters in applying fractal encoder among the respective parts, denoted as the even and odd column, so that we can extract data without resorting to the original image. Numerical experiments have been performed in order to measure the validity of the proposal.