Digital watermarking method with the reduction image-processing tolerance using smearing-desmearing transformation

摘要

We propose the new digital watermarking method which can generate watermark embedding pictures of high quality and robustly holds the watermark information when the digital picture was reduced. This method is realized by using a smearing-desmearing transformation and ascending-order sort transformation for a signature picture, and embedding in an original-picture image. As a concrete example, we show the tolerance of the signature picture to a reduction image processing with a computer experiment. Moreover, it is shown that watermark embedding pictures are generated of high quality and validity of this method is clarified.