出版社：The Institute of Image Information and Television Engineers
摘要：We describe a lossless digital watermarking technique that uses the characteristics of a number theoretic transform (NTT). Our method generates bit sequences, which restore the original image during the extraction procedure, by using NTT coefficients. These sequences are easy to compress thanks to the coefficients' regularity. The compressed sequences, which are the restoration data, and the side information are embedded in the NTT coefficients of the original image. In the extraction procedure, the original image can be restored by using the restoration data. Because the NTT has no round-off error, this method can completely restore the original image. A simulation experiment was conducted to test the effectiveness of our method.
