关键词: 数字水印, 缩放攻击, 差分特征点, 网格, 疑似网格点

Abstract: By embedding the watermarking with synchronous information frames in DCT domain and constructing a grid of difference feature points with fixed interval and fixed difference in space domain, a blind digital watermarking scheme against scaling attack was designed. The grid of difference feature points was defined, the embedding and extracting methods were given, and the algorithm for obtaining scaling factors was also presented. The experimental results show that the proposed scheme is robust to scaling attack.

Key words: digital watermarking, scaling attack, difference feature point, grid, suspicious grid point