关键词: 特征点, Harris检测算子, 伪Zernike矩, 几何攻击, 信号处理攻击

Abstract:

The improvement of the robustness watermarking against geometrical attacks is still a difficult and open problem for watermarking researchers.This paper proposes a geometrically invariant watermarking algorithm based on Harris detector and the pseudo Zernike moment.First the Harris detector is utilized to extract steady feature points from the standard image,then the local feature regions are ascertained according to the feature scale theory,and finally the digital watermark is embedded into the local feature regions by quantizing the magnitudes of the pseudo Zernike moments.Experimental results show that the proposed watermarking algorithm is robust to geometric attacks as well as to common signal processing attacks.

Key words: feature points;Harris detector;pseudo Zernike moments;geometric attacks;signal processing attacks