一种尺度空间特征区域的强鲁棒性水印算法

针对数字水印算法中特征区域选取不足以反映图像重要信息,导致鲁棒性减弱的问题,提出一种尺度空间特征区域的强鲁棒性水印算法。通过尺度空间特征点检测,提取靠近载体图像重心且互不重叠的特征区域,合成特征区域矩阵,用变换域水印算法嵌入水印,对可能受到攻击的含水印图像提取特征区域,合成其特征区域矩阵,用嵌入水印算法逆过程提取水印。实验表明,该算法不仅对常规攻击和噪声攻击都具有强鲁棒性,且不可见性良好。

A strong robust watermark algorithm in the scale space signature area

Area selection based on the digital watermarking algorithm is not enough to reflect the image of important information, lead to decreased robustness problems, put forward a measure space characteristics of the area the strong robustness of watermarking algorithm.Through scale space feature point detection and extraction characteristics near the image center of gravity and non-overlapping regions, regional matrix synthesis characteristics, with the transform domain watermarking algorithm embedding watermarking, the area may contain the watermark image feature extraction under attack, the characteristics of regional matrix synthesis, using inverse process to extract the watermark embedding watermarking algorithm.Experiments show that the algorithm is not only robust to conventional attack and noise attack, but also has good invisibility.