基于像素能量分布的自适应差分能量水印算法

Adaptive difference energy watermarking based on distribution of pixel energy

为了提供一种新型的版权保护手段,应用于视频内容安全领域,提出了一种基于像素能量分布的自适应差分能量水印安全算法。对水印图像做置乱;根据Watson视觉模型计算出水印承载区域的可调能量阈值;然后比较该阈值与能量差的大小,以决定是否在该区域嵌入水印。实验证明,该算法在保证水印不可感知性的前提下能够避开能量差过大的区域,进而增强水印的鲁棒性。

To provide a novel means of copyright protection which could be used in the field of video content security, an adaptive difference energy watermarking based on the distribution of pixel energy was proposed. The watermark image was scrambled and the power adjustable threshold of the watermark＇s bearing region based on the Watson visual model was calculated. Whether to embed watermark in the region based on the comparison of threshold and energy difference was decided. Experiments show that this algorithm can enhance the robustness by avoiding areas of large energy difference on the premise of watermark unperception.