一种基于能量集中的数字水印嵌入方法

数字水印技术为信息隐藏、数据安全提供了一个有效的版权保护手段。目前大多数数字水印技术很难同时保证水印图像的透明性和鲁棒性。依据能量集中区域为水印图像嵌入区域，提出了一种强透明性同时不失鲁棒性的数字水印嵌入方法。通过寻找载体图像小波变换后逼近图的能量集中区域，将加密后的水印图像嵌入其中。试验结果表明，该方法有较好的透明性和鲁棒性，在附加噪声、JPEG压缩、旋转情况下有较好的抵抗能力。

A Robust Digital Watermarking Based on the Energy Focused Region

Digital watermark technology is an effective copyright protection method in information hiding and data security. Most digital watermark methods are hard to ensure both robustness and invisibility of the watermark image. In order to improve the invisibility of the embedded digital watermark and keep the robustness, a robust digital watermarking algorithm based on the energy focused region is proposed. The original image is transformed twice by wavelet transform. Then, the energy focused region where the encrypted digital watermark is embedded is searched in the approximate image. Experimental results show that the proposed algorithm has higher invisible and good robust. This method has better ability of resisting in additional noise, JPEG compression, and image rotator.