基于系数奇偶量化的图像水印算法

A DWT Image Watermarking Algorithm Based on Quantization

文中提出了一种新的基于系数奇偶量化的图像小波域数字水印算法,该算法首先对水印图像进行置乱处理,载体图像的小波变换系数经奇偶量化后,将置乱后的水印图像嵌入其中。算法对小波系数的奇偶量化性能在鲁棒性和水印的不可见性上进行了很好的折衷,实验表明该算法对载体图像的影响较小且具有很好的鲁棒性,可以有效地抵抗JPEG压缩、噪声干扰等常见的攻击。

This paper proposes an effective DWT image watermarking algorithm based on quantization. The algorithm first scrambles the watermark, then embeds the transformed watermark into odd-even quantized DWT coefficients of the original image. The performance of this algorithm is well compromised between the robustness of odd-even quantization and the invisibility of watermarking. Experiments indicate that the algorithm is robust and has little impact on the image, and could effectively resist the attacks of JPEG compression etc.