基于人眼视觉模型的图像水印技术

数字水印作为数字产品版权保护的有效手段，近年来引起了人们的广泛的重视。针对数字图像水印进行了研究，提出了一个基于离散余弦变换(DCT)的图像水印新方案。该方案利用人眼视觉系统的视觉模型函数，将水印嵌入在图像的高频、中频和低频等成分中。实验结果表明，该水印方案体现了图像的鲁棒性和不可视性间的统一，使得所嵌入具有良好的抗噪声干扰和常规图像处理的能力。

Digital Watermarks Based on the Human Visual System

As an effective method to provide copyright protection for digital product, digital watermarking has drawn extensive attention recently. Based on the modulation transfer function (MTF) of the human visual system(HVS), this paper proposes a new scheme of digital watermarking that embedding the watermarks into the high-frequency, low-frequency and med-frequency of the image. The experimental results demonstrate its better unification between the watermarking robustness and watermarking invisibility, the watermarking with the proposed scheme is robust against noise interference and commonly used image technique.