一种基于纹理特性的自适应彩色图像水印方法

根据人眼的视觉系统特性,结合二维离散小波变换的多分辨率分析特性,纹理特性,提出一种小波零树结构的自适应彩色图像水印嵌入算法。该算法精选小波零树,对重要小波系数进行分类。并根据人类视觉特性和纹理特性,对不同类采用不同的嵌入方法。实验结果表明:该文提出的算法有较强的抵抗JPEG压缩攻击能力,并且对噪声、滤波、剪切等图像处理操作也取得了良好的鲁棒性。

An adaptive watermarking for color images based on venation characteristics

In view of the human visual system(HVS) and by employing the characteristics of multi-resolution analysis of the two-dimension discrete wavelet transform(DWT) and venation characteristics,an adaptive watermark embedding algorithm is proposed in this paper.The wavelet zerotrees are selected carefully and the important wavelet coefficients of the lowest frequency are classified in the algorithm.According to different groups,the watermark was embedded in different ways through the human visual system and the characteristic of texture.The experimental results show that this algorithm is robust against JPEG compression attack,image processing such as noise,filtering,cropping, etc.