在数字媒体交易应用中,水印算法必须符合交易协议的要求.提出一种新的彩色图像交易水印算法.算法基于Cox框架思想与提升小波变换(LWT)的特点、把卖方的版权水印与买方的数字指纹嵌入同一幅图像中,能与相应的水印交易协议相结合,实现对图像作品合法版权的鉴别、对非法盗版者的追踪.算法对一种现有小波域水印方案进行了实质性改进,显著提高了水印的不可感知性.%In view of that digital watermarking algorithms have to accord with the basic requirements of digital media marketing protocol,a buyer-seller watermarking scheme is presented for color images based on Cox framework and wavelet transformation.The algorithm embeds a seller' s copyright watermark and a buyer' s digital fingerprinting in the same color image,so it can combine an appropriate buyer-seller watermarking protocol to identify who holds the legal copyright of the work and trace the illegal reseller.In our scheme a wavelet domain algorithm essentially is improved and got better performance in the aspect of imperceptibility.
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