摘要
首先转换彩色图像的颜色空间抽取相应的灰度图像,再对灰度图像进行提升小波分解,在分解过程中利用图像压缩操作,引起近半数的小波系数增大,另一半系数减小,基于系数增减特征实现版权水印和消费者数字指纹的同时嵌入,从而获得版权认证和盗版追踪的双重功能。仿真实验表明该算法具有良好的鲁棒性和不可感知性。
After transforming the color image in color space to extract the gray-level image, the gray-level image is decomposed with lifting wavelet transformation. In the decomposing process, the image is compressed to cause a half of wavelet coefficients to increase and the other half to decrease. The algorithm embeds a seller＇ s copyright watermark and a buyer＇ s digital fingerprint in the same work based on this kind of coefficient characteristics, so it can be used to identify who holds the legal copyright of the work and trace the illegal reseller. The experiments show that this algorithm has good robustness and imperceptibility.
出处
《信息技术》
2009年第12期1-4,8,共5页
Information Technology
基金
河北省自然科学基金项目(F2008000460)
