基于小波变换的静态二维图像数字水印算法研究

对基于小波变换的静态二维图像数字水印技术提出了一种新的算法,利用小波图像系数各层间的关系,进行水印的嵌入,并根据所设计的算法,对原灰度水印图像及彩色水印图像进行预选择或构造特殊的伪码水印对算法进行改进,获得了很好的鲁棒性及隐蔽性.通过仿真试验也充分证明了这种算法的可行性和正确性.在版权保护、数据鉴别、数据检测、用户跟踪以及保密通讯等领域有着广泛的应用前景.

Research on digital watermarking algorithms methods of still 2D-image on the basis of small wave transform

On the basis of still 2D -image watermarking algorithms technology of small wave transform, a new kind of watermarking method is proposed, and depending on co - relation of small wave image coefficient of all layers, the watermark embedding is conducted. According to the designed results, by choosing original watermarking image with gray - level, colorful watermarking image in advance or improving calculation of emulating watermark of complicated structure, it has better effect of cropping and recessive ness is obtained. Emulating experiments have proved that the algorithm which proposed is correct and feasible in the field of copyright protection, data distinguish, data checks, user follow and secrecy communications.