一种基于矢量量化的数字图像水印技术❋

摘要

基于矢量量化的数字水印技术，在矢量压缩编码过程中，在被保护的图像中嵌入了一种典型的数字水印，水印可以从图像中恢复出来，从而可以在版权争议中有效地为版权方举证。矢量量化密语本中的密语根据不同的特征被定义成不同的组，进而将每个二进制水印比特都嵌入到选定的矢量量化编码块中，特点是水印同时存在于矢量量化压缩图像和矢量量化解码后的重建图像中。因为水印隐藏于压缩图像之中，加入水印的压缩图像具有尺寸小、传递速度快并且存储空间在压缩时可保存的特点，因而代替了原件在因特网上传输。此外，重建的图像具有鲁棒性来防范破坏或消除水印的企图。%Based on digital watermarking technique of vector quantization,in vector coding process,in the protected im-age in a typical digital watermark is embedded,the watermark can be recovered from the image,which can effectively in a copyright dispute for copyright proof.Whisper of vector quantization in the according to the different characteristics are de-fined into different groups,then each binary watermark bits are embedded into the selected vector quantization coding block, which is characterized in that the watermark also exist in the vector quantization compression image and vector quantization decoding of reconstruction image.Because the watermark is hidden in the compressed image,the compression image with the watermark has the characteristics of small size,fast transmission speed and the storage space can be saved in the compres-sion,thus replacing the original transmission on the internet.In addition,the reconstructed image is robust to prevent dam-age or remove the watermark.