基于矢量量化的数字图像水印技术研究

基于矢量量化的数字水印是数字水印技术一个新的研究领域。主要研究基于矢量量化的数字图像水印技术的原理和性能。在简要介绍水印技术和矢量量化技术后阐述了基于矢量量化的数字水印算法的基本原理。通过分析几种典型的矢量量化水印算法，总结出基于矢量量化水印算法的特点是其在嵌入容量和算法易行性方面有绝对优势，并且对于VQ压缩攻击有很好的鲁棒性，但水印图像的质量对于版权保护来说还有待提高。指出进一步研究的方向是结合DCT、DWT、HVS来改善。

Research on VQ-Based Digital Image Watermarking

Vector quantization(VQ)-based digital watermarking technique plays a newly developed branch in digital watermarking research fields recently.Mainly researched on the VQ-based digital image watermarking technology.After briefly introducing watermarking technology and vector quantization,the principle of VQ-based digital watermarking technique is explicated.By analyzing several typical VQ-based digital image watermarking algorithms,the characteristic of VQ-based digital image watermarking algorithms is summed up.It is superior in the capability and embedded facility and has a very good robustness against VQ compression,but the watermark image quality needs to be enhanced.Further research is to combine it with the DCT,DWT and HVS to improve the imperceptibility.