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The experiment results show that watermarking algorithms based on block SVD are very robust to usual image manipulation attacks, especially the quantization watermarking algorithm.
实验结果证明，基于块奇异值分解的水印算法对常规的图像处理攻击具有很好的鲁棒性，尤其是其中的量化水印算法。
According to the characteristics of integer discrete cosine transformation(DCT) and quantization, the coefficient-all-zero block was determined in advance to terminate meaningless search.
根据整数DCT变换和量化的特性，通过提前判定全零系数块来终止没有意义的运动搜索过程。
This method is based on the techniques of block truncation coding and vector quantization.
该方法是以分块截断编码技术和矢量量化技术为基础的编码方法。
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