通过引入特征串的概念，算法较好的将空间域上常见的基于位修改和基于块均值的水印算法结合在一起。
The introduction of the concept of characteristic string, perfectly combines algorithms based on bit-change and algorithms based on block-mean.
采用值域块均值作为分形编码的参数可加快分形编码的速度，提高压缩比和加快分形图像压缩解码的收敛速度。
With the mean of range block, the compression ratio is improved, the coding time and reconstruction time are decreased.
该技术将水印嵌入到视觉不太敏感的蓝色通道中，通过调制图像子块均值在映射区间上的分布，构建新的图像稳定特征，并实现水印的嵌入和盲检测。
Through modulating the distribution of block average over a mapping range, a new stable image character is built, watermarks are embedded and blind-detect is implemented.
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