It would be one of the unremitting research works to seek watermarking methods for halftoned images that could resist as many attack algorithms as possible.
寻找对尽可能多的攻击算法有免疫性的半色调图像的数字水印方法将持续成为研究的主要方向之一。
Currently, there are many DWT (Discrete wavelet Transform) based watermarking algorithms, but few of them discuss the issue in association with fractal image coding in wavelet domain.
目前有很多基于离散小波变换(DWT)的水印算法，但结合分形编码技术的很少。
This paper discusses some basic characters of asymmetric watermark, and review some asymmetric watermarking algorithms and asymmetric watermarking protocols.
文章分析了非对称水印的基本特征，并对一些非对称方案，包括非对称水印算法和非对称水印协议进行了讨论。
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