Another method is an auto-adaptive dual-watermarking algorithm based on wavelet-block.
第二种算法是基于小波系数块的自适应双重水印算法。
参考来源 - 基于人类视觉系统的小波域自适应图像水印算法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In this paper, a dual color image watermarking algorithm is proposed based on the research of color digital watermark.
本文对彩色水印技术进行了详细地研究，提出了一种双彩色数字水印方案。
Study of digital audio watermarking is less than that of image recently, and dual watermarking is much less.
而近年来对音频水印的研究远远少于图像水印，双水印的研究则更加少。
The third method is effective integrate the former two algorithms, which proposed dual watermarking algorithm for digital image authentication.
第三种算法是将前两种空域和变换域算法进行有效融合，从而提出了双重多功能性水印数字图像认证算法。
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