Abstract: This paper proposes a novel digital watermarking scheme based on fuzzy theory to adapt the embedding strength of the watermark according to the spatial feature of the host image in wavelet domain. The method eliminates the dividing lines among image blocks with different classes, so that the quality of watermarked image is improved. Experimental results show that the proposed techniques can survive various attacks and make watermark more imperceptive compared with other algorithms based on image classification

Key words: Digital watermarking; Image classification; Fuzzy system; Entropy; Standard deviation; Robustness

摘要： 提出了一种新的基于模糊理论的小波域鲁棒性水印算法，该算法利用模糊系统消除了图像块分类算法中异类块间易出现的边界，进而提高了水印载体图像的视觉质量。实验结果表明，与基于图像块分类的算法相比，该算法在保持良好鲁棒性的同时，进一步增强了水印的透明性

关键词: 数字水印；图像块分类；模糊系统；熵；标准差；鲁棒性