计算机科学 ›› 2018, Vol. 45 ›› Issue (10): 178-182.doi: 10.11896／j.issn.1002-137X.2018.10.033
刘炜1,2, 程聪聪2, 裴孟丽2, 佘维1,2
LIU Wei1,2, CHENG Cong-cong2, PEI Meng-li2, SHE Wei1,2
摘要： 为了提高水印的鲁棒性,文中提出了一种基于子块分割的自适应全盲水印算法ABWASS。在嵌入水印时,该算法根据宿主特征矩阵嵌入自适应调整后的水印图像,并使用改进的两阶段DWT方法在LH2子带中融入水印图像的关键信息,从而得到含双重水印的图像;提取水印时,首先分离水印分块方式等关键信息,并通过DCT变换获得特征矩阵,进而提取水印图像。由于该方法在获得含有水印的图像时,根据宿主图像对水印进行了微调,并嵌入了原始水印尺寸,因此在提取过程可以实现全盲。实验结果表明,较已有方法,所提算法能够很好地抵抗多数常规攻击和几何攻击,并且在抵抗混合攻击上其性能均得到了提高,最大提升了2.7%;同时,其还具备较好的水印隐蔽性和实用性。
中图分类号:
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