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一种自适应图像灰度水印算法 被引量：3

A Gray-Scale Watermarking Algorithm of Adaptive Digital Images
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摘要 提出了一种改进的SPIHT压缩算法,用于灰度水印的预处理,以得到易于嵌入的二进制数据.并将水印自适应地嵌入图像的低频小波系数,使得嵌入水印能量不超过图像可容纳的噪声上限.实验表明,算法能增强水印的鲁棒性,同时不会明显降低其视觉效果,且提取出的水印易于直观判断. An improved SPIHT compression algorithm for the pretreatment of gray-level watermarks is presented to get the binary system＇s data which can be easily embedded. The watermark is self-adaptively embedded into the low frequency wavelet coefficient of image, so that the embedded watermark energy will not exceed the top limit of the acceptable noise of the image. Experiments demonstrate that the watermark＇s robustness has been enhanced, the conflict between invisibility and robustness has been miti gated, and the drawn watermark can be intuitively recognized.
作者 彭静 侯祥勇 马燕
机构地区 重庆师范大学物理学与信息技术学院
出处 《西南大学学报（自然科学版）》 CAS CSCD 北大核心 2009年第7期171-175,共5页 Journal of Southwest University(Natural Science Edition)
关键词 水印算法 图像灰度 自适应 SPIHT 嵌入水印 压缩算法 灰度水印 二进制数据 gray-scale watermark wavelet transform SPIHT compression adaptive-algorithm
分类号 TP391.41 [自动化与计算机技术—计算机应用技术] TP273.2 [自动化与计算机技术—检测技术与自动化装置]
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参考文献5

二级参考文献39

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共引文献260

同被引文献23

  • 1刘晓宁,周明全,耿国华,樊亚春.三维几何模型数字水印综述[J].计算机应用与软件,2007,24(6):14-16. 被引量：6
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引证文献3

二级引证文献5

西南大学学报（自然科学版）
2009年 第7期

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