On digital watermarks based on complete complementary codes
On digital watermarks based on complete complementary codes
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DOI：
10.1109/iwsda.2009.5346410
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发表时间：
2009-12
期刊：
影响因子：
--
通讯作者：
Y. Horii;T. Kojima
中科院分区：
文献类型：
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作者：
Y. Horii;T. Kojima
先前已经提出了使用扩频(SS)序列的数字水印技术。然而，在以前的研究中使用的序列不一定具有良好的相关特性。众所周知，完全互补码具有理想的相关特性，在像码分多址这样的移动通信系统中非常有效。研究表明，序列的相关特性在检测水印图像中嵌入的秘密信息中起着非常重要的作用。此外，我们还提出了一种将多个秘密数据同时嵌入到一幅图像中的方法。
Digital watermarking technologies with spread spectrum (SS) sequences have been previously proposed. The sequences used in previous studies, however, do not necessarily have good correlation properties. It is known that complete complementary codes have ideal correlation properties and very effective for mobile communication systems like CDMA. In this paper, it is shown that correlation properties of sequences play very important roles in detecting the embedded secret information from the watermarked images. In addition, we propose a method to embed multiple secret data simultaneously into a single image.