摘要
数字图像水印是隐藏在图像中的数字信息 ,可以起到版权保护和所有权认证作用 .多重图像水印就是在一幅图像中嵌入和检出多个不相关水印的技术 .利用基于 m序列的扩频技术实现了一种数字图像空间域的多重水印算法 .根据 m序列的伪随机特性和抗干扰性能 ,使水印具有良好的隐蔽性和稳健性 .水印的检测不需要原始图像的参与 ,可以根据不同的 m序列有选择性地恢复不同的水印标记 ,并且能够抵御强随机噪声以及 1 0 %以上
Digital image watermark is a piece of digital information hidden in an image, which can be used for copyright protection and ownership authentication. Multiple image watermarking is a technology to embed and detect multiple irrelevant watermarks in a single digital image. A kind of multiple digital image watermark embedding and detecting algorithm in spatial domain was realized by use of spread spectrum technology based on m sequence. Due to the pseudorandom characteristic and anti-jamming capability of m sequences, the embedded watermarks are featured with good property of invisibility and robustness. It is possible to selectively recover the different watermark logos by the corresponding m sequence without the reference to the original image. The algorithm can resist the interference of heavy pseudorandom noises and JEPG lossy compression with more than 10% ratio.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第9期1317-1320,共4页
Journal of Shanghai Jiaotong University
