摘要
提出了一种在分块DCT的次低频交流系数中,利用奇偶特性和JPEG量化系数嵌入有含义的8位灰度水印图像,以实现盲提取的算法,并通过PN序列加密来保证水印的安全性。实验结果表明,该算法对于JPEG有损压缩、图像剪切等处理有很强的鲁棒性。
This paper proposes a meaningful 8-bit grayscale watermarking image embedding algorithm through using even-uneven identity and JPEG quantifying coefficients based on block Discrete Cosine Transform(DCT) hypo-low frequency AC coefficient. The cover image is not needed when extracting the watermarking data. And PN series is used to ensure watermarking security. The experiment results show that the algorithm has better robustness on JPEG and image cut.
出处
《计算机应用研究》
CSCD
北大核心
2005年第7期165-166,198,共3页
Application Research of Computers
基金
河南省杰出青年基金资助项目(0412000400)
国家教育部科研基金重点项目(200305)
