摘要
数字水印的隐蔽性和鲁棒性通常是矛盾的。在中、高频域嵌入水印,虽然能保证良好的隐蔽性,但鲁棒性很脆弱。论文探讨了一种图像低频区域的数字水印方法,在增强水印鲁棒性的同时,尽可能地提高隐蔽性。文中对该方法用Stirmark软件进行了攻击检验,通过与经典DCT方法的比较,取得了预期的效果。
There is opposite between the imperceptibility and robustness in digital watermarking. As for embedding digital mark in image, we choose commonly middle or high frequency region, which can promise good Imperceptibility, but its robustness is fragile. In this paper, a method based on DCT in image＇s low frequency is proposed, which can provide more robustness while the imperceptibility is maintained. By using the Stirmark software to simulate the attack and compared with classical DCT algorithms, this method have proved itself to be efficient.
出处
《信息安全与通信保密》
2007年第3期85-86,共2页
Information Security and Communications Privacy
关键词
数字水印
图像
低频
DCT
鲁棒性
digital watermarking
image
low frequency
DCT
robustness
