摘要
近几年随着计算机和网络的发展,数字水印技术越来越受到重视,而水印信息的预处理可提高水印的鲁棒性等特性,本文主要先介绍了m序列,扩频处理,Arnold图像置乱,并分别对扩频处理和图像置乱进行了改进,使得扩频后的数据更加具有随机性,置乱空间密钥更大,安全性更好,并对扩频技术和图像置乱技术进行了比较,得出结论扩频技术使用范围更广,随机性更好,更好的提高了水印信息的鲁棒性。
The watermark pre-processing can improve the robustness and other characteristics.The paper introduces the m-sequence,spread-spectrum processing,Arnold Images scrambling,and improves the spread-spectrum processing and image scramble.The improvement makes the data more random,and the space of secret key larger and more security.The paper compares the spread spectrum technology and image scrambling technologies,and concludes that the spread spectrum technology has wider range of application,better randomness,and it improves the watermark robustness.
出处
《北京电子科技学院学报》
2009年第4期16-24,共9页
Journal of Beijing Electronic Science And Technology Institute
关键词
数字水印
扩频
M序列
图像置乱
digital watermarking
spread spectrum
m-sequence
image scrambling
