摘要
对在频域中使用最不显著分量(LSB)算法进行了分析,提出了增强LSB算法鲁棒性的条件和频域LSB的两种定义,并据其构造了具有鲁棒性的LSB算法。为保证水印顽健性,对图像做8×8分块,把各个块的中、低频部分的LSB部分用水印代替,水印的平均强度为被取代部分平均强度的20倍。仿真实验证明:算法在一定条件下,可以具有相当强的鲁棒性。同时,可以提供攻击的合法性辨别和攻击位置确定,并在两个位置提供认证接口,符合水印发展趋势。
Under the analysis of LSB arithmetic in frequency domain, this paper presents the situations for enhancing robustness of LSB arithmetic and two definitions for LSB in frequency domain. Based on the first definition, this paper constructs a LSB arithmetic with robust. The original image is disparted into 8×8 blocks, and the LSB of middle and low frequency is displaced with the watermark with the 20 times intension of the replaced part＇s. The experiments prove that the arithmetic has strong robustness under the given situations.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2006年第5期770-773,共4页
Journal of University of Electronic Science and Technology of China
