摘要
给出了一种基于小波变换的半脆弱数字水印算法,采用二维离散小波变换,认证水印信息从低频子带中提取,对水印信息进行混沌映射调制。从实验结果可以看出,该算法提升了水印的安全性和保密性,对剪切拼贴篡改可进行详细的定位。
A semi fragile digital watermarking algorithm based on wavelet transform is presented, by using two-dimensional discrete wavelet transform, watermark the information from the low frequency sub-band extraction, chaotic mapping to modulate the watermark information. The experimental results show that this algorithm can improve the watermark security and confidentiality of collage can be tampered with shear localization.
出处
《数字技术与应用》
2017年第10期120-121,124,共3页
Digital Technology & Application
基金
宁夏高等学校科学技术研究资助项目(NGY2015184)
宁夏大学新华学院科学研究资助项目(16XHKY06)
关键词
图像认证
半脆弱水印
小波变换
image authentication
semi fragile watermarking
wavelet transform
