摘要
分析了一种小波域数字水印算法,利用人类视觉模型对算法进行了改进。选取一幅有实际意义的二值图像作为水印,在对原始图像进行多级小波分解后,通过修改中频系数来进行水印嵌入。实验证明嵌入水印后的图像具有更好的隐蔽性,并且对JPEG压缩、图像添加高斯噪声、中值滤波等图像处理操作具有很强的鲁棒性。
This paper analyzes a digital watermark in wavelel domain and improves it with the human visual model. The watermark is a meaningtul hinary image, 11 selects the wavelet coefficients based on HVS, and then the coefficients is modified to embed the watermark. It is improved that the processed image has better lransparency, robustness to JPEG compression, additive noise and filler etc.
出处
《计算机工程》
EI
CAS
CSCD
北大核心
2006年第24期138-140,143,共4页
Computer Engineering
关键词
数字水印
人类视觉系统
离散小波变换
Digital watermark
Human visual system
Discrete wavelet transform
