摘要
提出了基于整数小波阈值嵌入的无损数据隐藏方法。在图像的小波子带系数的最低位(LSB)嵌入隐藏数据,将数据嵌入到小波CDF(2,2)的高频子带系数中,符合人的视觉系统原理(HVS)。并使用直方图调整的方法防止溢出。小波阈值嵌入利用阈值T控制小波系数在最低位是否插入隐藏数据。该方法嵌入数据容量大(相同PSNR),PNSR高(相同容量)。通过对CorelDraw图像库1096幅图像测试,证明了提出的方法是有效的。
A new lossless data hiding method for digital images using integer wavelet transform and threshold embedding technique was proposed. Data were embedded into the Least Significant Bit-plane （LSB） of high frequency CDF （2, 2） integer wavelet coefficients, which accorded with the principle of Human Visual System （HVS）. Histogram modification was applied as a preprocessing to prevent overflow/underflow. Whether the data should be embedded into the coefficient or not was determined by a predefined threshold. Experimental results show that this scheme outperforms the prior arts in terms of a larger payload （ at the same PSNR） or a higher PSNR （ at the same payload）. The method is successfully applied onto the CorelDraw which contains 1 096 images in all.
出处
《计算机应用》
CSCD
北大核心
2006年第12期2890-2893,共4页
journal of Computer Applications
基金
国家自然科学基金资助项目(90304017)
关键词
整数小波变换
大容量数据图像隐藏
直方图调整
小波系数预处理
integer wavelet transform
high capacity lossless data hiding
histogram modification
wavelet coefficients preprocessing
