基于整数小波直方图间隙的无损数据隐藏

在整数小波和直方图调整技术的基础上，提出了小波直方图间隙的方法。将数据嵌入到小波的高频子带系数中，符合人的视觉系统。通过迭代在小波系数直方图中不断形成间隙的方法，将数据嵌入到间隙中去，而直方图调整技术则解决了该方法的溢出问题。实验表明该方法在相同的视觉效果下比其他方法能获得更高的嵌入容量，在相同的嵌入容量时能维持更好的视觉效果。

Reversible data hiding by histogram gap method based on integer wavelets

A histogram gap method for image lossless data hiding based on integer wavelet transform and histogram modification was proposed.The data was hidden into wavelet coefficients of high frequency subbands,which conformed to the human vision system.Then the data was embedded into the gap by iteratively generating gaps in wavelet coefficient histogram,and the histogram modification technique was used to prevent overflow.Experimental results demonstrate the superiority of the proposed method over the existing methods.That is,the proposed method has a larger embedding capacity(payload) in the same visual quality(PSNR) or has better visual quality in the same capacity.