基于数据隐藏的可逆图像视觉变换算法

Reversible image visual transformation algorithm based on data hiding

提出了一种新的基于可逆数据隐藏的图像加密算法,解决了已有算法过程复杂、信息嵌入量大、还原原始图像时产生失真等问题。利用图像中像素值最高位(MSB)对灰度影响最大的特点,将秘密图像的MSB位平面替换为事先选定的参考图像的MSB位平面,以掩饰秘密图像的视觉内容。提出的算法需要保存恢复原始图像所需的信息,采用基于直方图变换的可逆数据隐藏算法嵌入图像视觉变换信息,可以提高信息嵌入容量,并能根据提取的信息无损地还原出原始图像。

A new image encryption algorithm based on reversible data hiding technique is proposed,which solves the problems of complex process,large amount of embedded information of existed algorithm and distortion when original image is restored. Take advantage of the pixel value most significant bit（ MSB） has the greatest influence on gray level replace the MSB bitplane of secret image to MSB bitplane of reference image which is previously selected,in order to conceal visual content of the secret image. This algorithm adopts a reversible data hiding algorithm based on histogram transformation to embed the information of image visual transformation,so that the capacity of data embedding is improved. Furthermore,the original image can be exactly recovered by the extracted information.