一种大嵌入容量的可逆数据隐藏方法

Reversible data hiding method with large embedded capacity

为了提高可逆数据隐藏容量,定义了一种新的基于n维图像块向量的可逆整数变换算法,整数变换后图像块所有像素最低两位有效位相同,产生了较大的冗余信息,可用来实现较大容量的可逆数据隐藏。将该方法与现有的一些方法进行了实验比较,结果表明该方法在嵌入相同数据量时具有更好的隐蔽性,并且还提高了最大数据嵌入量。该方法具有较好的隐蔽性和较大的数据嵌入容量,嵌入数据和原宿主图像均能从隐藏图像无损恢复。

In order to improve reversible data hiding capacity, this paper defined a new reversible integer transform based on image block vector of n dimension, after transformed by the proposed integer transform, the two least significant bits of all the pixels＇ values in the image block were equal, and produced lager redundancy information, which could be used to realize re- versible data hiding with larger embedded capacity. It compared the method with other existing schemes by simulated experi- ment, the experimental results showed that the proposed method achieves better visual quality with the same embedded capaci- ty, and improved the maximal embedded capacity. Proposed method has larger embeded capacity and better visual quality, both the original host image and the embedded data can be restored without any distortion from the hidden image.