基于非对称直方图修改的可逆信息隐藏方案

Reversible data hiding scheme based on asymmetric histogram modification

改进了一种可逆信息隐藏方案,利用2种不同的预测方法计算原始图像的预测误差,生成2个不对称的预测误差分布直方图,在进行秘密信息的嵌入时分别对2个不对称的预测误差分布直方图采取相反方向的平移方式。与传统方案相比,改进的方案可以更好地发挥互补嵌入策略的优点,使尽可能多的像素点发生像素值补偿现象,进一步保护了含密图像的质量。

A reversible data hiding scheme was improved, using two different forecast methods to calculate the prediction error of the original image, two asymmetric prediction error distribution histogram generated, when making secret information embedded respectively on two asymmetric prediction error distribution histogram in the opposite direction of translation ways. Compared with the traditional scheme, the improved scheme can play better to the complementary advantages of embedding strategy, make as many pixels pixel values compensation occur, further protecting the secret image quality.