基于LSB和多重秘密共享的二值图像隐藏方案

BINARY IMAGE HIDING SCHEME BASED ON LSB AND MULTI-SECRET SHARING

提出一种新的二值图像隐藏方案,将一幅秘密二值图像隐藏在多幅公开载体图像中,实现对秘密二值图像的保护。针对二值图像取值形式为二值的特点,该方案第一次把变长游程编码算法、多重秘密共享思想和LSB算法糅合在一起,并根据载体图像的最大隐藏信息量把秘密图像的游程长度序列分成n块,由n个密钥控制分别隐藏在n幅公开载体图像中。实验表明,该算法在不明显引入修改痕迹的情况下,可显著提高峰值信噪比和安全性,且算法简单易行。

A new binary image hiding scheme is proposed,which hides a secret binary image into a couple of overt carrier images to achieve the protection of secret binary image.Aiming at the characteristic of the binary image whose valuing form is the binary value,the scheme combines the multi-secret sharing idea with run-length encoding algorithm and LSB algorithm for the first time.Moreover,according to the biggest size of hidden information of the carrier image,the scheme divides the run-length sequence of the secret image into n blocks,and then embeds them into n blocks of overt carrier images respectively under the control of n keys.Experiment demonstrates that this scheme can sufficiently improve the PSNR and the security in the condition of inconspicuous introduction of modification trace,and is simple and easy to use.