Dual Image Reversible Data Hiding by Modifying Least-Significant-Bit Matching Revisited Rules

The concept of dual image reversible data hiding (DIRDH) is the technique that can produce two camouflage images after embedding secret data into one original image. Moreover, not only can the secret data be extracted from two camouflage images but also the original image can be recovered. To achieve high image quality, Lu et al .’s method applied least-significant-bit (LSB) matching revisited to DIRDH. In order to further improve the image quality, the proposed method modifies LSB matching revisited rules and applies them to DIRDH. According to the experimental results, the image quality of the proposed method is better than that of Lu et al .’s method.