A reversible modified least significant bit (LSB) matching revisited method

Abstract

Least Significant Bit (LSB) matching revisited method is a modification to the LSB matching, which is a data hiding method for embedding message bits into a cover image. The modified method achieves the same hiding payload as LSB matching, but with fewer changes to the cover image. According to the embedding algorithm, we found that the LSB matching revisited method can be viewed as a kind of Exploiting Modification Direction (EMD) method. By using the modified LSB matching method and EMD, a simple dual images Reversible Data Hiding (RDH) method is proposed. The experimental results show that the proposed method achieves better image quality and hiding capacity. The image quality is evaluated using Peak Signal Noise Ratio (PSNR) and Structural Similarity Index (SSIM). Moreover, Regular and Singular (RS) analysis reveals that the proposed method is secure against Steganalysis.