Reversible Data Hiding Using Controlled Contrast Enhancement and Integer Wavelet Transform

Reversible Data Hiding Using Controlled Contrast Enhancement and Integer Wavelet Transform

Abstract— Reversible Data Hiding Using Controlled Contrast Enhancement and Integer Wavelet Transform. The conventional reversible data hiding < Final Year Projects 2016 > RDH. al-gorithms pursue high Peak-Signal-to-Noise-Ratio (PSNR) at the certain amount of embedding bits. Recently, Wu et al .deemed that the improvement of image visual quality is more important than keeping high PS NR. Based on this viewpoint, they pre-sented a novel RDH scheme, utilizing contrast enhancement to replace the PSNR. However, when a large number of bits are embedded, image contrast is over-enhanced, which introduces obvious distortion for human visual perception.Motivated by this issue, a new RDH scheme is proposed using the controlled contrast enhancement (CCE) and Haar integer wavelet transform (IWT). The proposed scheme has large embedding capacity while maintaining satisfactory visual perception. Experimental results have demon strated the effectiveness of the proposed scheme.