Data from: An RGB color image steganography scheme using overlapping block based pixel value differencing

This paper presents a steganography scheme based on the RGB color cover image. The secret message bits are embedded into each color pixel sequentially by pixel value differencing (PVD) technique. The PVD basically works on two consecutive non overlapping components as a result the straight forward conventional PVD technique is not applicable to embed the secret message bits in a color pixel since a color pixel consists of three color components i.e. Red, Green and Blue respectively. So in the proposed scheme, initially three color components are represented into two overlapping blocks like the combination of Red and Green color components while another one is the combination of Green and Blue color components respectively. Later, the PVD technique is employed on each block independently to embed the secret data. Two overlapping blocks are readjusted to attain the modified three color components. The notion of overlapping blocks has improved the embedding capacity of the cover image. The scheme has been tested on a set of color images and satisfactory results have been achieved in terms of embedding capacity and upholding the acceptable visual quality of the stego-image.