Novel Color Image Data Hiding Technique Based on DCT and Compressed Sensing Algorithm

Abstract

Information security and its research are getting significant, and therefore, the steganographic technique is used in high level to send data secretly using a cover image such that its presence cannot be detected. In his paper, an improved RGB image steganographic technique which is a novel approach for hiding the secret image based on compressive sensing algorithm has been proposed. In the proposed approach, the RGB planes of payload image are extracted and compressed; then, the coefficients are reshaped and discrete cosine transform (DCT) is applied over 2 * 2 matrices. The compressed payload image is embedded with chaotically chosen random keys in the segmented RGB planes of cover image. The proposed method results in significant improvements with high PSNR value and payload capacity.