Digital Information Hiding Techniques

Abstract

Information hiding, a form of watermark, embeds data into digital media for the purpose of identification and copyright. Several constraints affect this process: the size of data to be hidden, the need for robustness of these data under conditions where a host_signal is subject to distortions, for e.g., lossy_compression, and the degree to which the data must be immune to interception, modification, or removal by a third person. Here, we explore two techniques (DC watermarking scheme and Time Domain watermarking technique) for addressing the data-hiding process and evaluate these techniques in light of the copyright protection application. The measures (SNR, PSNR, NRMSE) were used to improve the results. Besides that the Matlab were used as a programming language in this paper.

Keywords

• dc level shifting
• snr
• dct coefficients