Digital image watermarking based on canny edge detection and texture block in DWT

A new digital image watermarking algorithmbased on texture block and canny edge detection in thediscrete wavelet domain is proposed in order to balancebetween the invisibility and robustness and improve theability of resisting to geometric attacks of the digital imagewatermark. In the algorithm, the texture blocks are extractedafter the edge detection for the original image with thecanny operator by using the masking property of humanvisual system, in which the watermark is embeddedadaptively both in the low-frequency sub-band and the highfrequencysub-band in the discrete wavelet domain. Theexperiment result shows the watermark has good invisibilityand robustness as well as the ability of resisting to geometricattacks by using the algorithm proposed in this paper. At thesame time three keys generated in the embedding processthat can raise the security of the watermark.Rapid evolution of digital technology has improved the easeof access to digital information enabling reliable, faster andefficient storage, transfer and processing of digital data. Italso leads to the consequence of making the illegalproduction and redistribution of digital media easy andundetectable. Hence, the risk of copyright violation ofmultimedia data has increased due to the enormous growthof computer networks that provides fast and error freetransmission of any unauthorized duplicate and possiblymanipulated copy of multimedia information. Apreprocessing step before the watermark extraction has beenproposed which makes the algorithm resilient to geometricattack i.e. RST attack. Performance of this watermarkingscheme has been analyzed by evaluating the robustness ofthe algorithm against geometric attack including rotation,scaling, translation (RST) and some other attacks.Experimental results have been compared with existingalgorithm which seems to be promisin