A Color Image Watermarking Scheme Employing the Features of Directive Contrast in the DWT-SVD Domain

With the massive expansion of image security for day to day purposes, image watermarking has become a critical factor regarding protection schemes. Here, we proposed a watermarking plan where we created a secondary image using directive contrast of the DWT (Discrete Wavelet Transform) subbands from the host image and used this secondary image for watermark embedding using DWT-SVD transformation. The horizontal subband was decomposed up to 2-levels during insertion of the watermark into the cover image to achieve better performance against noise attacks. The obtained results depict that our scheme can resist a number of signal processing attacks maintaining good perceptual quality with PSNR above 50 dB and NC more than 0.99. The evaluations of our process justify both of the imperceptibility to human visual system and robustness against noise attacks which are the prime aspects of image watermarking.