COPYRIGHT PROTECTION OF 3D ANAGLYPH COLOR IMAGE WATERMARKING OVER THIN MOBILE DEVICES
The exponential development in mobile devices and the internet makes the creation of digital content easier. Hence, digital content protection is essential for 3D content, especially for anaglyph images. The 3D anaglyph images are cheaper and easier to create from the stereoscopic images. Therefore, this article proposes copyright protection for 3D anaglyph color images using DWT-HD-SVD without converting the cover image into grayscale or YCbCr. Initially, the stereoscopic image consists of the left and right views that produce the different types of 3D anaglyph images. In this work, the cover image is a true and red-cyan color image, the owner’s secret information as a watermark logo of color and half-color 3D anaglyph images. Then, extract the blue channel from the cover image, and applies the discrete wavelet transformation (DWT), and Hessenberg decomposition (HD) on the LL sub-band. After that, apply the Singular Value Decomposition (SVD) on the upper Hessenberg matrix. Similarly, extract the blue channel from the watermark logo and apply the SVD on the LL sub-band. Further, the embedded scaling factor is optimized using Particle Swarm Optimization (PSO), then performs the embedded and extraction operations for various watermark sizes. The proposed approach measures the performance using MSE, PSNR, SSIM, and NCC for various attacks. Hence, the experiment results show that invisibility and robustness are enhanced over the existing approach.