Abstract
Khushi Yadav, Sunil Joshi, Navneet Agrawal
Optimized, Robust and Secure Digital Image Watermarking technique based on Modified Periodic and Smooth Decomposition is proposed. This proposed technique based on Periodic and Smooth Decomposition (PPSD), Discrete Wavelet Transform (DWT) and Singular Value Decomposition (SVD). The host and watermark image is decomposed into a smooth and periodic component. The smooth component decomposed into its frequency sub-bands through 2nd level DWT. Later by SVD, the watermark singular matrix is combined with the singular matrix of the transformed image. The watermarked image has been obtained by using the inverse of DWT. Through the proposed technique we improved the different parameters like PSNR is 92.9075, SSIM watermarked 0.8039, SSIM extracted watermark 0.9924, NCC 0.9929. The experimental result displays that the proposed technique is imperceptible and robust to different attacks. By using SVD we faced false positive problem but we solved this problem by adopting a digital signature. Digital signature gives authentication before extracting watermark image.
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