Digital Image Watermarking using Fractional Fourier Transform with Different Attacks

In digital watermarking, a watermark is embedded into a cover image in such a way that the resulting watermarked signal is robust to certain distortion caused by either standard data processing in a friendly environment or malicious attacks in an unfriendly environment. This work provides Digital image watermarking based on Fractional Fourier transform and two dimensional fast Fourier transform (FFT2) with different malicious attacks (JPEG compression, Salt & peppers noise, Gaussian noise, Rotating ,Blurring, Halftoning attack by Jarvis method). Signal to noise ratio (SNR) is computed to measure image quality for each transform for better results comparatively previous techniques of information hiding. KEYWORDS-Digital Watermarking, Robust Watermarking, Copyright Protection, Fractional Fourier transform (FRFT), Fast Fourier Transform (FFT), Peak Signal to Noise Ratio (PSNR), attacks, Joint Photographic Group Expert (JPEG).