A Multiple Robust Digital Watermarking System for Still Images

Fast and wide-scale spreading of the image data on the Internet creates great opportunities for illegal access by different intruder kinds. In order to solve the problem of intellectual property protection, digital image watermarking can successfully be used. We extend the previously proposed method of digital 0-bit watermarking based on the embedding of the local maxima into the Fourier transform area of the image to multiple watermarking. Simulation results are provided confirming that the proposed method is resistant to cyclic shifts, row and column removal, cropping, addition of noise and JPEG transforms.