Minimization of effect of various attacks on watermarked images using fuzzy logic approach

Design of robust and imperceptible digital watermarks has great importance now days. Watermarked images are affected by various attacks such as cropping, salt & pepper noise and rotation. These attacks destroy the inserted watermark, so that the copyright problem may arise. The effect of these attacks can be reduced by properly inserting the watermark with effective algorithm. In this paper, a blind robust watermarking algorithm using Dynamic Fuzzy Inference System is developed in wavelet Transform domain. The proposed algorithm is robust to cropping, salt & pepper noise and rotation attacks compared to other algorithms.