A blind spread spectrum wavelet based image watermarking algorithm

In this paper, A quantization based method for digital image watermarking is presented here. This method is based on inserting a watermark bit into the coarsest scale wavelet coefficients. A three level image decomposition is used in the paper. This watermarking technique is blind requiring neither the original image nor any side information in the watermark recovery process. It is computationally efficient. Experimental results show the superiority of the proposed watermarking techniques to the traditional wavelet based watermarking techniques.