An Undistorted Spread Spectrum Robust Watermarking Design in DWT
WU Ke-shou · Computer Engineering and Science · 2009
This paper proposes an undistorted spread spectrum robust watermarking scheme.In this scheme,a method of feature watermarking is proposed,which is a binary sequence,and is the result of quantifying the coefficients in DWT by the quantization function.Since the scheme is content-based,and we do not embed any information into the watermarked image,the IDWT is so not necessary,and then the scheme is undistorted.The performance of the scheme is determined mainly by the quantization coefficient,rather than the amount of information embedded in the traditional watermarking schemes.