A secure watermarking for JPEG-2000

We propose a discrete wavelet transform (DWT) based watermarking method, which can be conveniently integrated in the forthcoming JPEG-2000 baseline. Conventional DWT-based watermarking techniques insert a watermark into the coefficients after the transform is completed, while the proposed method inserts a watermark into the coefficients obtained from the ongoing process of lifting for DWT. The proposed method allows us to determine selectively frequency characteristics of the coefficients where the watermark is embedded, so that the watermark cannot be easily removed or altered even when filter-banks for DWT are known. Through simulations, we show that the proposed method is more secure and more robust against various attacks than the conventional DWT-based watermarking