Fast BCH Coding for Optimal Robust Image Watermarking in DCT Domain

This paper investigates a novel approach of digital image watermarking based on BCH error correction code in Discrete Cosine Transformation (DCT) domain. In the proposed technique, the watermark is encoded through BCH error correction code before embedding process, then it is embedded into the Discrete Cosine Transformation (DCT) coefficients of cover image. The proposed algorithm also employs lookup table method to find the best positions in the frequency domains for watermark insertion. The significant feature of this method is the reduction of time required in the process embedding of information, security and ability to correct the error caused by different attacks. Experimental results show the superiority of the proposed approach against the existing approaches.