Reversible Visible Watermark Technique in Dct Compressed Domain

Many watermark algorithms were proposed for protecting digital media from unauthorized use. Visible watermark scheme indicates the copyright of a digital media by embedding an inconspicuous but recognizable pattern into the media. However, the embedding process often results in serious distortion in the protected content, and the embedding process is not reversible. This paper proposes a reversible visible watermarking method for JPEG compressed image. A contrast adaptive strategy is proposed to maintain both transparency and recognizable sign. This method can also guarantee complete restoration and global protection. Experimental results show that the proposed method outperforms related methods in terms of quality preservation of the reconstructed image.