Application of binary image authentication algorithm in digital watermarking

Abstract

A novel fragile watermarking scheme is proposed using a hierarchical mechanism, in which the embedded watermark data are derived both from pixels and blocks. On the receiver side, one can first identify the blocks containing the tampered content, and then use the watermark hidden in the rest blocks to exactly locate the tampered pixels. By combining the advantages of both block-wise and pixel-wise techniques, the proposed scheme is capable of finding the detailed tampered positions even if the modified area is more extensive. Moreover, after localizing the tampered-pixel, the original watermarked version can be perfectly restored using. Experimental results show that the watermark can be blindly extracted, the proposed method can detect any modification to the watermarked image, and verify the ownership while the watermarked image is not manipulated. © 2013 Springer-Verlag.