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Semi-fragile watermarking which is robust to given operations and fragile to conscious operations, is a useful authentication technique for digital media. In this paper, a novel semi-fragile image watermarking algorithm that accepts JPEG compression and gray-scale-transformation is proposed. In the proposed algorithm, the properties of JPEG compression, DCT coefficients and gray-scale-transformation...
As a new authentication technique for digital information, semi-fragile watermarking has gained great development, and since JPEG compression is one of the usually used image processing methods, more and more semi-fragile watermarking algorithms based on JPEG compression standard are proposed, but how to make full use of the properties of JPEG compression is still a problem. In this paper, the theory...
A new fragile blind watermarking algorithm for content authentication is proposed in this paper. Firstly, the program (cover work) is divided into segments according to the three basic program control structures (sequence, branch and loop). Secondly, the frangibility of watermark is used to mark the variation of the code line, which achieved through using a hash function and generalized character...
Semi-fragile watermarking technique which aims to discriminate malicious manipulations from admissible manipulations, is drawing many attentions in image authentication. In this paper, a novel semi-fragile image watermarking algorithm that accepts Laplacian sharpening is proposed. In the proposed algorithm, based on the theory of Laplacian sharpening, the watermark is embedded in the space domain...
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