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Nowadays the compressed format files such as JPEG are used widely, but the existing compressed-domain fragile watermarking algorithms can not recognize whether the modification made to the watermarked image is on the image contents or the embedded watermark or both tampered by attackers. In this paper, a compressed-domain fragile watermarking scheme with discrimination of tampers on image content...
In this paper, we propose a novel robust audio watermarking scheme based on DCT (discrete cosine transform). The key point lies in the fact that centroid of each audio frame will not be changed much in order to maintain high auditory quality. Each audio segment carrying the centroid of one audio frame is performed with DCT. Then the direct-current component of each audio segment is embedded scrambled...
-With developing of computer networks and digital techniques, the electronic image are easily created, edited, reproduced and distributed. Unfortunately, illegal copy and malicious tamper are also facilitated. At present, fragile watermark is researched greatly to authenticate the veracity and integrity of electronic contents. In this paper, a chaotic watermarking scheme for authentication of popular...
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