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Since existing watermarking schemes usually have only a single function, a region-adaptive semi-fragile dual watermarking scheme is proposed, taking into account both watermark embedding capacity and security. The dual watermarks refer to the robust ...

In this paper, a novel steganographic method based on joint photographic expert-group (JPEG) is proposed. The proposed method modifies the quantization table first. Next, the secret message is hidden in the cover-image with its middle-frequency of the ...

Digital watermarking technology is primarily the joining of the rightful owner of the protected media. Once the media are suspected to be illegally used, an open algorithm can be used to extract the digital watermark for the purpose of showing the media'...