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In the watermarking algorithm of the medical image, the principal problems faced are how to determine the region of interest (ROI) and improve the hiding capacity. This paper proposes a robust multiple watermarks algorithm for the medical image based on DWT and DCT, which can effectively solve the referred problems. The algorithm combines the visual feature vector of images, encryption technology...
A new image watermarking based on the support vector regression (SVR) and human visual system (HVS) is proposed in this paper. According to the discrete cosine transform (DCT) suggested a new watermarking algorithm, human visual system is used to find the suitable strength where the watermark should be embedded and support vector regression is used to simulate human visual system to achieve maximum...
We propose a unidirectional communication system capable of pushing information from audio speakers to nearby audience via acoustic channels. Though constrained by short transmission distances and low data throughput of sound waves, information push services based on acoustic channels can be regarded as a cost-free message delivery scheme since music playback systems and handheld devices equipped...
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