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This paper presents a digital watermarking algorithm supporting large-size image, the amount of information embedded is based on the characteristics of the host image and the watermarking image. We use pseudo-random encoder to determine the location of embedding information and the watermarking. The method of processing the embedded information and carrier information is discrete cosine transform...
This paper presents a robust better gray image watermarking algorithm based on the distance in the wavelet transform domain. Firstly, two images will be pretreated: the vector image is transformed into discrete wavelet domain, the level of transform is decided by the size of the watermark image, another pretreatment is that watermark image is scrambled by Arnold transform; Secondly, the edge information...
In this paper, a novel blind digital watermarking algorithm using wavelet-packet decomposition is proposed. Firstly, the original image is transformed into frequency domain with wavelet-packet decomposition by using a key that decides which direction will be further transformed, so that the sub bands where watermark is embedded are determined. Secondly, the binary watermark image with copyright information...
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