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Based on the research of the current image information hiding theories, a type of image information hiding design based on DCT transform is presented. This program changes the DC coefficient of the DCT domain, ensures the right embedded secret information in the premise of non-visual distortion, through Amold transform establishes reference scrambling matrix, which enhances the robustness and security...
This paper presents an algorithm of digital watermark embedding in the middle frequency adaptively based on the DCT domain. According to the energy of the block size after transforming, the algorithm can select the middle frequency coefficient adaptively to do embedding operation. Compared with traditional DCT domain fixed-point algorithm, it reachs a better balance of robust and watermark information...
Digital watermarks provide the capability to add extra information to various media, such as still images, movies and audio, by utilizing features of its content. Several methods for printed document have already been proposed using features of the text or images. In this paper we treat the paper media itself as content and propose a new information hiding methodology which utilizes the fiber pattern...
The causation that why the capacity of information hiding algorithm based on DCT domain is small is analyzed, a large capacity blind information hiding algorithm based on DCT domain is proposed. First, uniform spectrum processing act on the carrier image, then the image is processed globe DCT transform. Finally, the information, which is to be hidden, is embedded into the low frequency coefficients...
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