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In this paper, a novel image coding scheme using rate-distortion optimized vector quantization of wavelet coefficients is presented. A vector set partitioning algorithm is used to locate significant wavelet vectors which are classified into a number of classes based on their energies, thus reducing the complexity of the vector quantization. The set partitioning bits are reused to indicate the vector...
This paper proposes an effective data hiding scheme for a binary host image for the purpose of access control, authentication and copyright protection of digital media. The binary image is divided into blocks of size 2 x 2. These blocks are classified as embeddable or non-embeddable blocks according to their characteristic values, and a binary data sequence is embedded in those embeddable blocks by...
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