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Up to now, the VQ-based steganographic methods are all lossy approaches since they cannot recover the cover images. Prior studies on reversibility in VQ-based steganography only show the ability to recover the quantized cover images. This paper presents a new two-phase steganographic protocol of genuine VQ-based reversibility, referring to the ability of using a VQ codebook to recover a target cover...
Many traditional clustering algorithms have the scalability problem while dealing with large data sets. One common strategy to handle the problem is to parallelize the algorithms and execute them along with the input data on high-performance computers. However, many graph-based clustering algorithms are hard to be parallelized since they need to calculate the similarity of all-pairs of all data nodes...
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