AN EFFICIENT FAST ENCODING ALGORITHM FOR VECTOR QUANTIZATION

IntroductionAs an effective technique for data compression,VQ[1,2 ] has been successfully used forvarious ap-plications involving VQ- based encoding and VQ-based recognition in both vocal and image pro-cessing.The k- dimensional,N- level vectorquantizer is defined as a mapping from a k- di-mensional Euclidean space Rkinto a certain finitesubset C={Ci,i=1 ,2 ,… ,N },which is called acodebook and whose elements Ci are called code-words.A distortion measure D( X,Ci) is a non-negative dissi…     

涂装车间废气净化技术的国内外水平和发展动向

涂装作业所产生的有毒,有害气体主要有涂漆前处理各槽散发的酸碱气体,喷漆过程中喷逸的漆雾粒子和挥发的有机溶剂蒸气,电泳槽散发的恶臭,涂件在流平和烘干过程中生成的热分解物和有机溶剂蒸气。净化上述废气,常用的有液体吸收法、固体吸附法和燃烧法。此外,为了捕集和净化漆雾粒子还使用了各种类型的喷漆室。下面将这些方法的国内外水平和发展动向简述之。     

AN EFFICIENT BTC IMAGE COMPRESSION ALGORITHM

IntroductionBlock truncation coding( BTC) [1] is a simple andfast lossy image coding technique,which has theadvantage of being easy to implement comparedto transform coding and vector quantization[2 ] .Its simplicity,performance and channel error re-sisting capability make it attractive in the real-time image transmission.BTC is a one- bit adap-tive moment- preserving quantizer that preservescertain statistical moments of small blocks of theinput image in the quantized output.The origi-nal …