There are two parts: loseless compression and lossy compression.

分为两个部分: 无损压缩和有损压缩.

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The trend in medical image compression isincreasingly toward lossy compression.

在分析对比了几种广泛实用的无损与有损压缩方法的基础上,针对医学图像有损压缩的总体趋势,提出 了 一种有损与无损方法相结合的、有较高保真度的压缩方法:分区压缩方法.

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Near lossless compression is a trade off between lossy compression and lossless compression.

近无损压缩是在无损压缩和有损压缩之间的一种折衷.

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Vector quantization ( VQ ) is a popular lossy compression scheme widely used in multimedia data compressions.

矢量量化是一种常用有损压缩技术,被广泛地应用于多媒体数据压缩.

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As one method of image lossy compression vector quantization has great compression ratio.

作为图像有损压缩的方法之一,矢量量化的压缩比极大.

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However, it performs a little worse compared to the conventional Discrete Wavelet Transform ( DWT ) for lossy compression.

而在有损压缩方面, 其效果通常稍逊于传统的离散小波变换(DWT ).

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Tzung - ruin Yeh Many lossy image compression algorithms have been developed for low bit rate applications.

人们已经发展出许多适用于低位元率应用的破坏性影像压缩演算法.

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Besides, the general variation principle was introduced to solve electromagnetic problem in lossy media.

同时由于广义变分概念的引入, 可使泛函的变分原理应用于有耗媒质电磁场问题.

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