The booming of Internet offers a completely new area for human's knowledge activities characterized with the compression of time and space.
互联网的崛起，为人类的知识活动形塑了一个以时间和空间压缩为基本特征的全新场域。
Because compression algorithms are typically space and time efficient, the method based on it also has good performance.
由于压缩算法是空间和时间高效性算法，使得应用该算法的相异度度量也具有较好的性能。
During transmitting and storing information of digital image, in order to decrease the time of transmission and the space of storage, image compression procedure must to be done.
在图像的传输和存储过程中，为减少传输时间与存储空间，必须进行图像压缩。
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