The distribution law of DEM data can provide the reference evidence for selecting color layer and chroma to represent landform.
在用分层设色表示地貌时，DEM数据分布规律是合理地选择色层和色度的重要参考依据。
To process chroma interpolation, a parallel structure with a realization of 2-level multiplications for each row reference data is put on, that makes the reusage of the mulplicator.
对于色度插值，文中同样提出了一种并行处理结构，复用乘法器单元对每一行的参考数据处理进行2级乘法实现。
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