point spread

基本解释

Only blind image restoration algorithms can be used in space solar telescope(SST) image processing when the point-spread function is unknown.
图像恢复是太空太阳望远镜（SST）图像处理的重要组成部分，当点扩散函数未知时只能进行盲恢复。
There exist three sampling methods according to the sampling objects: the transfer function sampling, the point-spread function sampling and the weighting function sampling.
理论分析表明，按照抽样对象的不同，存在三种适用范围不同的算法：传递函数抽样法、点扩展函数抽样法和加权函数抽样法。
The primary difficulty with blind image restoration is insufficient information. This calls for proper incorporation of apriori knowledge about the image and the point-spread function(PSF).
盲图像恢复的主要困难是信息不足，而为了恢复图像和确定点扩散函数需要适当的先验知识。

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