The paper also gives an algorithm for estimating the variance of the imaging noises by computing residual deconvolution errors, which is used in the second step of the modified Wiener filter.
对改进算法中二次滤波的噪声方差参数选取采取一种计算反卷积剩余误差的方法，用在第二次滤波步骤中。
Second is refinement step, in which spatial objects resulted from filter step are subjected to exacted computation.
第二步为细化步骤，对从第一步中筛选出的空间对象进行精确的空间运算操作。
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