Select the filter size for removing some 3D points considered as outliers.
For example. If the value is F, the filter is the area whose base is a '2F + 1' square parallel with the XY plane of the 3D data.And if each 3D point whose Z height is far different from the heights of the other 3D points in the filter whose center is the 3D point, the 3D point is removed as an outlier. Specify a number between 1 and 10.