This program convolves an NxM boxcar through a cube and trims (or NULLs)
pixels. A pixel at the center of the boxcar is trimmed in the output cube
if the number of valid pixels inside the boxcar is less than a user
specified minimum. Valid pixels are defined as those which are 1) not
special pixels and 2) inside the range of the LOW and HIGH parameters.
This is a very powerful trimming tool although much
thought must be put into the parameters in order to obtain the optimal
trimming results.
This is the total number of samples in the boxcar.
It must be odd and can not exceed twice the number of samples
in the cube. In general, the size of the boxcar does not
cause the program to operate significantly slower.
This is the total number of lines in the boxcar.
It must be odd and can not exceed twice the number of lines
in the cube. In general, the size of the boxcar does not
cause the program to operate significantly
slower.
Valid minimum pixel value that will be used in boxcar computation. If
a pixel value is less than LOW then it will not be used when
computing boxcar counts.
Valid maximum pixel value that will be used in boxcar computation. If
a pixel value is greater than HIGH then it will not be used when
computing boxcar counts.
This is the minimum number of valid pixels which must occur inside the
NxM boxcar in order to preserve the output pixel.
For example, a 3x5 boxcar has 15 pixels
inside. If MINIMUM=10 then the trimming will occur if there are 9 or
less valid pixels. A valid pixel is one that is not special (NULL, LIS,
etc) and is in the range defined by LOW to HIGH.
