FILTERSTEP
THE BOX'S MAIN HELP:
This function filters the EDG value over the area of THR, using WID as the width and FLT as the filtering kernel.
EDG (input):
This must be a float. This is the the edge to be filtered.
THR (input):
This must be a float. This is the threshold value.
WID (input):
This must be a float. This is the width of the filter.
FLT (input):
This must be a string. The default is "catmull-rom". This is the filter kernel to be used. The other filters available are: "box", "triangle" or "gaussian".
OUT (output):
This function filters the EDG value over the area of THR, using WID as the width and FLT as the filtering kernel.