The function fspecial from the image package produces wrong results with
the
"motion" filter shape.
When the first parameter is set to "motion" and when the third parameter
which
then represents the orientation of the motion is set to something other
than
null degrees, then the resulting matrix only contains NA elements.
I have experienced this problem on a Cygwin installation.
Here is an example:
psf = fspecial("motion", 5, 0)
psf =
0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0
0.2 0.2 0.2 0.2 0.2
0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0
This is example produced correct results, but when I change the orientation
parameter to 10 degrees, then
psf = fspecial("motion", 5, 10)
psf =
NA NA NA NA NA
NA NA NA NA NA
NA NA NA NA NA
NA NA NA NA NA
NA NA NA NA NA
the returned matrix only contains NA elements. I would expect a correctly
interpolated motion matrix here.
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