Draws images describing the orientation
of the current image.
orient gives an HSV image
(run a hsv_to_rgb pass on it
to get a viewable image).
corresponding to the angle of the
orientation:
| / - \
hue= 0 64 128 192 (=red in an hsv image)
purple cyan green red
Red, green and blue channels are added
and not compared separately.
If you first use orient4 you can give its
output as input to this function.
The orient4 function gives back
4 image objects, corresponding to the
amount of different directions, see above.