A method for applying {HEAD ~ an edge detection filter} to {TAIL ~ an image} comprising the steps of: 
A method for applying { HEAD ~ an edge detection filter } to { TAIL ~ an image } comprising the steps of :
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH