incrementing said position of said edge detection filter in the first direction, wherein the incremented position is associated with {HEAD ~ pixels} of {TAIL ~ a next row} of said image 
incrementing said position of said edge detection filter in the first direction , wherein the incremented position is associated with { HEAD ~ pixels } of { TAIL ~ a next row } of said image
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH