For image registration, the described architecture uses block based comparisons of image blocks of a captured image relative to {HEAD ~ blocks} of {TAIL ~ another reference image} to support image registration on a block by block basis 
of
For image registration , the described architecture uses block based comparisons of image blocks of a captured image relative to { HEAD ~ blocks } of { TAIL ~ another reference image } to support image registration on a block by block basis
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 OTH OTH OTH OTH OTH OTH OTH