The subject image tracking, performed by mapping D into E is represented by the relationship: ##EQU2## where {HEAD ~ Mult} is {TAIL ~ a multiplicative constant}, and Bias is an additive constant 
The subject image tracking , performed by mapping D into E is represented by the relationship : # # EQU2 # # where { HEAD ~ Mult } is { TAIL ~ a multiplicative constant } , and Bias is an additive constant
OTH OTH OTH 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