TABLE I.

Accuracy of the cross-correlation registration algorithm at estimating translations and the PF algorithm at estimating rotations and scale changes. Quoted figures are the differences between estimated and true values. Statistics are over 200 samples (μ = mean, σ = SD).

Energy	Δ x/y shift (pixels)	Δ rotation (degrees)	Δ scale change (%)
6 MV	Range = −0.012 : 0.011	Range = −0.030 : 0.038	Range = −0.196 : 0.214
	μ ± σ = 0.000 ± 0.005	μ ± σ = 0.006 ± 0.010	μ ± σ = 0.005 ± 0.06
18 MV	Range = −0.012 : 0.011	Range = −0.013 : 0.018	Range = −0.110 : 0.089
	μ ± σ = 0.000 ± 0.005	μ ± σ = 0.000 ± 0.005	μ ± σ = −0.009 ± 0.04