Optional-SearchFactor is in degrees --- e.g. 10 = search in 10 degree increments .
Radian-Fraction should be between 0 and 1 --- will search this arc +/- around prin‐
cipal axis. Optional-bool-UsePrincipalAxes determines whether the rotation is
searched around an initial principal axis alignment. Default = false.
Optional-uint-UseLocalSearch determines if a local optimization is run at each
search point for the set number of iterations. Default = 20.antsAffineInitializer 2.2.0 August 2017 ANTSAFFINEINITIALIZER(1)