Global Optimization of Redescending Robust Estimators

Table 4

Circle parameters (P₁, P₂, and P₃) fitted to the data obtained with different nonredescending estimators computed by GO and by IRLS and corresponding best values of the objective function f.

	LS		L1-norm		L1.5-norm
	IRLS	GO	IRLS	GO	IRLS	GO
P1	−63.096	−63.096	−60.860	−60.862	−61.924	−61.924
P2	−38.620	−38.620	−38.072	−38.047	−38.755	−38.755
P3	1043.74	1043.74	1004.87	1004.53	1031.39	1031.38
fbest	25766225	25766225	185947	185947	2003060	2003060