Table 3.

C_llr values for each combination of feature set and segmented region for Model 1 v 9.

	Segmented Region
Feature Set	whole region of interest		breech face	firing pin	breech face + firing pin
	including flowback	excluding flowback			feature concat.	score-level fusion
central moments	0.485	0.497	0.542	0.843	0.506	0.534
circle-moment invariants	0.465	0.494	0.527	0.913	0.524	0.529
Legendre moments	0.420	0.501	0.549	0.822	0.546	0.534
concentric-circle features (mag.)	0.416	–	–	–	–	–
concentric-circle features (mag. & phase)	0.363	–	–	–	–	–
Zernike moments (mag.)	0.359	0.441	0.493	0.699	0.406	0.421
Zernike moments (mag. & phase)	0.351	0.450	0.508	0.678	0.401	0.430