Optimal edge detection using multiple operators for image understanding

EURASIP Journal on Advances in Signal Processing

Table 3 Edge map similarity

	Rothwell	Bergholm	Canny	Schunck	Lacroix	Deriche	ROC	Weighted kappa coeff. (r= 0.7)
Buildings	0.6886	0.5895	0.6892	0.6804	0.6570	0.6871	0.6946	0.7355
Baseball	0.6815	0.6359	0.6961	0.6848	0.6579	0.6934	0.6995	0.7249
Airfield	0.7692	0.7651	0.7593	0.7382	0.7162	0.7516	0.7760	0.8492
Homes	0.6332	0.5978	0.6851	0.6762	0.7143	0.6169	0.7064	0.7599
Large building	0.6844	0.5401	0.6976	0.6730	0.6823	0.7082	0.7014	0.7506
Main building	0.6967	0.6191	0.6612	0.6499	0.6988	0.6088	0.6998	0.8357
Pool tennis	0.6722	0.5923	0.7208	0.6596	0.6527	0.7100	0.7046	0.7639
School	0.6495	0.5846	0.6743	0.6474	0.6419	0.6458	0.6669	0.7835
Series	0.7577	0.6084	0.7682	0.7656	0.7259	0.6810	0.7767	0.8090
Woods	0.6581	0.5912	0.6849	0.6748	0.6760	0.5667	0.6922	0.7448