Automatic Screening and Grading of Age-Related Macular Degeneration from Texture Analysis of Fundus Images

Table 6

Confusion matrix in percentage for grading in two steps ( versus versus and then versus ).

%	SVM (Gini)				RF (Gini)				Grader B
Nb img	279				279				176
Grader A	1	2	3	4	1	2	3	4	1	2	3	4
1	22.6	4.3	1.1	0.3	21.9	5.0	0.7	0.7	31.2	9.5	0.6	0.0
2	4.3	18.3	4.3	1.4	4.7	19.7	2.5	1.4	4.5	19.3	6.2	0.6
3	1.8	4.7	12.2	4.6	3.6	7.1	10.0	2.5	0.0	3.4	7.4	2.8
4	0.7	1.1	5.0	13.3	1.1	1.8	4.7	12.5	0.0	1.1	1.1	13.1
Accuracy	66.3				64.2				71.5
Weighted (95% CI)	66.2 (59.7–72.6)				61.0 (53.8–68.1)				73.6 (66.1–80.2)
	Substantial				Substantial				Substantial