Automatic CDR Estimation for Early Glaucoma Diagnosis

Table 4

Mean absolute error of four contributions to obtain an overall quality comparison.

Method	Mean absolute error			Image database
	VCDR	HCDR	ACDR	Number of images	Availability	Gold standard: number of experts
Mittapalli and Kande [28]	0.13	0.12	0.15	59	40 private; 19 public	1
Fondon et al. [34]	—	—	0.14	55	Private	1
Ayub et al. [53]	0.14	—	—	100	Private	—
Septiarini et al. [26]	0.04	—	0.06	68	Private	3
Proposed in this paper	0.01	0.11	0.08	120	60 private; 60 public	2