Table 5.
Ground-truth and performance comparison for two-stage glaucoma classification.
| Database and number of images used | Ground truth | RDR-based results | CDR-based results | ISNT-based results | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| N | G | N | G | OCA | N | G | OCA | N | G | OCA | |
| Drishti-GS (50) | 16 | 34 | 12 | 38 | 43/50 | 21 | 29 | 40/50 | 08 | 42 | 37/50 |
| Drions-DB (100) | 90 | 10 | 88 | 12 | 85/100 | 79 | 21 | 80/100 | 70 | 30 | 71/100 |
| Messidor (100) | 92 | 08 | 91 | 09 | 91/100 | 82 | 18 | 80/100 | 75 | 25 | 73/100 |
| Forus (126) | 100 | 26 | 99 | 27 | 124/126 | 105 | 21 | 110/126 | 86 | 40 | 100/126 |
| Bosch (60) | 60 | 00 | 59 | 01 | 59/60 | 58 | 02 | 58/60 | 53 | 07 | 50/60 |
| Consolidated (436 images) | 358 | 78 | 349 | 87 | 402/436 (92.20%) | 345 | 91 | 368/436 (84.40%) | 292 | 144 | 331/436 (75.92%) |
(N – Normal; G – Glaucomatous; OCA – Overall Classification Accuracy).