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Databases
Four different databases (DB1, DB2, DB3 and DB4) were collected by using the following sensors/technologies:
- DB1: low-cost optical sensor "Secure Desktop Scanner" by KeyTronic
- DB2: low-cost capacitive sensor "TouchChip" by ST Microelectronics
- DB3: optical sensor "DF-90" by Identicator Technology
- DB4: synthetic fingerprint generation.
Each database is 110 fingers wide (w) and 8 impressions per finger deep (d) (880 fingerprints in all); fingers from 101 to 110 (set B) have been made available to the participants to allow parameter tuning before the submission of the algorithms; the benchmark is then constituted by fingers numbered from 1 to 100 (set A).
| Sensor Type | Image Size | Set A (wxd) | Set B (wxd) | Resolution | |
| DB1 | Low-cost Optical Sensor | 300x300 | 100x8 | 10x8 | 500 dpi |
| DB2 | Low-cost Capacitive Sensor | 256x364 | 100x8 | 10x8 | 500 dpi |
| DB3 | Optical Sensor | 448x478 | 100x8 | 10x8 | 500 dpi |
| DB4 | Synthetic Generator | 240x320 | 100x8 | 10x8 | about 500 dpi |
The following figure shows a sample image from each database:
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