Fig. 2

Example images of the test databases and their image quality value estimated by EVA. Example images for one subject from each database: Victoria Police pseudo fingermark database (1a–1f), IIIT-D lifted from a card (2a–2f), IIIT-D lifted from a tile (3a–3f) and Happy Feet (4a–4f). Columns a–e are specimens taken from the test set and column f is the corresponding reference image. The EV scores q are stated in the bottom left corner of each individual image. This does not apply to the reference images except for the ballprints where we selected the best of the specimens as reference