3.1 Database
Database used for experiment is DB4 FVC2004. Several fingerprint images in this database are low quality.
Size of each fingerprint images is 288x384 pixels, and its resolution is 500 dpi.
FVC2004 DB4 has 800 fingerprints of 100 fingers (8 images for each finger).
Fingerprint images are numbered from 1 to 100 followed by a another number (from 1 to 8)
which mean that the image fingerprint is first to 8th impression of certain finger