Abstract: Various excitation light sources were used to compare the effects of eliminating characters background from inkfingerprints by spectral imaging and luminescence. Totally 81.3％ of inkfingerprints treated by spectral imaging reached identification level, while they were treated by luminescence, the identification effect is very poor. Spectral imaging shows much more advantages than luminescence in eliminating characters background from inkfingerprints. As a latest nondestructive optics technique, spectral imaging will show a great potential in fingerprint detection.

Key words: spectral imaging, fingerprint, eliminate, background