Determining the age of latent fingerprint traces found at crime scenes is an unresolved research issue since decades. In prior work, we have suggested to use optical, non-invasive image sensory in combination with a new aging feature called ‘binary pixel’ (shown to have a characteristic logarithmic aging tendency on hard disk platters) to solve this important research challenge. In this paper, we evaluate the influence of the fingerprint application process (such as contact pressure, contact time, smearing of the fingerprint or contamination with skin lotion or oil) on the aging curves of the binary pixel feature (inter-application-factor-variance). We furthermore evaluate differences of fingerprint traces applied in a similar way (intra-application-factor-variance). Examining 25 fingerprint samples of a test subject with a total of 500 scans, we show that the application of substances to a finger seems to increase the present amount of residue and that substances containing water increase the aging speed of a fingerprint trace significantly.
[1]
Jana Dittmann,et al.
Non-destructive forensic latent fingerprint acquisition with chromatic white light sensors
,
2011,
Electronic Imaging.
[2]
N. Liappis,et al.
Quantitative study of free amino acids in human eccrine sweat excreted from the forearms of healthy trained and untrained men during exercise
,
2004,
European Journal of Applied Physiology and Occupational Physiology.
[3]
Krystyna Baniuk,et al.
Determination of age of fingerprints
,
1990
.
[4]
Ronny Merkel,et al.
Privacy Preserving Challenges: New Design Aspects for Latent Fingerprint Detection Systems with Contact-Less Sensors for Future Preventive Applications in Airport Luggage Handling
,
2011,
BIOID.