Challenges in Contact-Less Latent Fingerprint Processing in Crime Scenes: Review of Sensors and Image Processing Investigations
The contactless acquisition of untreated latent fingerprint traces with various sensing and image processing techniques is an upcoming opportunity in crime scene forensics. Current analyses of imaging sensor systems show the applicability but dependence on several factors e.g. substrate type, latent trace structure and scanning technology. Also, spectroscopy might be used on fingerprints to determine their chemical composition. Multi-sensor devices might cover huge ranges of different application scenarios. Beside single-sensor tuning and multi-sensor fusion approaches for quality improvement of 3D scan data for localisation (coarse scan), acquisition (detailed scan) and analysis of fingerprint traces, new challenges arise.