Physics Section

The Physics Section provides research and development in forensic sciences using applied physics. The research is conducted on wide range of topics such as image processing and analysis of crime scene images, latent fingerprint or oil detection using laser, radiation measurements for radiological or nuclear threat, and forensic analysis of malfunctioned electronic controllers. In addition, we provide scientific examination and analysis to law enforcement community.

Research and Development of Time-Resolved Imaging Spectroscopy Method using Lasers

We developed systems which can visualize the fluorescence of samples using various lasers from ultraviolet to infrared. Laser spectroscopy has the advantage of examining samples, nondestructively. Furthermore, we have studied detection methods for fingerprints by time-resolved imaging spectroscopy, which has the advantage of effective detection of fingerprints. Also, we have been studying on a fingerprints imaging method by the two-photon excitacion with a femto-second laser system.

Tunable laser system.
Fingerprint fluorescence image is shown in the lower right corner.

Femto-second two-photon excitacion laser system.
Fingerprint fluorescence image is shown in the upper right corner.


Research and Development on Forensic Image Analyses

Image analysis software
Example of multi-frame super-resolution image enhancement by the forensic software developed in the Physics section. (a) recorded image (nearest neighbor interpolated), (b) enlarged image using a single frame, (c) enhanced image using multiple frames.

The following forensic image analysis methods are examples of our research & development scopes: Measurement of physical quantities such as a suspect's height and a vehicle's running speed by means of the photogrammetry, Source camera identification, Image enhancement / restoration, Identification of objects and individuals from images, Detection of traces by image tampering, etc.