Author(s): Zhong, X (Zhong, Xin); Wang, XW (Wang, Xinwei); Sun, L (Sun, Liang); Zhou, Y (Zhou, Yan)

Source: CHINESE OPTICS LETTERS Volume: 19 Issue: 4 Article Number: 041101 DOI: 10.3788/COL202119.041101 Published: APR 10 2021

Abstract: An enhancement method of rapid lifetime determination is proposed for time-resolved fluorescence imaging to discriminate substances with approximate fluorescence lifetime in forensic examination. In the method, an image-exclusive-OR treatment with filter threshold adaptively chosen is presented to extract the region of interest from dual-gated fluorescence intensity images, and then the fluorescence lifetime image is reconstructed based on the rapid lifetime determination algorithm. Furthermore, a maximum and minimum threshold filtering is developed to automatically realize visualization enhancement of the lifetime image. In proof experiments, compared with traditional fluorescence intensity imaging and rapid lifetime determination method, the proposed method automatically distinguishes altered and obliterated documents written by two brands of highlighters with the same color and close fluorescence lifetime.

Accession Number: WOS:000640496100008

ISSN: 1671-7694

Full Text: https://www.osapublishing.org/col/abstract.cfm?uri=col-19-4-041101&origin=search