Main > HPArticle > Enhancement of rapid lifetime determination for time-resolved fluorescence imaging in forensic examination
  • Abstract
  • Get PDF
  • Paper information
  • Manuscript Accepted: Oct. 9, 2020

    Online Published: Oct. 10, 2020

Chinese Optics Letters, 2021, Vol. 19, Issue 4, pp.

Enhancement of rapid lifetime determination for time-resolved fluorescence imaging in forensic examination [Early Posting]

Zhong Xin, Wang Xinwei, Sun Liang, Zhou Yan

Author Affiliations

  • University of the Chinese Academy of Sciences
  • University of the Chinese Academy of Sciences
  • University of the Chinese Academy of Sciences

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 region of interest from dual-gated fluorescence intensity images, and then the fluorescence lifetime image is reconstructed based on rapid lifetime determination algorithm. Furthermore, a max-min 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 document written by two brands of highlighters with the same color and close fluorescence lifetime.

keywords