Identification of Human Body Fluid Stains and Non-Biological Stains by Three-Dimensional Fluorescence Spectroscopy

doi:10.12116/j.issn.1004-5619.2020.500309

Abstract

Abstract:

Objective To establish a rapid and nondestructive identification method for human body fluid stains and non-biological stains using three-dimensional fluorescence spectroscopy. Methods The collected three-dimensional fluorescence spectrum data of human saliva, 3% blood, coffee and Fanta^? stains were processed with dimensionality reduction. ^{After wavelet transform, spectral denoising and feature extraction, the classification formula was established. The Fisher discriminant was used for spectrum matching and recognition to establish the analysis method to distinguish stain types. Results According to the results of data training and comparison, all the recognition accuracies of Fanta^?, coffee, saliva and blood were more than 91.39%. Among them, saliva reached 100% recognition accuracy. Conclusion Three-dimensional fluorescence spectroscopy is a potential method for rapid and nondestructive identification of biological and non-biological stains.}

Key words: forensic medicine, three-dimensional fluorescence spectroscopy, saliva, blood, non-biological stains, identification of body fluid stains

CLC Number:

DF795.2

Jing-jing CHANG, Hui ZHOU, Jin ZHANG, Xiao-yu XU, Feng WANG, Sheng-jun XIONG, Guang-feng ZHANG, Xue-ying YANG, Kai-hui LIU. Identification of Human Body Fluid Stains and Non-Biological Stains by Three-Dimensional Fluorescence Spectroscopy[J]. Journal of Forensic Medicine, 2023, 39(1): 40-44.

Figures/Tables 5

References 16

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序号	D₁	D₂	D₃	D₄
1	757.74	-706.05	-823.46	-438.74
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1	-125.63	356.83	-190.67	-734.68
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