Laser & Optoelectronics Progress, Volume. 61, Issue 18, 1812005(2024)

Research on the Retention Time of Sweat Latent Fingerprints on Glass by Hyperspectral Combination with Multiple Models

Pengyu Tang1 and Zhen Wang1,2、*
Author Affiliations
  • 1College of Forensic Sciences, Criminal Investigation Police University of China, Shenyang 110035, Liaoning, China
  • 2Key Laboratory of Impression Evidence Examination and Identification Technology, Ministry of Public Security,Criminal Investigation Police University of China, Shenyang 110854, Liaoning, China
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    This study explores the prediction of latent sweat fingerprint retention time on glass using hyperspectral imaging combined with multiple models. The hyperspectral image data of latent sweat fingerprints on glass were collected, and Savitzky-Golay (SG) convolutional smoothing and standard normal variate transformation were performed on the original spectral data. The feature bands were selected using successive projections algorithm, and then support vector machine (SVM), genetic algorithm back propagation (GA-BP) neural network, and partial least squares regression (PLSR) models were constructed and compared for predicting the latent sweat fingerprint retention time on glass in both full and feature bands. The results indicate that these three models are not applicable in the full band. In the feature band, the values of root mean square error of prediction of SVM, GA-BP neural network, and PLSR models reached 3.247 d, 3.035 d, and 3.060 d, respectively, with coefficient of determination reaching 0.627, 0.659, and 0.606, respectively. The relative percent deviation is higher than 1.4 with all the three models, thus predicting the retention time of fingerprints to a certain extent. Notably, hyperspectral imaging technology combined with multiple models can be used to predict the retention time of sweat latent fingerprints on glass.

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    Pengyu Tang, Zhen Wang. Research on the Retention Time of Sweat Latent Fingerprints on Glass by Hyperspectral Combination with Multiple Models[J]. Laser & Optoelectronics Progress, 2024, 61(18): 1812005

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Dec. 5, 2023

    Accepted: Feb. 18, 2024

    Published Online: Sep. 14, 2024

    The Author Email: Zhen Wang (wangyuchena9@163.com)

    DOI:10.3788/LOP232622

    CSTR:32186.14.LOP232622

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