Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics Methods
Visible reflectance spectroscopy technique combined with three chemometrics methods were applied to predict the age of bloodstains for forensic purposes. The performance of models established by principal component regression (PCR), partial least-squares regression (PLSR), and least-squares-support...
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IEEE
2017-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/7814193/ |
| _version_ | 1818619180653477888 |
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| author | Huimin Sun Yongfang Dong Pingli Zhang Yaoyong Meng Wei Wen Nan Li Zhiyou Guo |
| author_facet | Huimin Sun Yongfang Dong Pingli Zhang Yaoyong Meng Wei Wen Nan Li Zhiyou Guo |
| author_sort | Huimin Sun |
| collection | DOAJ |
| description | Visible reflectance spectroscopy technique combined with three chemometrics methods were applied to predict the age of bloodstains for forensic purposes. The performance of models established by principal component regression (PCR), partial least-squares regression (PLSR), and least-squares-support vector machines (LS-SVM) methods were compared. Three models, built on three different age periods from 2 to 24 h, one to seven days, and seven to 45 days, were implemented to improve the predictive accuracy. The performance of three LS-SVM models are much better than that of PCR models and just a little better than that of PLSR models. Considering the effect of the specificity of bloodstains on model, LS-SVM model, built on the age period from 2 hours to 45 days, achieved correlation coefficient of the prediction set (Rp) = 0.9900, root mean square error of prediction (RMSEP) = 42.7920 hours, residual predictive deviation (RPD) = 7.6709. Models built on three age periods could significantly improve the predictive capability. The results demonstrate that the visible reflectance spectroscopy combined with LS-SVM would be a reliable tool to accurately estimate the age of bloodstains for forensic practical application. |
| first_indexed | 2024-12-16T17:33:23Z |
| format | Article |
| id | doaj.art-9596518053fc44508c222081adad5e29 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-16T17:33:23Z |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-9596518053fc44508c222081adad5e292022-12-21T22:22:52ZengIEEEIEEE Photonics Journal1943-06552017-01-019111410.1109/JPHOT.2017.26515807814193Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics MethodsHuimin Sun0Yongfang Dong1Pingli Zhang2Yaoyong Meng3Wei Wen4Nan Li5Zhiyou Guo6MOE Key Laboratory of Laser Life Science and Laboratory of Photonic Chinese Medicine, College of Biophotonics, South China Normal University, Guangdong, ChinaMOE Key Laboratory of Laser Life Science and Laboratory of Photonic Chinese Medicine, College of Biophotonics, South China Normal University, Guangdong, ChinaMOE Key Laboratory of Laser Life Science and Laboratory of Photonic Chinese Medicine, College of Biophotonics, South China Normal University, Guangdong, ChinaMOE Key Laboratory of Laser Life Science and Laboratory of Photonic Chinese Medicine, College of Biophotonics, South China Normal University, Guangdong, ChinaMOE Key Laboratory of Laser Life Science and Laboratory of Photonic Chinese Medicine, College of Biophotonics, South China Normal University, Guangdong, ChinaMOE Key Laboratory of Laser Life Science and Laboratory of Photonic Chinese Medicine, College of Biophotonics, South China Normal University, Guangdong, ChinaInstitute of Optoelectronic Material and Technology, South China Normal University, Guangdong, ChinaVisible reflectance spectroscopy technique combined with three chemometrics methods were applied to predict the age of bloodstains for forensic purposes. The performance of models established by principal component regression (PCR), partial least-squares regression (PLSR), and least-squares-support vector machines (LS-SVM) methods were compared. Three models, built on three different age periods from 2 to 24 h, one to seven days, and seven to 45 days, were implemented to improve the predictive accuracy. The performance of three LS-SVM models are much better than that of PCR models and just a little better than that of PLSR models. Considering the effect of the specificity of bloodstains on model, LS-SVM model, built on the age period from 2 hours to 45 days, achieved correlation coefficient of the prediction set (Rp) = 0.9900, root mean square error of prediction (RMSEP) = 42.7920 hours, residual predictive deviation (RPD) = 7.6709. Models built on three age periods could significantly improve the predictive capability. The results demonstrate that the visible reflectance spectroscopy combined with LS-SVM would be a reliable tool to accurately estimate the age of bloodstains for forensic practical application.https://ieeexplore.ieee.org/document/7814193/Age estimationchemometrics methodsvisible reflectance spectroscopybloodstainsforensic. |
| spellingShingle | Huimin Sun Yongfang Dong Pingli Zhang Yaoyong Meng Wei Wen Nan Li Zhiyou Guo Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics Methods IEEE Photonics Journal Age estimation chemometrics methods visible reflectance spectroscopy bloodstains forensic. |
| title | Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics Methods |
| title_full | Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics Methods |
| title_fullStr | Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics Methods |
| title_full_unstemmed | Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics Methods |
| title_short | Accurate Age Estimation of Bloodstains Based on Visible Reflectance Spectroscopy and Chemometrics Methods |
| title_sort | accurate age estimation of bloodstains based on visible reflectance spectroscopy and chemometrics methods |
| topic | Age estimation chemometrics methods visible reflectance spectroscopy bloodstains forensic. |
| url | https://ieeexplore.ieee.org/document/7814193/ |
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