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使用高光谱成像对人类和动物血污的歧视

Gary Sean Cooney¹, Hannes Köhler¹, Claire Chalopin¹

¹Innovation Center Computer Assisted Surgery (ICCAS), Leipzig University, Leipzig, Germany.

Forensic science, medicine, and pathology

|September 18, 2023

概括

可见近红外高光谱成像 (HSI) 提供了一种快速,非破坏性的方法来区分人类和动物的血污. 这项技术通过在犯罪现场快速确定血液来源来帮助法医调查,从而降低了成本和样品消耗.

科学领域:

法医科学法医科学法医科学
生物光子学生物光子学
分析化学分析化学

背景情况:

血迹是法医调查中至关重要的生物证据.
目前用于确定血液来源的方法可能是昂贵的,并消耗样品.
在调查的早期,区分人类和动物血液至关重要.

研究的目的:

引入和评估可见近红外高光谱成像 (HSI) 用于区分人类和动物的血污.
开发一种快速,非接触和非破坏性的血液来源确定方法.
评估HSI在法医工作流程中的潜力.

主要方法:

使用了一种便携式,非接触式,可见近红外高光谱成像系统.
一个支持矢量机 (SVM) 二元分类器被训练使用人类和动物血污的高光谱数据.
在独立的数据集上测试了SVM模型,以评估其性能.

主要成果:

SVM模型实现了高性能指标:96%的准确性,97%的精度,95%的灵敏性和96%的特异性.
HSI成功地区分了人类和动物的血污,即使是老化样本 (长达两个月).
分段图像清楚地可视化了血液来源的分化.

结论:

可见近红外高光谱成像是一种有前途的工具,用于在法医环境中快速,准确和非破坏性地确定血液来源.
将HSI整合到法医工作流程中可以消除有关血液来源的模糊性,并可能增强现场分析.
结合年龄确定方法的HSI技术,为法医调查提供了一种强大的方法.

关键词:

动物血液是动物的血液.法医科学法医科学超光谱成像 (HSI) 是一种超光谱成像技术.邻居组件特征选择 (NCFS)支持矢量机器 (SVM) 是一个支持矢量机器.

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