Schuler Rebecca L, Kish Paul E, Plese Cara A
ChemImage Corp., 7301 Penn Avenue, Pittsburgh, PA 15208, USA.
J Forensic Sci. 2012 Nov;57(6):1562-9. doi: 10.1111/j.1556-4029.2012.02171.x. Epub 2012 May 7.
The analysis of bloodstain patterns can assist investigators in understanding the circumstances surrounding a violent crime. Bloodstains are routinely subjected to pattern analysis, which is inherently dependent upon the ability of the examiner to locate and visualize bloodstain patterns on items of evidence. Often, the ability to properly visualize bloodstain patterns is challenging, especially when the stain patterns occur on dark and/or patterned substrates. In this study, preliminary research was performed to better understand how near-infrared reflectance hyperspectral imaging (HSI) could be used to observe bloodstain patterns on commonly encountered black fabrics. The ability of HSI to visualize latent bloodstains on several commonly encountered substrates is demonstrated. The images acquired through HSI are of sufficient quality to allow for differentiation between stains produced from an impact mechanism or a transfer mechanism. This study also serves as a proof of concept in the differentiation of multiple staining materials. Because of its ability to generate spectral data, the data provide a preliminary separation of stains where more than one type of stain existed.
血迹模式分析有助于调查人员了解暴力犯罪的相关情况。血迹通常会进行模式分析，这本质上依赖于检验人员在证据物品上定位和观察血迹模式的能力。通常，正确观察血迹模式具有挑战性，尤其是当血迹模式出现在深色和/或有图案的底物上时。在本研究中，进行了初步研究，以更好地了解近红外反射高光谱成像（HSI）如何用于观察常见黑色织物上的血迹模式。展示了HSI在几种常见底物上观察潜在血迹的能力。通过HSI获取的图像质量足以区分由撞击机制或转移机制产生的污渍。本研究还作为区分多种染色材料的概念验证。由于其生成光谱数据的能力，这些数据提供了对存在不止一种污渍类型的污渍的初步分离。
