采用高光谱技术结合化学计量法,对市面上常见的42种不同品牌、型号的黑色染料笔墨迹进行分类鉴别。首先,对42种黑色染料笔的墨迹样品进行450-950 nm区间的高光谱扫描;借助SPSS 26软件和Origin Pro 2023,采用系统聚类分析方法对墨迹样品...采用高光谱技术结合化学计量法,对市面上常见的42种不同品牌、型号的黑色染料笔墨迹进行分类鉴别。首先,对42种黑色染料笔的墨迹样品进行450-950 nm区间的高光谱扫描;借助SPSS 26软件和Origin Pro 2023,采用系统聚类分析方法对墨迹样品进行分类,并用主成分分析来验证分类的结果。对高光谱数据进行系统聚类分析,能将42种墨迹样品分为两大类共7小类,其中油基笔4类,水基笔3类;经主成分分析验证其分类效果合理。结果表明,高光谱技术结合化学计量法能够对黑色染料笔墨迹进行分类和鉴别,为实际案件中黑色染料笔墨迹的检验提供了技术支撑。展开更多
Identification of altered documents written in black gel ink is widely recognized as problematic,especially if both the original and alteredstrokes contain carbon.In this work,we used a black handwriting resistance me...Identification of altered documents written in black gel ink is widely recognized as problematic,especially if both the original and alteredstrokes contain carbon.In this work,we used a black handwriting resistance measurement instrument to measure the resistance values ofink strokes.Because black gel inks are made with different types of pigments,their resistance values could be used to differentiate betweendifferent pen models from the same brand and among brands.In this study,30 black gel inks were classified by their resistance values.In apair‑wise comparison analysis of the results,there were 435 possible pairs and 347(i.e.,79.8%of the total)of these were able to be effectivelydistinguished.This is a nondestructive,convenient,and effective method to identify altered documents.展开更多
文摘采用高光谱技术结合化学计量法,对市面上常见的42种不同品牌、型号的黑色染料笔墨迹进行分类鉴别。首先,对42种黑色染料笔的墨迹样品进行450-950 nm区间的高光谱扫描;借助SPSS 26软件和Origin Pro 2023,采用系统聚类分析方法对墨迹样品进行分类,并用主成分分析来验证分类的结果。对高光谱数据进行系统聚类分析,能将42种墨迹样品分为两大类共7小类,其中油基笔4类,水基笔3类;经主成分分析验证其分类效果合理。结果表明,高光谱技术结合化学计量法能够对黑色染料笔墨迹进行分类和鉴别,为实际案件中黑色染料笔墨迹的检验提供了技术支撑。
基金This study was supported by the Program of the Major Research and Development Projects of Shandong Province(Grant No.2017GSF20110)This study was supported by the Program of the Major Research and Development Projects of Shandong Province(2017GSF20110)This article was accepted by the 3rd International Symposium on Sino Swiss Evidence Science(3rd ISSSES),held by China University of Political Science and Law.
文摘Identification of altered documents written in black gel ink is widely recognized as problematic,especially if both the original and alteredstrokes contain carbon.In this work,we used a black handwriting resistance measurement instrument to measure the resistance values ofink strokes.Because black gel inks are made with different types of pigments,their resistance values could be used to differentiate betweendifferent pen models from the same brand and among brands.In this study,30 black gel inks were classified by their resistance values.In apair‑wise comparison analysis of the results,there were 435 possible pairs and 347(i.e.,79.8%of the total)of these were able to be effectivelydistinguished.This is a nondestructive,convenient,and effective method to identify altered documents.
