显微分光光度法与显微红外光谱综合方法在黑色中性笔字迹鉴定中的应用

发布时间：2018-10-21 14:32

【摘要】：以黑色中性笔字迹为研究对象,共收集10个不同厂家不同型号的样本56份,结合化学计量学的方法对黑色字迹样本的显微红外谱图和显微分光谱图进行处理。对显微红外谱图进行聚类分析和相似度比较,以区分不同成分的字迹;利用聚类分析,可将56份样本中的47份按成分不同分为6大类;利用相似度的概念,可对谱图的差异性进行量化;显微分光谱图主要进行色差计算,以区分不同色度的字迹;利用色差计算公式,计算两样品间的色差,共得1596份色差数据,色差小于1的数据为31份,占全部比对样品的1.9%;将显微红外和显微分光分析结果进一步结合比对,可发现红外谱图聚为一类的样本之间有较大的色差,而色差很小的样本其红外谱图有较大差异,从而可将56份黑色字迹区分,为字迹的鉴定提供了新思路和新方法。
[Abstract]:Taking the black neutral handwriting as the research object, 56 samples of different types from 10 different manufacturers were collected, and the microscopic infrared spectrum and the microscopic spectrogram of the black handwriting samples were processed by chemometrics. Cluster analysis and similarity comparison of microscopic infrared spectra are carried out to distinguish the handwriting of different components. By cluster analysis, 47 of 56 samples can be divided into 6 categories according to their components. The difference of spectrum can be quantified, the microspectrogram is mainly calculated by color difference to distinguish the handwriting of different chroma, and the chromatic difference between two samples is calculated by using the formula of chromatic difference, and a total of 1596 chromatic aberration data are obtained. There are 31 samples whose chromatic difference is less than 1, which accounts for 1.9% of the total sample. By comparing the results of microscopic infrared analysis and microscopic spectroscopic analysis, we can find that there is a large color difference between the samples that the infrared spectrum is grouped into a class. However, the infrared spectrum of the samples with small chromatic difference is quite different, thus 56 black handwriting can be distinguished, which provides a new idea and a new method for the identification of handwriting.
【作者单位】：江苏警官学院技术系;美国布鲁克光谱仪仪器公司北京代表处;
【分类号】：D918.92

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