基于反射变换成像技术对同种笔添改字迹的检验  

Handwriting Alteration Detection with the Same Pen Using Reflectance Transformation Imaging Technique

作　　者：孙林杰 陈维娜[1] Sun Linjie;Chen Weina(School of Investigation,Peoples Public Security University of China,Beijing 100038,China)

机构地区：[1]中国人民公安大学侦查学院,北京100038

出　　处：《激光与光电子学进展》2025年第2期126-134,共9页Laser & Optoelectronics Progress

基　　金：中国人民公安大学刑事科学技术双一流创新研究专项(2023SYL06)。

摘　　要：为解决法庭科学文件检验领域中的添改字迹问题,首次采用反向变换成像(RTI)技术以多种模式呈现同种墨迹交叉笔画的三维特征,用于检验同种类型笔书写字迹的笔画交叉时序。首先制作十字交叉、倾斜交叉、点位交叉三种样本,并分成“先横后竖”和“先竖后横”两类,每类制作50个样本。随后利用RTI技术对1200个样本进行成像检验,利用检出率来反映不同RTI模式检验各类样本的效果。最后在法线可视化模式下,基于样本种类对检出率进行方差分析(ANOVA)。初步实验结果表明:圆珠笔、中性笔在十字交叉样本和倾斜交叉样本中的检验效果最好,检出率高达95%,在点位交叉样本中检出率为70%;秀丽笔、纤维笔在十字交叉样本和倾斜交叉样本中检验效果也较理想,检出率分别为85%和65%,但是在点位交叉样本中检验效果一般,检出率仅为25%。在笔画检验效果最佳的法线可视化模式下进行单因素ANOVA,发现样本种类之间的检出率具有显著差异。RTI技术为文件检验方法体系的补充和丰富提供新的可能性,在文件检验领域具有广阔的发展前景。To address the issue of handwriting alteration in the field of court scientific document examination,we employ reflection transformation imaging(RTI)technique to capture the three-dimensional characteristics of cross-strokes in handwritten characters.The proposed method allows us to examine cross-stroke sequences from the same type of ink across multiple modes.First,we create three types of samples:cross-crossing,tilt-crossing,and point-crossing,dividing each into two categories based on stroke order:“first horizontal then vertical”and“first vertical then horizontal”,with 50 samples in each category.Second,1200 samples are imaged and analyzed using the RTI technique to evaluate the detection rates of various samples under different RTI modes.Analysis of variance(ANOVA)is then performed on the detection rates in normal visualization mode.Preliminary experimental results show that the ballpoint pens and neutral pens exhibit the best test effectiveness in cross-crossing and tilted-crossing samples,with detection rates of up to 95%.Show pens and fiber pens also perform well in these categories,with detection rates of 85%and 65%respectively.But their detection effect decreases in point-crossing samples,with a detection rate of only 70%for ballpoint pens and neutral pens,and 25%for Show pens and fiber pens.ANOVA reveals notable differences in detection rates between sample types in normal visualization mode.RTI technology offers new opportunities for enhancing document inspection methods and shows promising potential for future development in this field.

关 键 词：反射变换成像 添改字迹 文件检验 笔画交叉时序 

分 类 号：O436[机械工程—光学工程]