刑事技术2023，Vol.48Issue(6)：563-569,7.DOI:10.16467/j.1008-3650.2023.0052
基于笔痕角度特征对高水平机器人书写字迹的识别研究
Research on Recognition of High-level Cartesian Robotic Writing Based on Stroke Angle
摘要
Abstract
Whether the suspicious handwriting is written or not is the key in the handwritirg examination,which directly determines the conclusion.The traditional methods of forging handwriting,inclicding printing,copying and stamping,are easy to identify,because there are no stroke pressure.But the advances in robotic writing technology pose new challenges for forensic document examiners.Robotic writing can form three-dimensional stroke indentation,and it is easy to misjudge the handwriting formed by normal writing in the examination.Some researchers have modified the Cartesian writing robot to make its handwriting more natural,and more similar to the handwriting written by human,which is difficult to distinguish.Forensic document examiners should be alert to this kind of high-level forged handwriting.In this study,by utilizing the optical tomography and depth-of-field technology of AB 8000 handwriting quantitative tester,we measured the strokes of natural handwriting samples and high-level robotic writing samples,and obtained the width and depth of stroke,calculated the ratio i of the horizontal distance between the deepest mark and the edge of stroke and the width of stroke ink.We alsa measured the distribution degree of i value by chart and differential value operation,and analyzed the aggregation and fluctuation of the mark angles between high-level robotic writing samples and human handwriting samples.The results showed that the stroke angle of high-level robotic writing samples has high aggregation and low volatility,while the stroke angle of human writing samples has low aggregation and high volatility.Therefore,it is verified the validity of stroke angle feature in recognizing the robotic writing.It is also observed in the experiment that the stroke angle of long strokes is more stable,and the angle data of turning strokes and crossing strokes will be disturbed,so it is more accurate to choose long strokes for measurement.关键词
文件检验/高水平写字机器人/书写字迹/笔痕角度Key words
forensic documents examination/high level Cartesian writing robot/handwriting/stroke angle分类
政治法律引用本文复制引用
杨求凤,韩星周,王晓光,秦达,闫海倩,郭姿含,郝红光,王锦生..基于笔痕角度特征对高水平机器人书写字迹的识别研究[J].刑事技术,2023,48(6):563-569,7.基金项目
中央级公益性科研院所基本科研业务费专项资金项目(2022JB002) （2022JB002）
