直角坐标型书写机器人摹仿签名笔迹研究  

Probing into Cartesian-coordinate Writing Robot about Its Imitative Signature Handwriting

作　　者：国中正 陈维娜[1] 杨求凤 韩惠斌 GUO Zhongzheng;CHEN Weina;YANG Qiufeng;HAN Huibin(People’s Public Security University of China,Beijing 100038,China;Institute of Forensic Science,Ministry of Public Security,Beijing 100038,China;Criminal Science and Technology Institute of Weifang Public Security Bureau,Weifang 261041,Shandong,China)

机构地区：[1]中国人民公安大学,北京100038 [2]公安部物证鉴定中心,北京100038 [3]潍坊市公安局刑事科学技术研究所,山东潍坊261041

出　　处：《刑事技术》2022年第2期149-155,共7页Forensic Science and Technology

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(2020JB024);中央高校基本科研业务费项目(2021JKF214)。

摘　　要：目的 探究直角坐标型书写机器人摹仿签名笔迹的书写原理、笔迹特征以及书写机器人参数设置对笔迹特征的影响。方法 收集签名笔迹和机器人摹仿签名笔迹,借助VSC8000、RTI等仪器设备观察总结两者的异同。结果 机器人摹仿签名笔迹是利用贝塞尔曲线设计笔迹路径并转化为G代码指令从而控制机器人书写形成的,机器人摹仿签名笔迹与签名笔迹相比,概貌特征、局部安排特征和写法特征保持高度一致,搭配比例特征、笔画重复特征、笔顺特征、运笔特征以及笔痕特征存在差异;加速度和速度参数设置过大会导致笔画抖动;随着笔压参数增大,笔痕逐渐变深后保持不变,收笔随着笔锋参数和笔压参数的增大而增长。结论 机器人摹仿签名笔迹与签名笔迹的书写原理以及笔迹特征均存在差异,具有鉴定的可行性。Objective To explore the operational principle of Cartesian-coordinate writing robot about its imitative signature handwriting and related characteristics on which how to consequently influence with the robot’s parameter setting. Methods The personal man-made signature handwritings and those of the writing robot were collected, having been observed into the characteristics of the robot’s imitative signature handwritings with the help of instruments(i.e., VSC8000 and RTI here). Results As the robot’s imitating signature handwriting is designed on Bezier curve and consecutively converted into G instructional code to control the robot to carry out writing, a highly consistency exists between the robot’s imitating signature handwriting and the one of personal man-made about their general features, local arrangements and writing-regulated features, yet the differences being present among their allocable proportion, repeated strokes, stroke order, pen’s running route and marks. Strokes’ jitter will result from the larger parameter setting of acceleration and speed. With the pen pressure-parameter augmenting, the pen marks maintain from gradual deepening to remaining unchanged. The pen’s closing stroke is to elongate along with the pen pressure/stroke parameters augmenting. Conclusions There are essential differences present in writing principle and handwriting characteristics between the robot imitative signature handwriting and the one of personal man-made, laying a feasibility for identifi cation about such kind of signature handwriting.

关 键 词：文件检验 摹仿签名 书写机器人 笔迹特征 

分 类 号：DF794.2[政治法律—诉讼法学]