写字机器人伪造签名字迹的鉴别

目的通过实验研究使用写字机器人伪造的签名字迹特征,减小文件检验鉴定中的错判风险。方法以真实书写字迹为模板、使用市面上主流款式的写字机器人执不同种类书写笔进行书写,通过直接观察、显微观察、反射变换成像(RTI)方法观察等方式比对手写字迹和机器人书写字迹的差异,归纳写字机器人伪造字迹的主要特征,总结出有效的检验鉴别方法。结果通过研究发现写字机器人伪造签名笔迹的特点主要有起收笔为顿压笔,笔画出现细微的抖动歪曲现象,整体笔画笔压均匀,运笔生硬无笔势等。结论目前写字机器人伪造签名字迹与真实手写字迹还有一定差异,使用反射变换成像(RTI)方法观察能达到较好的检验效果。

Identification of Forged Signature from Writing Robot

Objective With advent of the writing robot that is able to imitate human handwriting and personal signature,the writing-robot-forged signature is sometimes encountered for forensic identifi cation.The characteristics of signature forged from writing robot are different from those of the real man-made,thus capable of building up a creditable foundation for the involving identifi cation.Here,the experimental research was to conduct on the characteristics of writing-robot-forged signature so as to help reduce the misjudgment in the relevant document examination and identifi cation.Methods Taken of the real man-made handwriting as template,one mainstream market-sold writing robot was selected to imitate the template to produce its writing with different pens that were also used by people to write the same words as those made with the writing robot.The comparison was carried out between the two kinds of written words through direct naked-eye and microscopic observation plus the refl ection transformation imaging(RTI)scrutiny.From the main differences summarized between the two kinds of handwriting,an effective examination and identifi cation into document was to sum up.Results The characteristics of writing-robot-forged handwriting were mainly shown as:1.The combinatorial characteristics of single words are highly consistent.2.The stroke order of a single word is exactly same.3.The signature is almost reproduced with high fi delity.4.The starting a nd ending strokes keep a constant pressure.5.Some strokes will appear distorted and shaken.6.The overall strokes are even.7.The movement of the used pen is rigid and less of gesture.Conclusions There is a signifi cant difference between the writing-robot-forged handwriting and the real man-made.Refl ection transformation imaging(RTI)should be used for observation to achieve a better identifi cation effect.