书写速度对电磁式触屏电子签名笔迹特征的影响

Effect of Writing Speed on the Handwriting Characteristics of Electromagnetic Touch Screens for Electronic Signatures

为了研究不同书写速度下电磁式电子签名笔迹特征的变化规律,选取40名实验人员采用坐姿形式在水平桌面上分别用慢速、常速、快速书写电子签名,并对收集到的签名采用数据统计、速度压力颜色映射图、压力曲线方法进行分析。通过形态学检验可知,改变速度前提下签名的静态特征主要在书写水平、字间距、转折部位形态、连笔数量、字体方面发生变化。签名的动态特征在书写速度由慢到快改变时,签名的平均压力减小、抬笔次数减少。因此,在鉴定电子签名时应考虑书写速度对电子签名特征的影响,尽量收集速度相同相近的签名样本。当检材和样本上签名笔迹的书写速度存在差别时,要运用书写速度对电子签名笔迹特征影响的规律去分析研究特征,并综合运用静态、动态特征,以提升鉴定的准确性。

To investigate the changing rules of electromagnetic signature handwriting characteristics at different writing speeds,40 experimenters were selected to write electronic signatures on a horizontal table in a seated form using slow,constant,and fast speed,respectively.The signatures were collected and analyzed using data statistics,speed-pressure color mapping,and pressure curve methods.According to morphological test,the static features of signature under the condition of changing speed mainly changed in writing level,word spacing,turning part morphology,number of consecutive strokes,and font.As for the dynamic features of the signature,the average pressure of the signature and the number of pen lifts decreased when the writing speed changed from slow to fast.Therefore,the impact of writing speed on the characteristics of electronic signatures should be considered when identifying electronic signatures,and signature samples with the same or similar speed should be collected as much as possible.When there were differences in the writing speed of the examination material and samples,the law for the impact of writing speed on the characteristics of electronic signature handwriting should be used to analyze and study the characteristics,and the static and dynamic characteristics should be comprehensively used to improve the accuracy of identification.