喷墨打印机重启对网点形态特征的影响

Effects of the Restart of Inkjet Printer on the Shape Feature of Dots

喷墨打印机普及使得喷墨打印案件的增多。在检验中,出现率和使用率较高的特征就是网点形态特征。通过不同时间间隔重启打印机后网点形态变化的实验,探究重启打印机后网点形态特征的稳定性和变化的出现率高低,结果发现重启后网点形态变化的出现率较高,稳定性较差。网点形态变化主要体现在数量和位置上。因此在鉴定中,网点形态不一致并不是同一认定否定结论的充分条件;若网点形态一致,且其他特征都符合,可以得到同一认定的结论。

The popularity of inkjet printer has made inkjet printing cases increase.In the examination,shape feature of dots is one of the features with high occurrence and usage.The stability of shape features of dots and occurrence rate of changes after restarting the printer are explored by the experiments on the change of shape features of dots after restarting the printer at different time intervals.It was found that the occurrence rate of shape features of dot after restarting was relatively high with poor stability.The changes of shape features of dot are mainly amount and position.Therefore,in the examination,inconsistency of dots shape is not the sufficient condition of denying the sameness.If the dots shapes are consistent and meet with other features,they could be identical.