基于ImageJ的卷烟包灰值定量测定方法优化

Optimization of the quantitative determination method of the burning cigarette ash integration based on ImageJ

为提高基于ImageJ的卷烟包灰值测定方法的准确度和重复性,分别从卷烟燃烧面选择、燃烧灰柱高度及图像选择区域宽度三方面对该方法进行优化研究,形成了如下方案:(1)当烟支燃烧至距离接装纸1cm处时进行拍照;(2)采用高度25mm、宽度6.46 mm的矩形选择框以灰柱底部为起点选择图片区域进行分析;(3)取3支卷烟、3个燃烧面(正对、背对、侧对搭口面)的平均值为一次测量结果。该方案较好控制了卷烟纸搭口、灰柱弯曲、外翻灰片等对测量结果的影响,因而测量结果可以更全面地反映卷烟的裂纹情况,重复性也得到了改善。与改进前相比,4个参试样品重复测量结果的RSD由26.18%~34.52%下降到了15.3%~20.6%。

In order to improve the accuracy and repeatability of the integration quantitative determination method based on ImageJ for the ash from the burning cigarette.,an optimized scheme was conducted in this study.The scheme was optimized from three aspects,including the selection of cigarette combustion surface,the selected height as well as the width of the burning cigarette columnar ash.The established optimal scheme was as follows：（1） Taking pictures of the burning cigarette when it was burned to 1 cm away from the tipping paper.（2） Using a height of 25 mm,6.46 mm width rectangular box to select the bottom of the gray column as a starting point for analysis of the picture area.（3） The final result of the ash integration was taken from the average of three cigarettes and three burning surfaces（the surface,opposite face and the side face of lapped cigarette paper）.This program could weaken the influence of the lapped cigarette paper,the curvature of the ash as well as the outer ash on the repeatability of measurement results.In addition,this optimized method could reflect the true ash integration character more comprehensively.The application of this method indicated that the RSD of the four samples reduced from 26.18% - 34.52% to 15.3% -20.6%,suggesting a significant improvement in accuracy and repeatability.