This work investigates the reliability of the function called ‘regionprops’ which is used for measuring the 2D length of the plasma discharge. Work was conducted in a Rotating Gliding Arc ( RGA ) reactor, using air as plasma forming gas. Arc rotational images at three different gas flow rates i.e. 5, 25 and 50 litres per minute ##IMG## [http://ej.iop.org/images/2516-1067/2/3/035008/prexabae49ieqn1.gif] {$\left({LPM}\right)$} were captured using high speed camera with an exposure of 100 μ s. A total of 6799 images from all the three flow rates were considered for analysis. The 2D length of the discharge was measured by two methods namely, (a) ‘regionprops’ function (Python) and (b) manual tracing (ImageJ). The 2D arclength measured using ‘regionprops’ function matched very closely to that measured by manual hand tracing technique using ImageJ tool. A linear relation between both the methods was observed for all the three flow rates, with the coeff...

中文翻译：

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使用“ regionprops”功能验证旋转滑行电弧等离子体的投影长度

这项工作研究了称为“ regionprops”的功能的可靠性，该功能用于测量等离子体放电的二维长度。使用空气作为等离子体形成气体，在旋转滑弧（RGA）反应器中进行了工作。以三种不同的气体流量（即每分钟5、25和50升）的电弧旋转图像## IMG ## [http://ej.iop.org/images/2516-1067/2/3/035008/prexabae49ieqn1.gif] {$ \ left（{LPM} \ right）$}使用高速相机拍摄，曝光时间为100μs。考虑来自所有三个流速的总共6799张图像进行分析。放电的2D长度通过两种方法测量，即（a）“ regionprops”函数（Python）和（b）手动跟踪（ImageJ）。使用“ regionprops”功能测得的2D弧长与使用ImageJ工具通过手动手迹技术测得的2D弧长非常匹配。