Most of the current pointer meter reading schemes are only for meters with uniform scale distri-bution,only extracting certain key points and not extracting each scale line,and this scheme is not appli-cable to meters with non-uniform scale lines.In this paper,we propose a scale line extraction algorithm that can be applied to non-uniform scale line pointer meters,this algorithm firstly uses Canny edge detec-tion algorithm with different thresholds to extract edges from the image,so as to obtain multiple edge ima-ges,and extract all the contours that satisfy the set conditions in the edge image,and then removes over-lapping and redundant contours by using a method similar to the NMS,and finally finds out the real scale line frame by using the scale filtering and sorting algorithm to find the true scale wireframe.This algorithm eliminates the cumbersome steps in the deep learning program,and only needs to set the appropriate pa-rameters to achieve good scale line extraction,fast,easy to port,and very suitable for the actual needs of engineering.
关键词
指针仪表/刻度提取/图像处理/Canny边缘提取/外接矩形框
Key words
point ermeter/scale line sextraction/image processing/Canny edge extension/external rectan-gular frame
维普
万方数据