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Machine Vision Based Automatic Detection Method of Indicating Values of a Pointer Gauge

机译：基于机器视觉的指针规指示值自动检测方法

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摘要

This study proposes an automatic reading approach for a pointer gauge based on computer vision. Moreover, the study aims to highlight the defects of the current automatic-recognition method of the pointer gauge and introduces a method that uses a coawrse-to-fine scheme and has superior performance in the accuracy and stability of its reading identification. First, it uses the region growing method to locate the dial region and its center. Second, it uses an improved central projection method to determine the circular scale region under the polar coordinate system and detect the scale marks. Then, the border detection is implemented in the dial image, and the Hough transform method is used to obtain the pointer direction by means of pointer contour fitting. Finally, the reading of the gauge is obtained by comparing the location of the pointer with the scale marks. The experimental results demonstrate the effectiveness of the proposed approach. This approach is applicable for reading gauges whose scale marks are either evenly or unevenly distributed.
机译：这项研究提出了一种基于计算机视觉的指针式仪表的自动读取方法。此外，该研究旨在突出当前指针指示器的自动识别方法的缺陷，并介绍了一种使用coarrse-fine方案并且在其读数识别的准确性和稳定性方面具有卓越性能的方法。首先，它使用区域增长方法来定位刻度盘区域及其中心。其次，它使用一种改进的中心投影方法来确定极坐标系下的圆形刻度区域并检测刻度标记。然后，在转盘图像中实现边界检测，并使用霍夫变换方法通过指针轮廓拟合获得指针方向。最后，通过将指针的位置与刻度标记进行比较来获得仪表的读数。实验结果证明了该方法的有效性。这种方法适用于刻度尺分布均匀或不均匀的读数计。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第18期|283629.1-283629.19|共19页
  • 作者

    Chi Jiannan; Liu Lei; Liu Jiwei; Jiang Zhaoxuan; Zhang Guosheng;

  • 作者单位

    Univ Sci & Technol Beijing, Sch Automat & Elect Engn, Beijing 100083, Peoples R China|Minist Transport, Key Lab Operat Safety Technol Transport Vehicles, Beijing 100088, Peoples R China;

    Univ Sci & Technol Beijing, Sch Automat & Elect Engn, Beijing 100083, Peoples R China;

    Shenyang Aerosp Univ, Sch Automat, Shenyang 110136, Peoples R China;

    Univ Sci & Technol Beijing, Sch Automat & Elect Engn, Beijing 100083, Peoples R China;

    Minist Transport, Key Lab Operat Safety Technol Transport Vehicles, Beijing 100088, Peoples R China;

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