Reading recognition method of analog measuring instruments based on improved hough transform

IEEE 2011 10th International Conference on Electronic Measurement & Instruments Pub Date : 2011-10-10 DOI:10.1109/ICEMI.2011.6037919

Han Jiale, L. En, Tao Bingjie, Lv Ming

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引用次数: 42

Abstract

To effectively resolve the automatic recognition problem of analog measuring instruments, a reading recognition method based on improved Hough transformation is proposed. Firstly, the paper presents the image preprocessing operation. In order to make the image filtering better, an improved adaptive median filter method is adopted. Secondly, we explains in detail the recognition principle for the pointer angle using the improved Hough transform. And the pointer's reading is got using the linear relationship between scale and angle of instrument dial revolutionary. In order to further improve the recognition accuracy, as to the situation that pointer completely coincides with the whole tick, late correction will be done. Finally, the automatic recognition software is written in VC++6.0 IDE, and complete the recognition experiment for the AC voltmeter. The experimental results show that the method is very valid for the pointer angle recognition. In addition, the advantages of this study are as following: simple algorithm, good real-time and high precision.

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基于改进霍夫变换的模拟测量仪表读数识别方法

为了有效解决模拟测量仪器的自动识别问题，提出了一种基于改进霍夫变换的读数识别方法。首先介绍了图像的预处理操作。为了使图像滤波效果更好，采用了一种改进的自适应中值滤波方法。其次，详细阐述了改进的霍夫变换对指针角度的识别原理。利用刻度与表盘旋转角度之间的线性关系得到指针的读数。为了进一步提高识别精度，对于指针与整个刻度完全重合的情况，将进行后期校正。最后，在vc++ 6.0 IDE环境下编写了自动识别软件，并完成了对交流电压表的识别实验。实验结果表明，该方法对指针角度的识别是非常有效的。此外，本研究还具有算法简单、实时性好、精度高等优点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE 2011 10th International Conference on Electronic Measurement & Instruments

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