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《Proceedings of the CSEE》 2007-07
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Study on the Recognition of Pointer Position of Electric Power Transformer Temperature Meter

SUN Feng-jie,AN Tian-jiang,FAN Jie-qing,YANG Chun-ping,XU Zheng(North China Electric Power University,Changping District,Beijing 102206,China)  
The temperature meter of power transformer is considered as the key component to monitor the running state of it,and the image recognition technology can be used as one of the effective methods to get the reading of temperature meter.The process of digital image processing and identifying the position of the transformer temperature meter-pointer is expounded in this paper,the recognition flow is designed,then the analysis and compare of image processing algorithms in the process of identifying different types of meter-pointer are given.Be aimed at the flaw of the direct hue matching in segmenting pointer image under the good illumination condition,and the characteristic that the transformer temperature meter has the images of red and black pointers,a new method is put forward,the main color extracting,which is applicable for identifying pointer area under bad illumination condition.Experimentations have proved that this method has advantages in many aspects,such as computing simply,strong applicability and perfect processing result,and it can establish the basic for identifying pointer position and computing the pointer reading.
【CateGory Index】: TM41
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