一种新的匹配法在指针式仪表自动判读系统中的应用

Application of a New Matching Method in Automatic Reading System of Index-instrument

  • 摘要: 在指针式仪表自动判读系统中,首先需要对要判读的表盘图象与模板之间进行匹配,以确定所要判读的仪表类型与量程。传统的模板匹配算法对于图象的几何变形(伸缩、旋转)具有很差的抗干扰性,而圆周划分匹配法对图象旋转具有一定的抗干扰功能,但精度不高。文章在圆周划分匹配法的基础上提出了圆环匹配法,该方法采用圆环像素求和、计算特征值进行匹配。实验结果证明,圆环匹配法具有较强的抗旋转干扰能力、更高的匹配精度和良好的实用价值。

     

    Abstract: In automatic reading system of index-instrument,image of dial plate needed be read must match template in order to decide type and range of instrument needed be read.However,traditional template matching algorithm has bad antiinterference ability for geometric distortion dilation,rotation of image. Circle partitioning matching method has certain anti-interference ability,but low matching accuracy.The paper proposed loop matching method on the basis of circle partitioning matching method,which used picture element of loop to calculate sum and calculate characteristic value to realize matching.The experiment result showed that the loop matching method has good anti-interference ability,better matching accuracy and good practical application value.

     

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