This paper puts forward a new method of roundness measurement based on digital image processing techniques. The concept of mutex balance in physics is introduced in the proposed method. In the experiment, it makes the central point move in accordance with the overall repulsion of circle pixels group and pixel group angular correction in linear iterative way until the central point stops in the dot which overall repulsion from circle pixels group is zero. That dot is the center point we want for. It is demonstrated that the acquired dot and component roundness using this method approximate the results from traditional from noncontact measurement. The proposed method can be applied in measuring roundness in practice. Furthermore, it contributes to the future research of roundness measurement from a new perspective and innovative method.%提出一种新的基于数字图像处理的圆度测量方法.通过引入物理学的互斥力概念,以线性迭代的方式基于圆环像素群综合斥力移动准圆心点,并附加像素群角度修正,使其停止在受圆环像素群综合受力为零的点,该点即为文中方法所求圆心点.理论分析和实验验证了使用此方法获取的圆心点及零件圆度均与传统非接触测量测量结果相近,可应用于实际的圆度测量工作,也为未来的圆度测量研究提供一种新思路和新方法.
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