基于数字图像处理测量直线度的方法研究

Research on a method of measuring linearity based on numerical image processing

近年来,数字图像处理与计算机视觉领域中诸多研究成果被用于测量,进而发展成为一类新兴的测量方法——计算机视觉检测技术。本文主要研究基于数字图像处理技术进行非接触测量的方法。针对轴类零件直线度的测量,首先对CCD摄像机采集到的图像进行图像处理,然后利用Canny算子对处理后的图像进行边缘检测,最后运用轴线拟合法测量直线度。该方法具有很好的实时性,可以实现在线式非接触测量。通过实验证明,使用轴线拟合法测量轴类直线度,可以进一步提高测量精度。

Recently detection technology based on computer vision is a new measurement method combined numerical image process and computer vision achievements. It is applied to measurement field. The paper mainly measures linearity of shaft parts. At first, we processes image collected by CCD camera. Then use Canny operator to detect edge. Finally, measure linearity using axes fitting method. The experiments test that axes fitting method to measure shaft linearity can improve measurement precise. It is real time and can realize on-line untouched measurement.