The research for precise determination the global center position of double olsen samples base on Hough tranform
基于Hough变换的双球冲球心精确定位技术研究

Double olsen test is commonly used to examine the materials' mechanical properties.Double olsen's shape is quite complex and it is composed of inter and outer circles which have no same center.To precisely and quickly determine its round center,the Hough transform was adopted to obtain sample's contour for determining the sample position in the image base on hardware location.An advanced Hough transform was developed by narrowing the parameter range of radius and center of circle with the help of prior experience.It reduced resource consumption greatly and improved the running speed and precision.