霍夫变换算法在圆心视觉定位中的应用研究

The Application Research of Hough Transform Algorithm on Circle Center Vision Positioning

在图像处理中霍夫变换常被用于直线及圆检测。传统的霍夫变换运算速度慢,难以满足实际应用中对圆检测快速性的要求。提出了一种改进的霍夫变换快速圆检测算法,通过分析圆周点与邻域内其他点的位置关系,判断出圆周边缘的凸凹性及圆心方向;并以圆弧中心线的累加结果确定了圆周的圆心。通过新算法在液体自动化灌装系统中的应用,实现了视觉系统对桶口的快速识别与定位,验证了算法的有效性与快速性。

Hough transform algorithm is often used to detect lines and circles. The traditional HT algorithm can＇t meet the need of practical application on fast circle detection for its slow algorithm operation. A new im- proved HT algorithm of fast cirlce＇detection is presented by analyzing the location relationship of points on the circle and their neighborhoods, the convexity-concavity of the circle edge and the cirlce center direction can be judged, and the circle center point can be obtained by accumulating the circular arc center lines. With the use of new algro- rithm on liquid aromatic filling system, the fast recognition and position on bunghole is realized by the vision sys- tem, the rapidity and validity of the new algorithm is verified.