图象中一种不规则边界圆的参数求取方法

文章提出了一种基于曲线拟合法求取图象中不规则边界圆的参数的求取方法。在进行图象的预处理得到一个不规则边界圆的边界数据点集的基础上,该算法首先引入替代变量,使圆方程拟合法求圆参数成为可能;然后进行圆参数的多次迭代拟合,边拟合边剔除拟合点集中的不规则圆边界点,直到符合终止条件为止,成功地求出了圆参数的最佳估值。试验证明,和传统的广义Hough变换相比,该算法具有运算速度快、自动求取的突出优点,在不规则边界点所占整个圆边界点比例较小时能取得很好的结果。

An Algorithms For Parameters of an Image Irregular Boundary Circle

A new algorithms for parameters of an image irregular boundary circle parameters is presented,which is based on"Curve-Approximate Method".For a set of an image circle boundary points by image pre-processing,this paper firstly introduces an substitute variant to make curve appriximate of an circle possible,then approaches the circle parameters using iteration curve approximate repeatly while picking out the irregular boundary points in all points,until to fit the terminate condition.Finally,It succeeds to get the optimal estimation of parameters of a circle.Examaples Show that the algrithms runs more quicklly and automatically than traditional Generalized Hough Transform,and a good result is obtained if the irregular boundary points is small proportion in all points of a circle.