基于直线段检测的SIM卡槽图像中切割线定位算法

Cutting Line Detection for SIM Card Slot Images Based on Line Segment Detection

针对由视觉引导激光切割手机卡(Subscriber identification module,SIM)卡槽的需求,提出了一种检测特定位置直线段边缘结构的算法。该算法充分利用图像梯度模值和方向信息,将图像中相邻像素梯度模值差值作为寻找种子点时的判定条件,同时将图像中相邻像素梯度角度差值作为区域增长的判定条件,以此得到直线段候选区域,然后利用图像梯度模值作为权重拟合直线段。实验证明该算法具有检测精度高、鲁棒性好、计算量小的优点,可以满足工业检测的应用需求。

In order to cut subscriber identification module(SIM)card slot via laser cutting with coaxial visual sensing system,this paper presents an algorithm for detecting the specific straight lines.This algorithm makes full use of the gradient magnitude and direction information,and selects the seed points based on the difference of gradient modulus values between adjacent pixels.Then the line support regions are found via growing a region from the seed points using gradient angle measure.The line segment can be determined based on the gradient modulus values of pixels in the line support regions.The numerical experiments demonstrate that the proposed algorithm has super performance of high detection precision,good robustness and low calculation cost,thus meeting the application requirements of industry detection.