摘要
在视觉测量中,为提高轴类零件尺寸测量的鲁棒性,基于平行线拟合提出了一种快速高精度的轴类零件几何尺寸视觉测量方法。平行性约束提高了该方法的抗噪能力,增强了工业测量装置对环境的适应性。首先基于模板匹配,快速找到了感兴趣区域(ROI)。然后根据Ransac算法,利用被测对象两边缘直线各自内点建立平行线方程组,并基于最小二乘法进行非线性优化,从而获取被测对象所占的像素数。在与传统算法进行对比的仿真实验中验证了所提方法的抗噪能力。最后,搭建了远心测量平台,对阶梯轴轴颈的几何尺寸进行测量,验证了所提方法的有效性与可行性。
To enhance the robustness of size estimation for shaft parts in visual measurements, this paper proposes a fast and high-precision vision measurement method for shaft part geometric dimensions based on parallel line fitting.Parallel constraint improves the noise resistance of the proposed method and enhances the adaptability of the industrial measuring device to its environment. First, a region of interest(ROI) was quickly found based on template matching. Then, a parallel line equation was established using the Ransac algorithm for the interior points of the two edge lines of a measured object. Additionally, a nonlinear optimization was performed based on the least square method to obtain the number of pixels occupied by the measured object. In the simulation, the anti-noise performance of the proposed method was verified by comparing it with traditional algorithms. Finally, a telecentric measuring platform was built to measure the shaft neck size for a stepped shaft. The results showed the effectiveness and feasibility of the proposed method.
作者
李文杰
王海旺
李团兴
张宗辉
邓仕超
檀正东
高兴宇
Li Wenjie;Wang Haiwang;Li Tuanxing;Zhang Zonghui;Deng Shichao;Tan Zhengdong;Gao Xingyu(Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology,School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,Guangxi,China;Shenzhen Anewbest Electronic Technology Co.,Ltd.,Shenzhen 518000,Guangdong,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第10期351-357,共7页
Laser & Optoelectronics Progress
基金
广西科技基地人才专项(2018AD19077)
广西创新驱动发展专项基金(桂科AA18118002-3)
广西自然科学基金(2018JJA170110)。
关键词
机器视觉
平行线拟合
远心测量
machine vision
parallel line fitting
telecentric measurement
