摘要
针对目前玻璃料滴常规称量方法测量效率低且受环境影响较大的问题,提出一种基于双目视觉的非接触式测量方法.搭建双目视觉系统,对采集的图像进行滤波去噪和特征轮廓提取,基于融合料滴图像梯度信息的Census变换立体匹配算法得到边缘信息完整的视差图.分别分析发生相机平面方向偏转和相机景深方向偏转的料滴对水平切片法精度的影响,首先采用最小外接矩形算法对发生相机平面方向偏转的料滴进行校正,然后利用视差信息修正发生相机景深方向偏转的料滴,最后基于水平切片法累加水平切片获得料滴体积及质量.实验结果验证,该方法对发生空间偏转的料滴也能达到精度标准,能够满足玻璃瓶生产的需求.
Given that the conventional method of weighing glass gobs has a low measurement efficiency and is greatly influenced by the environment,this study proposes a non-contact measurement method based on binocular vision.For this purpose,a binocular vision system is built to filter and de-noise the collected images and extract their feature contours.A disparity map with complete edge information is obtained with the Census transform-based stereo matching algorithm integrating the gradient information of the gob images.The influences of gobs deflecting along the directions of the camera plane and the camera depth of focus,respectively,on the precision of horizontal slicing are analyzed.Specifically,the minimum bounding rectangle algorithm is utilized to correct gobs deflecting along the direction of the camera plane.Then,disparity information is used to correct gobs deflecting along the other direction.Finally,horizontal slices are accumulated through horizontal slicing to obtain the gob volume and mass.The experimental results show that the proposed method also reaches the precision standard on gobs with spatial deflection and it thus meets the demand of glass bottle production.
作者
方陈
邹光明
侯宇
刘源泂
肖洒
许家旺
FANG Chen;ZOU Guang-Ming;HOU Yu;LIU Yuan-Jiong;XIAO Sa;XU Jia-Wang(Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《计算机系统应用》
2022年第8期402-407,共6页
Computer Systems & Applications
基金
国家自然科学基金(51874217)
湖北省技术创新专项重大项目(2018AAA027)。
关键词
双目视觉
立体匹配
特征融合
偏转校正
水平切片
三维重建
binocular vision
stereo matching
feature fusion
deflection correction
horizontal slice
3D reconstruction
