Geometric parameter measurement based on image sequence
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摘要: 随着测量技术的不断发展，现代工业对物体尺寸检测的准确性及快速性要求越来越高。文中提出了一种利用序列图像来测量物体几何尺寸的方法。使用数码相机获得标定模板的序列图像，通过直接线性变换（DLT）方法来标定相机内部参数，结合透镜成像的知识，对使用数码相机采集到的物体序列图像进行处理和测量，最终计算出物体的宽度和高度。实验证明，该方法简单实用，能够克服传统测量方式的缺点，并且快速获得较为准确的结果（误差控制在1%以内），满足工业测量的要求。Abstract: With the continuous development of measurement technology, modern industry imposes a high demand on product dimension measurement accuracy and speed. This paper presents a method to measure the objects by using image sequences. A digital camera was used to capture calibration template image sequences, and the camera intrinsic parameters were obtained by direct linear transformation (DLT) method. Combined with the knowledge of imaging lens, the object-s image sequences provided by digital camera were processed and measured, and the object-s width and height were calculated ultimately. Experiments show that the method is simple and practical, which overcomes the shortcomings of traditional measurement and could control measurement error within 1%.
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Keywords:
- image sequence /
- image measurement /
- DLT calibration /
- corner detection /
- digital camera
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［1］马忠丽，刘宏大，王显峰. 虚拟测量平台的开发与应用［J］. 应用科技，2002，29(11)：36-38
MA Zhong-li, LIU Hong-da, WANG Xian-feng. Development and application of dummy measure flat ［J］. Applied Science and Technology,2002，29(11):36-38.(in Chinese with an English abstract)
［2］冀芳. 高精度图像测量技术［D］. 西安：西安电子科技大学，2007.
JI Fang. High accuracy image measurement technique［D］.Xian: Xidian University,2007.(in Chinese)
［3］冯卫东.工业零件形状尺寸图像检测技术研究［D］.长沙：国防科学技术大学,2002.
FENG Wei-dong.The research of shape and size of industrial parts of the image detection technology［D］.Changsha: National University of Defense Technology,2002. (in Chinese)
［4］宋振跃. 基于机器视觉的小范围精密测量技术研究［D］.沈阳：沈阳工业大学.2009.
SONG Zhen-yue. Mini-area precise measurement technology based on machine vision［D］. Shenyang: Shenyang University of Technology,2009. (in Chinese)
［5］张尧禹，张明慧，乔彦峰．一种高精度非接触位置测量系统［J］．光学精密工程，2001，10(2):41-44.
ZHANG Yao-yu, ZHANG Ming-hui, QIAO Yan-feng. High-precision noncontact position measuring system［J］. Optics and Precision Engineering, 2011，10(2)：41-44. (in Chinese with an English abstract)
［6］马颂德，张正友.计算机视觉［M］.北京：科学出版社,2003.
MA Song-de, ZHANG Zheng-you.Computer vision［M］.Beijing：Science Press,2003.(in Chinese)
［7］HEIKKILA J，SILVEN O. A four-step camera calibration procedure with implicit image correction ［J］. IEEE Computer Society Conference on Computer Vision and Pattern Recognition, San Juan, Puerto Rico, 1997,17-19：1106-1112.
［8］ABDEL A, KARARA Y I. Direct linear transformation into object space coordinates in close-range photogrammetry ［C］. Urbana: Univ of Illinois Urbana Champaign,1971：1-18.
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