半导体光子学与技术, 2002, 8 (2): 111, 网络出版: 2011-08-11
Subpixel Target Location Techniques for 3-D Coordinate Measuring System
Subpixel Target Location Techniques for 3-D Coordinate Measuring System
摘要
Abstract
The close photogrammetric 3-D coordinate measurement is a new measuring technology in the fields of the coordinate measurement machine (CMM) in recent years. In this method, we usually place some targets on the measured object and take image of targets to determine the object coordinate. The subpixel location of target image plays an important role in high accuracy 3-D coordinate measuring procedure. In this paper, some subpixel location methods are reviewed and some factors which affect location precision are analyzed. Then we propose bilinear interpolation centroid algorithm. The experiments have shown this algorithm can improve accuracy of target centroid by increasing available pixels.
YU Zhi-jing, MA Shu-ying, HUANG Qing-cheng, JI Ru-kai, WANG Qing-zhu. Subpixel Target Location Techniques for 3-D Coordinate Measuring System[J]. 半导体光子学与技术, 2002, 8(2): 111. YU Zhi-jing, MA Shu-ying, HUANG Qing-cheng, JI Ru-kai, WANG Qing-zhu. Subpixel Target Location Techniques for 3-D Coordinate Measuring System[J]. Semiconductor Photonics and Technology, 2002, 8(2): 111.