光学精密工程2019，Vol.27Issue(1)：34-44,11.DOI:10.3788/OPE.20192701.0034
基于立体定向靶标的探针式多视场三维视觉测量系统
Probe-based multi-view field 3D vision measurement system based on three-dimensional orientation target
摘要
Abstract
To meet the shape measurement of a polyhedral or rotary body, whose surface includes shadowed areas, deep holes, or grooves, aprobe Multi-View Field (MVF) 3 Dvision measurement system based on 3 Dorientation target was proposed.We introduce the structure and principle of the vision measurement system.First, based on close range photogrammetry, six element models of the orientation target were built and the local coordinates of the corners in each model were obtained.Based on the above results, stitching six element models and bundle adjustments were further used to calculate the precise global coordinates of all corners.Next, aprobe with assistant locating coplanarcorners was designed and close range photogrammetry technology was used to compute the precise coordinates of the coplanar corners and probe head in the probe coordinate system.Finally, using the homography matrix between the coplanar chessboard corners and its image plane, the position and orientation between the global or probe coordinate system and camera were derived, respectively, by which the global coordinates of the probe head were determined.Taking the standard length of the gauge block and length bar as the evaluation index, accuracy better than 0.1 mm was achieved in a field of 2 m × 1.5 m.The real experiment to measure 3 Ddata was performed on a kettle, whose shape has the characteristics of a rotating body, and the results demonstrate that the MVF 3 Dvision measurement system can acquire point clouds in all areas of the kettle surface.关键词
三维视觉测量/立体定向靶标/探针/多视场/近景摄影测量/单应性矩阵Key words
3Dvision measurement/three-dimensional orientation target/probe/multi-view field/close range photogrammetry/homography matrix分类
信息技术与安全科学引用本文复制引用
李云雷,张曦,屠大维..基于立体定向靶标的探针式多视场三维视觉测量系统[J].光学精密工程,2019,27(1):34-44,11.基金项目
国家自然科学基金资助项目 (No.41376169, No.61673252, No.51205243) （No.41376169, No.61673252, No.51205243）
