公开(公告)号：US09857172B1

公开(公告)日：2018-01-02

申请号：US15714070

申请日：2017-09-25

申请人： Beijing Information Science and Technology University

发明人： Mingli Dong ,  Peng Sun ,  Wei Li ,  Jun Wang ,  Bixi Yan ,  Naiguang Lv

IPC分类号： G06K9/36 ,  G01C11/10 ,  G01C11/14 ,  G06T7/80 ,  G06T7/77 ,  G06T3/40 ,  G06T7/73 ,  G06F17/18

CPC分类号： G01C11/10 ,  G01C11/14 ,  G06F17/18 ,  G06T3/40 ,  G06T7/75 ,  G06T7/77 ,  G06T7/85 ,  G06T2200/21

摘要： The present invention provides a method for implementing high-precision orientation and evaluating orientation precision of a large-scale dynamic photogrammetry system, including steps: a) selecting a scale bar, arranging code points at two ends of the scale bar, and performing length measurement on the scale bar; b) evenly dividing a measurement space into multiple regions, sequentially placing the scale bar in each region, and photographing the scale bar by using left and right cameras; d) limiting self-calibration bundle adjustment by using multiple length constraints, adjustment parameters including principal point, principal distance, radial distortion, eccentric distortion, in-plane distortion, exterior orientation parameter and spatial point coordinate; and e) performing traceable evaluation of orientation precision of the photogrammetry system. The present invention can effectively reduce the relative error in length measurement.