长江科学院院报2017，Vol.34Issue(5)：86-91,6.DOI:10.11988/ckyyb.20160189
土工离心模型试验位移测量中的图像校正
Image Calibration of Displacement Photogrammetry inGeotechnical Centrifuge Model Test
摘要
Abstract
In the condition of oblique photographic angle or defective camera lens,the pictorial location of test model could contain slant or distorted deviation,which could further affect the accuracy of photogrammetry.In the aim of reducing the effect of slant and distorted deviation on photogrammetry,the relationship between two dimensional model coordinate and image coordinate was derived according to perspective principle.Furthermore,an image correction method was established by introducing image distorted deviation into perspective transformation.Intrinsic parameters of digital camera were calibrated by photogrammetry of a standard grid,which also showed that this method could achieve a metrical precision of 2‰.The method was applied to image calibration and displacement measurement of a geotechnical centrifuge model test,and the deviation of calibrated coordinate was less than 1mm,and has 5% or less influence on the displacement measurement.关键词
离心模型试验/摄影测量/图像校正/透视变换/位移测量Key words
centrifuge model test/photogrammetry/image calibration/perspective transformation/displacement measurement分类
建筑与水利引用本文复制引用
刘怀忠,肖明砾,谢红强,卓莉..土工离心模型试验位移测量中的图像校正[J].长江科学院院报,2017,34(5):86-91,6.基金项目
四川大学试验技术立项项目(2015-124) （2015-124）
