航天正射影像路桥扭曲变形自动检测方法OACSTPCD

Aiming at the problem of road and bridge distortion commonly existed in the production of high resolution satellite orthophoto image,we proposed an automatic detection method of road and bridge distortion assisted by image incidence parameters.Firstly,we used the road vector to determine the direction of road,and obtained the sampling points equidistant.Then,we used the image incidence parameters and the reference digital elevation model(DEM)to calculate the point consistency offset ratio between the sampling points.The larger the ratio,the greater the probability of road bridge deformation near the point,and thus the road bridge deformation area is determined.The experimental results show that the proposed method can quickly and accurately locate the suspected deformation area with high degree of automation,and its efficiency is 10 times higher than that of manual verification.