利用对数函数获取正射立体影像对的方法

Orthophoto Stereo Images Pair Acquiring Method Based on Logarithm Function

数字正射影像没有三维立体信息,对地物陡坎高度或沟渠深度不能量测,探讨引入对数函数生成投影光线,通过数字微分纠正的方法,制作立体辅助影像,并与原正射影像共同构成立体正射影像对,构建与实地相似的几何模型进行立体量测,获取地物高度信息,解决城市建设等单位的实际需求。最后给出了实验结果,并对其量测的高差成果也进行了检测。

Because the digital orthophoto elevation model(DOM) lacks height information, the height of steep slope or the depth of channel can't be measured. The artificial introduction of logarithm function projection of generating aided stereo images and establishing stereo orthophoto pairs with original DOM based on the digital differential rectification method were discussed, which can build similarity geometric model, measure height information on the model surface, and provide solutions on practical application for city construction department. At last, the result of stereo orthophoto pair was given and the precision of height survey was also checked in this paper.