基于人工视差法的立体正射影像对量测精度分析

Measurement precision analysis of stereo orthoimage pairs based on the artificial parallax method

引入投影光线产生人工视差有固定角度、变角度平行投影和对数投影等方法。通过引入投影光线函数制作辅助影像,可与DOM共同构建实地相似的立体正射影像模型,量测地貌高程。本文从理论上,讨论利用这三种投影函数制作辅助影像求解建筑物比高的方法。通过实验证明,在平坦地区,构建的立体正射影像模型,量测建筑物比高与原航空影像立体模型比较接近。

Several methods can be employed to introduce the projection light to generate artificial parallax,such as fixed an-gle parallel projection,variable angle parallel projection and logarithmic projection.Different projection light are introduced to generate artificial parallax,produce auxiliary images and construct stereo orthoimage pairs with DOM,which can generate stereo geometric model similar to the field and obtain landform elevation through observation and measurement.This paper theoretically discusses the method of using the three projection functions to make auxiliary images to solve the building height ratio.The exper-imental results prove that the measured building height ratio of the stereo orthoimage model constructed by these three methods is close to that of the original aerial image stereo model in the flat area.