基于几何约束的街景单像定位方法

Street View Single Panorama Positioning Method Based on Geometric Constraint

针对现有的街景兴趣点定位方法存在操作复杂或者设备昂贵等问题,提出一种基于几何约束与单幅全景影像的快速定位方法。车载平台下全景相机中心到地面的垂距是定值,可以作为单像测量中的长度参考。把场景中的水平面、竖直线与竖直面三种结构作为几何约束,与全景中心到球面像点的投射光束相交便可以对兴趣点进行直接地理定位。实验证明,该方法简单高效,且结果能够满足兴趣点采集的精度要求。

In order to solve the problems that the existing POI positioning methods in street view have complex operations or need expensive equipment,this paper proposes a fast positioning method based on geometric constraint and single panorama.The vertical distance from panorama camera to ground is a fixed value in vehicle-borne platform,which can be a reference length in monocular measurement.For the purpose of getting objects＇ geographical location,the method uses horizontal plane,vertical line and vertical plane as geometric constraint to intersect with the light projected from panorama＇s center to image point.Experimental result proves that the method proposed in this paper is simple but effective,and has sufficient accuracy to meet the requirement of gathering interest point.