古建筑高精度正射影像图的制作

THE MAKING OF HIGH PRECISION CLOSE RANGE ORTHOIMAGE

提出了基于分层三角网的顾及物体之间遮挡关系 ,同时引入相对控制条件 ,使用纹理贴面技术制作高精度正射影像的方法和实现技术。在 Virtuo Zo数字摄影测量软件中据此开发了相应软件模块 ,从而实现了香港志莲净苑大雄殿正立面影像图的制作。

Traditionally, orthophotos or orthoimages are made on the basis of regular grid DEM, which implies that the terrain surface is smooth. But as for close range photographs of buildings, the hypothesis of smoothness is no longer right. And the hiding relations between object surfaces exist here and there. This paper puts forward a method of producing accurate orthoimage of buildings, which is based on TINs and context mappimg. With this method, hiding relation can be considered exactly and relative constrain conditions can be included.