基于近景单影像的房檐改正计算方法  

Computation Method of Eave Correction Based on Single Close Range Image

作　　者：张剑清[1] 王强[1] 

机构地区：[1]武汉大学遥感信息工程学院

出　　处：《武汉大学学报（信息科学版）》2007年第12期1091-1094,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40301041)

摘　　要：介绍了利用地面获取的单幅房屋近景影像计算房檐改正值的方法。该方法使用数码相机倾斜影像和房屋外观的几何约束条件,根据交比不变与透视旋转原理,确立了灭点、物方直线段与影像投影直线段之间的关系,并由此计算房檐宽度。实验结果表明,该方法能够满足实际需求。A method for computing the value of eave correction by using the single close range image of a building is introduced. In the method the digital lean image and the conditions of geometry and restriction of the framework appearance of building are used. According the cross ratio invariability and perspective reversion, the relation among the vanishing points, the spatial beelines and their projections in image is determined, and the width of the eave can be calculated. Experimental results show that it meets the requirements.

关 键 词：房檐改正 灭点 交比不变 透视旋转 

分 类 号：P231.5[天文地球—摄影测量与遥感] P234.1[天文地球—测绘科学与技术]