历史航片特殊框标的自动内定向算法  

Automatic interior orientation of historical aerophotograph with special fiducial marks

作　　者：王琳[1] 陈楚[1] 吴正鹏[1] 

机构地区：[1]天津市测绘院,天津300381

出　　处：《测绘科学》2014年第12期148-150,154,共4页Science of Surveying and Mapping

摘　　要：内定向是摄影测量的一个基本问题,其中框标位置的近似确定是最重要也是最困难的工作。当框标不是对称形式且淹没在背景当中,框标与影像叠置在一起,传统的灰度匹配方法已不再适用,文章主要研究此种情况下的自动内定向,采用影像二值化、区域生长法分割影像、边界跟踪将框标所处的线特征提取出来,进行线特征匹配,最终实现框标的自动识别与定位,其自动内定向成功率达到了98%以上,在实际生产中得到推广与应用。The interior orientation is the basic issue of photogrammetry, of which the approximate position determination of fiducial marks is the most important and difficult work. The traditional gray matching method is not applicable when the fiducial marks are mixed in the background texture of the images with unsymmetry characteristic. To solve this problem, this paper studied the automatic interior orientation by adopting image binarization, region grow, boundary tracking and line match to locate the position of fiducial marks. The result had been widely used in practical production with the success rate over 98%

关 键 词：内定向 区域生长 边界跟踪 灰度匹配 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]