质心法在航空影像框标定位中的应用  

Application of centroid method to fiducial mark positioning of aerial photo

作　　者：李烁[1] 王慧[1] 闸旋[1] 

机构地区：[1]信息工程大学测绘学院,河南郑州450052

出　　处：《测绘工程》2013年第5期71-74,共4页Engineering of Surveying and Mapping

摘　　要：航片框标定位的精度直接影响摄影测量测图的质量,传统的基于影像匹配的框标定位算法精度只能达到像素级。文中提出一种模板匹配与质心法相结合的航片框标定位方法,先利用模板匹配进行概略定位,再利用质心法进行框标点的精确定位,将精度提高到亚像素级。实验证明该方法可以有效地提高精度。Precision of fiducial mark positioning of aerial photo directly affects the quality of the photogrammetric mapping, but precision of traditional algorithm based on image matching for fiducial mark positioning can only reach the pixel level. It presents an algorithm that integrates template matching and centroid method for fiducial mark positioning of aerial photo. After rough positioning byuse of template matching, the fiducial mark is precisely positioned with centroid method in order to improve the precision to the sub-pixel level. Experiments show that algorithm is effective.

关 键 词：框标定位 模板匹配 质心法 内定向 

分 类 号：P231[天文地球—摄影测量与遥感]