基于模板匹配的航片框标定位法

针对数字化航空影像提出了一种新的基于影像匹配的框标定位方法。先通过内边缘检测搜索框标所在的匹配窗口,然后采用模板匹配的方式确定框标的概略位置,再依据所有的框标概略位置整体确定模板图像的旋转参数,进而对各框标进行精确的匹配定位。为简化算法,还提出了一种基于数学形态学的框标模板构建方法。实验证明,本算法自动化程度高、稳定、快速。

A Method for Aerial Photo Fiducial Mark Positioning Based on Template Matching

In this paper a new fiducial mark locating method based on image matching was presented, which aim at digitized aerial image. In advance the matching windows including fiducial marks were searched by checking the inner edge. Then the approximate positions of the fiducial marks were fixed on with the means of template matching. And the rotary parameters of the template images were fixed on wholly according as all the fiducial mark approximate positions. Consequently each fiducial mark was matched and located accurately. In order to simplifying the algorithm, a new method by which the fiducial mark was built on mathematic morphology was put forward. Proved by experiments, the algorithm has high automation degree, stability and speediness.