一种分层的航空影像匹配算法

A Hierarchical Aerial Photography Matching Algorithm

结合数字地球中航空影像的特点，着重解决匹配中的3个问题，提出了基于坡的影像匹配算法。该方法以影像中的一行数据为单元，首先根据其灰度波形图将其划分为若干一级坡和二级坡，对一级坡进行精确匹配；然后根据顺序一致性约束对二级坡进行匹配；最后对坡内的点进行匹配。实验结果表明，该方法具有较高的稳定性和较快的匹配速度。

An algorithm is proposed which is combined with the specialty of aerial photography in the ＂digital earth~ and focuses on solving the three problems in image matching. This method disposes the data line by line. Firstly, the gray-value wave is divided into some grade-one-slope and grade-twoslope. The grade-one-slopes are matched at first and then the grade-two-slopes are matched under the ordering constraints. And at last the points in the slopes are matched. Experimental results show that the method has high stability and matching-speed.