OESM辅助的高分辨率航空正射影像拼接线自动检测算法

Automatic Seamline Detection Algorithm for High Resolution Aerial Orthoimages with the Auxiliary Orthoimage Elevation Synchronization Model

针对常规拼接线检测算法在城市区域影像镶嵌时容易出现拼接线穿越建筑物从而破坏地物完整性的问题,提出了一种影像高程同步模型(OESM)辅助的拼接线自动检测算法。该算法首先通过对OESM模型规格化处理标识正射影像中的地物目标;然后在非地物目标区利用改进贪婪蛇算法检测拼接线。通过对建筑物密集分布的城市区域影像进行拼接线检测实验表明,该算法是一种理想的拼接线检测算法。

In view of the problem of the conventional seamline detection algorithm, that the seamline prone to pass through buildings will destroy the integrity of the ground feature while mosaicking urban region image, an algorithm of automatic seamline detection with auxiliary OESM is proposed, which exactly extracts ground objects by normalizing OESM firstly, and then an improved greedy algorithm is adopted to quickly detect a seamline in non-ground object areas. The experimental research of urban images in which building distribution is dense shows that the pro- posed algorithm is an ideal seamline detection algorithm.