一种利用物方定位一致性的多光谱卫星影像自动精确配准方法

提出了一种基于物方定位一致性的卫星多光谱影像自动配准方法。首先采用类似于相对定向的方式恢复各波段影像间精确的相对几何成像关系;然后基于同名像元物方定位一致性的约束条件,在无需影像匹配的情况下实现子像素级的多光谱影像自动配准。该方法是一种真正几何意义上的配准,波段间的纠正模型为严密几何成像模型,不仅在理论上具有严密性,而且配准结果与影像质量无关。为了验证本文方法的正确性和可行性,对资源三号卫星的多光谱影像进行了实验。目前该方法已应用于卫星影像预处理软件中。

A Registration Method Based on Object-Space Positioning Consistency for Satellite Multi-spectral Image

This paper proposes a registration method based on object-space positioning consistency for satellite multi-spectral images.The method includes two steps: restoring the precise band-to-band relative geometric imaging relationship by adopting a method similar to relative orientation,and realizing automatic registration with sub-pixel accuracy without image-matching using the constraint conditions of object-space positioning consistency of the homologous image points.The method uses a rigorous geometric imaging model as the rectification model,achieving true geometric registration and is theoretically strict.The results,furthermore,have no relationship with the image quality.In our experiment,ZY3 satellite multi-spectral images are tested to demonstrate the feasibility and correctness of our method.This method has been successfully applied in the satellite image pre-processing software.