最小传递路径的正射影像色彩一致性处理方法

针对区域范围内多幅正射影像之间色彩不一致问题,设计了一种基于重叠区域的正射影像匀色方法,提取正射影像的有效区域外部轮廓并进行多边形拟合,利用Wallis滤波器根据有效区域的重叠区域进行处理。为了减小多次匀色造成的积累误差,提出一种结合Voronoi图和Dijkstra算法的方法确定最小传递路径。最后,通过相应实验验证了最小传递路径的正射影像色彩一致性处理方法的有效性。

Color Consistency Processing of Orthoimages Based on the Minimum Transfer Path

In the light of the problem of the color difference among multiple orthoimages in a large area,a method of color consistency processing based on the overlapping region is designed.The outer contour of the valid region in the orthoimage is extracted and fitted to a polygon.Then the image is processed based on the overlapping region of the valid regions using the Wallis filter.In order to reduce the accumulated error caused by multiple color consistency processing,an algorithm combining Voronoi diagram and Dijkstra algorithm is proposed to search the minimum transfer path.Finally,the validity of the proposcd method is demonstrated by experiments.