基于Voronoi图无人机影像快速拼接方法研究

UAV Images Rapid Mosaic Method Based on Voronoi Diagram

为实现大序列城市高分辨率无人机影像的快速拼接,提出了基于Voronoi图的快速拼接技术。以平顶山80幅分辨率为0.1 m的无人机影像为例,先用直方图匹配进行影像间匀光,用反解法数字微分进行正射纠正,再以像主点为中心快速生成测区Voronoi图拼接线网络,最后基于拼接线网络快速拼接。实验结果表明,基于Voronoi图拼接线网络进行城市高分辨率无人机影像拼接,能有效避免中心投影造成的影像边缘较大的投影差,快速获得城市高分辨率正射影像全景图。

Aiming at the rapid mosaic of large sequence urban high resolution UAV images, a new technique for images rapid mosaic based on Voronoi was presented. In this paper, taking eighty images of 0.1 m resolution ratio from Pingdingshan for example, we used the histogram matching to unifier ray and color of those images, and obtained the result of ortho-rectification based on the reverse solution to digital differencing. Finally, taking principal point of photograph as the central point, we generated rapidly the Voronoi image stitching wire mesh. With the mesh, we got the mosaic image. The experimental result shows that the technique can rapidly generate the panoramagram of urban high resolution orthophoto, and avoid the projection difference of image edge caused by central projection.