利用三角网遮蔽检测进行真正射影像制作

True Orthoimage Generation Based on Occlusion Detection with TIN

针对传统正射影像建筑物倾斜、重影等问题,提出了一种基于三角网遮蔽检测的真正射影像制作方法。该方法以三角形为检测单元,通过对三角形进行视觉排序来进行遮蔽区域的检测;采用权值影像的方式,利用相邻影像的可见部分对遮蔽区域进行纹理修补,生成真正射影像。实验结果表明,所提出的方法能够准确地检测出影像遮蔽区域,生成的真正射影像完整、无遮蔽。

To the problems about building tilt and ghost image on traditional orthoimage,a novel method for true orthoimage generation based on occlusion detection with TIN（TOGODT） is proposed.The triangle is the dectection unit in this method.Occlusions are dectected by visual sorting of triangles,and occlusion areas are repaired by visible parts of the neighbor images which are treated as weighted image.The experimental results show that this method can accurately detect image occlusion areas,and the generated true orthoimage is complete and has no occlusion.