I have undertaken a drone survey of a graveyard to map grave plots and am having trouble removing overlying vegetation. There are a number of areas in the graveyard where trees or ivy are covering underlying grave plots in the orthomosaic that I have generated in Pix4D.
Below is an extract of the orthomosaic.
It can be seen in the clipped point cloud below that there is a grave plot almost completely obscured by the tree in the top of the image and another against the ruins of the church which is completely obscured by ivy in the lower left quadrant of the image.
I have tried editing the point cloud, however, having successfully removed the vegetation from the densified point cloud, Pix4D puts back a lot of the overlying vegetation when generating the orthomosaic, see below.
I have also tried regenerating the 3D textured mesh after having edited the point cloud and again, although both the point cloud and the textured mesh have the vegetation removed, when the orthomosaic is produced the vegetation is reinserted.
Any Help would be greatly appreciated!!