I have a weird problem with Pix4DMapper. I have a series of about 200 oblique aerial photos of an airport area. I want to create a point cloud from that (eventually, a mesh).
However, when I create the point cloud, I have lots of artifacts especially on plane surfaces. You can see in this image:
The white surface (some concrete) is not flat, but instead has many points along the red arrow. It seems that the plane is too homogeneous to be clearly distinct. Then in the epipolar planes the points are assumed to be closer (and further away) since they do not match correctly.
When you look at the point cloud from the angle of the cameras, it looks very nice. But when you look at it in from the side, it looks like this.
I already tried reducing the number of images up to every tenth and increasing the number of required matches to six, but to no avail.
Does anyone know what I could do with this data to get a clean point cloud? This mainly affects homogeneous areas like the concrete or untiled building roofs. Note that this problem occurs not only with this one series, but I have seven of those. All shot with the same camera, but at different angles and heights, still the same.