Hello,
I have a UAV surveying made with a DJI M300 that successfully pass the aerotriangulation process, but at the reconstruction step it generates a 3mx mesh with holes in it.
the zone is difficult because it does not have enough visual features to extract keypoints, as you can see in the block AT result:
The question is how can I improve this keypoint extraction. I have changed the keypoints settings to high but it seems that it is not enough.
Regards,
Does this acquisition contain nadir imagery only? If so it may help if you add more images take at an oblique angle. You are right that this is more than likely caused by the lack of texture in that area....
You could try adding mesh constraint.
According to help:
Geometry constraints ContextCapture uses this data as a soft constraint in the reconstruction process: a reconstruction constraint is used only if there is no other reliable data in the area: wherever reliable 3D information can be inferred from input photos, it will override the reconstruction constraint.
Ignore this notice from help as it is no longer true - Geometry constraints are available only in ContextCapture Center Edition
Thanks for your answer, but how can I get a mesh constraint if this area was never mapped before?
Hi, this is not an option without going to the site once again, I wasn't expecting this issue on CC so I don't have access to the site anymore.
I'm processing this in Metashape just to get some sort of backup and it seems to be better in those areas:
You could cheat a litle bit or import the points as pointcloud from metashape.
Isn't the photos there overexposed so no automatic tie points are found?
Also have you tried reconstruction setting to fill all holes and try larger tiles so the holes are not near tile borders?