Build Tiled Mesh Model: Null Point Cloud

[shiukaheng]

Hi, I'm currently working with a LIDAR dataset, which I've meshed and textured in Metashape using the quick_layout.py script (metioned here: https://github.com/agisoft-llc/metashape-scripts/blob/master/src/quick_layout.py directly using ground station locations instead of using images for alignment). Problem is when I try to created a tiled model, it gives me a "null point cloud" error window and nothing else. I'm sure my region is set correctly and covers my whole model and dense cloud. I speculate perhaps the function expected a sparse cloud there? Would there be any solutions? Thanks a lot in advance.

[Alexey Pasumansky]

Hello shiukaheng,

What processing settings you are using for tiled model generation?

[shiukaheng]

I didn't get to the point where that window opens up. Clicking build tiled model directly leads to the error message.

[Alexey Pasumansky]

Hello shiukaheng,

Ok, understood. Can you please check, if you can workaround the problem by calling Tools Menu -> Tie Points -> Build Points command and proceed with low/lowest accuracy?

[shiukaheng]

The images are not good enough to align the photos, it just gets aligned very incorrectly. Would there be another workaround? Thanks

[Alexey Pasumansky]

Hello shiukaheng,

If you use Build Points command (not Align Photos!) the interior and exterior orientation parameters will be preserved, so it should only generate the tie point cloud which should allow to define the reconstruction volume and run Build Tiles Model operation.

[shiukaheng]

Sorry for missing that! Just tried it but it lead to a new "Tie points" property, but with 0 tie points. Now the error is "Null point cloud points". The matching time for my 215 spherical panoramas is a reasonable 20ish minutes, but when I view the matches there are no key points / matches visible for the images at all. Am I still missing something? Thanks.

[shiukaheng]

Bump

[shiukaheng]

Is there no workaround other than trying to use the photo data for reconstruction? I am still failing to align the images correctly, even with a lot of tie points.. Any help is appreciated, thanks.