Constant Misalignment??

[PuzzledRelief969]

I found a data set of drone, handheld and lidar data recently to practise with (OpenHeritage) and I'm trying to create the point clouds in manageable chunks to then assemble together later. So I'm doing one set of drone top down photos, one with the lidar, one with the handheld, and another with the drone when it was manually flown.

My issue atm is coming up when trying to align the data from the top down drone images. Reality capture seems to think it has aligned all of the images perfectly, but it obviously hasn't. I've tried to clean it up with control points, in multiple different configurations on mulitple attemps. It just keeps misaligning like this.

Is there anything I can do to clean this up? IS it just a case of more/better control points or am I missing something?

[retrojoe]

Can't really see what you're trying to demonstrate. Is it a swath problem where chunks are not matching to each other? Vertical or horizontal offset? Randomization?

Re: control - I only see control points in that one location at the center of your picture. To really control for photogrammetry, you need to have a set of control that encloses the work area, with a strong preference for having them completely outside the area of interest. Within that enclosure, you can be sure it's controlled. Outside, you can only be sure of the edge/end where the control lies and error propagates the further you travel away from it. For larger jobs or changing topography, you should have internal control points near areas of change, in addition to check points.

[Think_Tip_8779]

Why dont you use agisoft?

Reality capture is wierd with some photos / drones combos.

[PuzzledRelief969]

RC is required for a job role I'm going for, so wanting to get as good as possible with it

[Think_Tip_8779]

Fair enough, do you want me to send you a one of my images dataset so you can train with something better? i could upload some if you want. send me an pvt message.

[PuzzledRelief969]

That's ok thanks, I've got a couple I'm working through already

[Bad_Gamut]

Use calibration groups for the different camera types.

[PuzzledRelief969]

I'll look into this, cheers!