alignment problems with UAV imagery

I recently installed a 3.97mm lens on my GoPro. Unfortunately, the results with this new, supposedly “distortion free” lens are even worse than with the stock GoPro lens.

The fisheye GoPro images typically produced a severely “bowed” model in RealityCapture unless using “division” alignment and “high” detector sensitivity, and even then the results didn’t look as accurate as the same photos processed in Photo-Scan with the fisheye parameters or with calibration specific to the GoPro.

This is what I’m getting with the new lens, a total mess:

The subject of the photographs is a flat beach and coastline. The same photos aligned without issue in other photogrammetry software tests, are there some settings I can tweak in RC to get it working?

Alignment settings:

Hi brennmat
Use these settings for ALIGNMENT, delete the existing COMPONENTS and start from scratch:

Alignment_settings_80k.jpg

Wishgranter wrote:

Hi brennmat
Use these settings for ALIGNMENT, delete the existing COMPONENTS and start from scratch:

Alignment_settings_80k.jpg

Still no luck…

Any insight on this? I find it hard to believe that Photoscan had no problem aligning the images and RC is unable to…

Regardless of whether I use Division (I found this worked best for stock GoPro) or Brown3 or any of the other alignment algorithms, RC can’t align the images correctly. Are there some other settings I can experiment with?

Here’s what it looks like in PS: