I hadn’t previously tried the april tags so tried it today after reading your post. I had no particular problem getting the tags to be detected so it’s not something inherent in the version of LightBurn so likely something either in your equipment or in the environment. I know you’re still struggling through the extreme fisheye but I’m surprised to hear that attempting the lens calibration outside the machine makes no difference at all.
Ideally you’d be in bright diffuse light… think a bright but overcast day with no harsh shadows.
Looking at your captures, though, the conditions don’t seem too bad. To me the position and relative sizes would be more the issue which should be remediated by hand-holding and fine-tuning the position.
Even in that case, using the shift and scale adjustments may be able to marginally improve overall accuracy.
The image is captured prior to correction. So if that portion of the image is missing it will show as a void post correction.
Yes. This seems fine.
This gives me hope that the capture can be done. If you can try with the image at varying distances to the camera that may improve things.
By the way, I wasn’t in ideal conditions when I did the april tags test and my end results were worse than what I already had with previously done circle pattern. I could not get scores consistently below .3. I typically aim for .1.
I believe at one point there was talk of attempting a live correction system. I trust that there’s a lot of effort being put into this and even the existing recent changes represents a ton of effort. Improvements are surely to come but this is all non-trivial. Keep in mind that an entirely new custom camera system was also being developed for Mac during this time and that small changes to the system end up affecting some users due to the vast amount of variation in hardware and systems.
If you have specific additional suggestions it’s worth documenting in the Feature Request portal.
Not sure if I have any more suggestions for you but try importing this calibration file. It was done on an Omtech Polar. If they are sufficiently close this may work. Make sure to take a backup of your existing calibration so you can go back to it if necessary. I recall this one being off by a couple of millimeters in alignment but the lens calibration may be okay.
omtech_polar_camera_setttings.lbcm (756 Bytes)