I hoped camera calibration/alignment would improve with the 1.7 release. But I can’t get the new April Tags detected at all. Not a single one. I’ve printed them in A4 A5 A6 and held them at different distances, angles and orientations and also varied lighting in the room. Still not a single april ta…

Would you be able to post a screenshot or two of what your camera is capturing when you try to use the AprilTags? It might provide clues for us to determine how you can get a good capture. When you attempt to calibrate the AprilTags, it is not necessary to mount the camera in the machine to perform…

Thanks for the helpful suggestions. I will update with screenshots later. But the image looks quite similar to those on the doc page and in its youtube video. The calibration attempts I described (successful with circles, unsuccesful with april tags) were performed with the lid open and the camera …

[image] krono: The calibration attempts I described (successful with circles, unsuccesful with april tags) were performed with the lid open and the camera pointed out into the room It’s likely that this particular laser requires the lid to be closed before running lens calibration and camera …

[image] berainlb: It’s likely that this particular laser requires the lid to be closed before running lens calibration Can you say more why you think that is the case? The official video https://www.youtube.com/watch?v=A1ctQdbyn7A shows a fisheye lens camera calibrated with lid open. As I wro…

[image] krono: Can you say more why you think that is the case? I may have misunderstood what step you were attempting and overstated the limitation. If you are only attempting the lens calibration then that can be done with the lid open if you are hand holding the pattern card. However, the …

Yes, alignment is done with lid closed. I think the issue I’m experiencing is wholly due to the calibration step, so I’ll set aligment aside here. [image] berainlb: Are you placing the pattern on the bed only or have you tried holding and positioning so that the pattern is visible at the reques…

[image] krono: Do you recall what megapixel value its camera has and what end result you got from that in the outer corners? Would help me put my 8mm issue in perspective. I don’t recall specifically. Omtech’s site lists 5MP for their current offering. This was done in January of this year so…

Thank you for that useful feedback. Reading more on the Omtech Polar it seems very similar to Gweike Cloud Pro so perhaps they even use the same model of 5 MPX camera. I’ll have time to experiment some more with calibration next week. I will then also try to borrow a different fisheye camera to tes…

[image] krono: Omtech Polar it seems very similar to Gweike Cloud Pro Not sure if anything’s changed on this but at the time the Polar was released it was fairly well understood to have been OEMed from Gweike. There are some implementation differences I assume either by specification or for c…

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V1.7.03 Camera calibration issue: April Tags not detected (circles detected)

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