Camera setup failing Lens Configuration

[bhdavis]

I’ve read just about everything I can find in the forums but still can’t get camera calibration to find the markers. As in the images below you’ll see I get a 0 Markers Found result no matter what I try.

This is a generic USB camera (showing flipped left/right on screen) mounted directly above the laser. Just to try and get a successful calibration shot, not being concerned with actual table location for now, I’ve put the pattern on top of a box sitting on the laser shroud. This gives me the 1/9 image coverage on the dotted pattern.

Both patterns shown are downloaded recently from the Lightburn website.

I’ve tried both regular and fisheye lens settings with the same results.

Can someone tell me what I’m missing?

Thanks,
BH

[MikeyH (Mike Hembrey)]

@bhdavis

mounted directly above the laser. Just to try and get a successful calibration shot,

No camera on mine, but I do know the distance affects the calibration. If the distance changes, the calibration must be redone.

It also appears your view is too wide of an area. It should be the workspace only, meaning the camera might need to be closer.

Hopefully a camera user will jump in and edit any mistakes.

[bhdavis]

Thanks. Moved the camera closer but same results.
BH

[NicholasL (Nicholas Leqeta)]

Did you select the appropriate calibration pattern before you started the process?:

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When using the AprilTags pattern try using the newer wizard:

Right-click in Camera Control window and select Calibrate Camera Lens with Tag Tracking (Labs)

Calibrate Camera Lens (Labs) - LightBurn Documentation

[bhdavis]

No, did not select circles. Both tries were done with the AprilTags 6x9. That you for point that out. I’ll give it a try with the circles and report back.

If that doesn’t do it I’ll try:

Right-click in Camera Control window and select **Calibrate Camera Lens with Tag Tracking (Labs)

Thanks for posting the suggestions.
BH

[bhdavis]

THANK YOU !!!

I hadn’t noticed the CIRCLES option and once I selected it and put the camera within 10" of the plate that did the trick.

I’ll proceed and see what I manage to get for results. Initial configuration shot scores were around 0.23 with a GREAT comment next to them.

BH

[bhdavis]

Okay. Good headway but still not there. Got a good lens calibration of 0.43 and hit NEXT. Then nothing happens. I tried numerous times and NEXT gets grayed out while CANCEL, BACK and CAPTURE buttons all remain active. But it stays on the lens calibration screen. I’ve even left it for several minutes with no change.

I’ve done it with HONEYCOMB CHECK enabled and disabled with no change. It seems to hang on this screen.

I tried closing the LENS CALIBRATION screen with CANCEL and opened the ALIGNMENT wizard. It says I have to do the lens calibration first so that step isn’t being saved if I cancel out.

Thanks,
BH

[bhdavis]

Problem solved. I didn’t realize it wanted to take 9 images. I misunderstood and thought that was from an older version of the software. Got it working now.