Tracking camera calibration not progressing

Troi

Hello, I tried to calibrate the tracking camera using a 4x7 checkerboard with side lengths of 4 cm. I launched voxl-portal to view the camera calibration overlay. Then I placed the checkerboard in various positions and orientations within the red box overlayed on the tracking camera image. However, the calibration process does not progress. I never receive a green (overlay) box and the process remains at 0%.

What should I do to solve this issue?

Command used:
voxl-calibrate-camera tracking -f -l 0.04 -s 4x7

I followed the calibrate camera instructions from here: https://docs.modalai.com/calibrate-cameras/.

plub

@Troi same issue here but with stereo camera and command:

voxl-calibrate-camera stereo_front -s 6x9 -l 0.030

Did you resolve this?

Alex Kushleyev

@plub ,

Can you provide any more details? Are you able to start the camera calibration and view the camera images using voxl-portal ?

Are you sure that you are using a correct type of the checkerboard (correct number of corners)?

Alex

plub

@Alex-Kushleyev What do you mean by "start" the camera calibration? I've used command which i have pasted in previous post. Then i was able to see camera calibrator tool and images from stereo cameras. Red rectangles showed up but when i placed the chessboard inside them, nothings happened. I am using checkerboard recommended by you: 9x6 OpenCV chessboard. I've tried various combinations in front of the camera but calibration didn't started.

thanks for trying to help

Piotr

Alex Kushleyev

@plub , sorry for the delay. By start the calibration, I meant launch the voxl-calibrate-camera app and view the calibration stream via voxl-portal (it seems you have it working).

Is it possible for you to paste a video of a screen recording while you are doing the calibration (screen record the voxl-portal stream).

Thank you

Alex