Re: Calibration issues

[Andrew Straw]

Hi Elhanan,

(Sorry for my slow response.)

I don't have any great idea. My only suggestion is to plot your 2D data with the braidz viewer or your own script to confirm the data is still "clean".

-Andrew

On Wed, Dec 8, 2021 at 1:02 PM Elhanan Ben Yishay <elha...@gmail.com> wrote:

Hi Andrew,

I have some weird calibration issues, maybe you could help me with:

I accidentally bumped one of the cameras and had to do a re-calibration. However, for some reason, I'm getting crazy high (>100px for some cameras, >10px for all) reprojection errors. I've tried to redo the checkerboard calibration for all cameras, and it doesn't seem to make a difference. I also tried to use an older version of Braid (0.10 instead of the most recent 0.11), but it doesn't make much of a difference.

I've done this process of calibration many times before and always had really great values (<0.5px), and I have no idea what could be the issue now. I've redone it a few times already the past couple of days, including completely changing the positions of some of the cameras, but the best reprojection error values I'm getting are around the 10s.

Do you have any advice about how to troubleshoot this? I have not yet tried to do it with the apriltag system, although that might be my next step.

Thanks,

Elhanan

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