Warning: "Images sizes do not match" when W&B logging enabled

[glenn-jocher]

@AyushExel training with W&B logging enabled in Colab notebook I get some strange warning messages (which are printed in incorrect English):
https://colab.research.google.com/github/ultralytics/yolov5/blob/master/tutorial.ipynb

Default training

W&B Logged training

This message is not originating within the repository. Can you take a look at this and try to figure out what is happening? Thanks!

[github-actions]

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[AyushExel]

@glenn-jocher It's from here in the client. It is a warning about how the images of different sizes might not be displayed correctly in the same panel. I think this warning is raised because the size of test images is different from mosiacs(?) This should not cause any problem here because we're using different panels for mosiacs/metrics and the test images.

I'll have exact details shortly

[glenn-jocher]

@AyushExel ok I see. We probably want to suppress this warning then so as not to worry users and improve our overall UI/UX. I did something similar today with a Seaborn warning when plotting empty confusion matrices. This uses a context manager to ignore warnings for certain sections of the code: #3576

[glenn-jocher]

@AyushExel any updates on this? I searched our issues and it seems this problem has been present since December 2020, first reported in #1676 about 2000 issues ago.

I think at the minimum if a fix in the W&B codebase (ideal solution) is not possible quickly then you should place the ops that cause this (presumably somewhere in utils/wandb_logging) under a warning suppression to prevent this from displaying to screen.

[AyushExel]

Oh yeah, I forgot to update you on this. Client fixes take time so I'll wrap it under a warning suppression.

[glenn-jocher]

@AyushExel awesome, thanks!

[glenn-jocher]

The code I've used before for this is:

import warnings

with warnings.catch_warnings():                
    warnings.simplefilter('ignore')
    # code that produces warning

# normal code

[AyushExel]

@glenn-jocher client uses logging.warning("message") so this doesn't work. I'm trying this - https://stackoverflow.com/a/60448982/8253860

[AyushExel]

Okay, that didn't work. I'm trying a hacky way. PR up shortly.

[AyushExel]

@glenn-jocher fix here -> #3611

[glenn-jocher]

@AyushExel I'm getting this warning still today in Colab, it does not seem to be resolved. Can you look into this please?

If there is a problem we need to fix it, else we need to suppress this message, those are our only two options here.

[glenn-jocher]

@AyushExel training without wandb installed in Colab I verify no warnings, so I believe they originate in W&B:

[AyushExel]

@glenn-jocher looking at the source, I think I know where these are getting generated. We need to enclose all wandb.Image logging operations in the context manager that suppresses the message. I'm on phone now, I'll push a fix tomorrow

[glenn-jocher]

@AyushExel awesome thanks for the quick response!