Photonvision thresholding issue

Technical PhotonVision
1

I’m trying to set up photonvision for the limelight 2 using the 2023.4.2 image.

The thresholding range is very wide for both hue, saturation, and brightness and photonvision still struggles to pick up the bright green (as indicated by the black rectangles on the reflective tape in the processed feed). Has anyone encountered this issue, and how might it be fixed?

Here’s a screenshot:

image
image2296×1466 303 KB

2

Sorry, not a solution:
I’ve been having the exact same issue, pretty much waiting for someone to post about this. (idk why I haven’t myself, nor made an issue on their github). The weird thing to me is that it works just fine locally on windows.
I never solved it, so I switched back to using limelight software a few days ago. It only took about 5 mins. They both accomplish the same task, limelight software seems to be more stable (ex: this), and fps seemed to be better in my experience, though I’ve seen people say performance is the same or better using PhotonVison.

If this ever gets solved I wouldn’t mind switching back to it.

3

Weird! I have sometimes been able to reproduce this at my house with my Pi. It seems to happen less with less green targets? Def a thresholding shader bug

4

I assume something isn’t broken (no code bugs or poor camera - the camera is working evenly across its entire field).

I’ve fixed this thresholding problem with one or more of these changes to settings:

  1. Less bright light (my best guess of what’s wrong - blowing out the exposure)
  2. Lower the exposure except if light is reduced you may have to increase the exposure
  3. Play with brightness
  4. Increase the blur
  5. Lower the resolution
5

Yeah, I think there is a fundamental code bug on our end in this case, coz I’ve seen another report about Very Green targets blowing out our HSV thresholding GPU shader somehow. I had trouble debugging it though, still looking for the actual problem. Good tips in the meantime tho!

6

thanks for the tips, though I do think it’s a bug, as the green is pretty consistent and the threshold is really wide. I think I’ll just go with as what one of the other people said, just switch to the limelight software.

7

Pardon my ignorance - I have an older version of PhotonVision and have used it mostly for AprilTags. But why don’t your yellow threshold bars’ endpoint circles match the values printed to the left and right of the colored threshold areas? The ranges of the digital values are relatively small and apparently don’t include the full field of green values.

8

I also just noticed that but when I had it installed I moved all sliders in the range 0-255 and the problem was still there.

9

That’s really interesting, I’m not sure. I’ve flashed my limelight with the limelight software so I’m not sure if I can reproduce this issue