Setup

You should be able to start a virtual environment using Poetry using this command:

pip install poetry
poetry shell

Then you can install the packages using this:

poetry install

Also we need the TkAgg package for histogram viewing: sudo apt-get install python3-tk

As administator, on windows powershell run: usbipd bind --busid 2-2 usbipd attach --wsl --busid=2-2

This is assuming the logitech camera is on BUSID 2-2. You can check this by running usbipd list on windows powershell

You should now be able to run lsusb in WSL and see the camera attached.

Important links for debugging camera issues:

WSL kernel camera repo with camera test script: https://github.com/PINTO0309/wsl2_linux_kernel_usbcam_enable_conf/tree/5.15.90.1 Install usbpid on windows: https://github.com/dorssel/usbipd-win How to bind a camera to wsl from windows with usbpid: https://github.com/dorssel/usbipd-win/wiki/WSL-support/6befeedd4c8e2a49468e4b03532c9a20478f8677 Original ask ubuntu for how to get cameras working with wsl (it's hard): https://askubuntu.com/questions/1405903/capturing-webcam-video-with-opencv-in-wsl2

TODO

• Attempt OCR on dice
• Depending on that, write function to find center bounding box and print result of center bounding box
• Hook into dice roller to activate camera after dumping but before raising
• Evaluate accuracy over successive runs
• Potentially switch out models depending on accuracy, or train custom model.
  • The OCR might do well at detecting characters, but needs help with identifying the characters.

Troubleshooting

error: (-2:Unspecified error) The function is not implemented.

As far as I can tell, this is an issue with poetry using a different version of cv2 that is uncompiled?

To fix this, you can try the suggestions to install libgtk2.0-dev and pkg-config. If that doesn't work, try uninstalling and reinstalling opencv-python with pip:

pip uninstall opencv-python
pip install opencv-python

Script using wrong camera, or failed to find frame

This could be because you have two cameras plugged into your computer. For me, this was a built-in webcam and a usb camera that wasn't set as the default.

To switch cameras, try running ls /dev/ before and after plugging in your camera. You should be able to see a list of video0, video1, and so on. Your USB camera should be the video that appears in that list after plugging it in. Once you've figured that out, you can use that when calling cv2.VideoCapture instead of whatevers already in the script.