[hkuo]

Thanks joshu and swah! I'm actually the creator of the site and am doing this completely manually. I've explored here and there on how I might automate it, though it all looks a bit daunting. I hadn't heard of OpenCV, and I will definitely explore this further. Thank you so much!

[joshu]

OpenCV is just an API, might be a lot of work.

I think you want to do a Hough transform and then look for long vertical lines.

But I'm no expert.