Auto-Hide Similar or Duplicate Images

We should not put duplicate images in a slideshow, nor should we allow too many visually similar images.

Here's an interesting article about duplicate and similar image removal:

https://medium.com/@somilshah112/how-to-find-duplicate-or-similar-images-quickly-with-python-2d636af9452f

and associated Github

https://github.com/cw-somil/Duplicate-Remover

---

Here's a different article showing other techniques:

https://mathspp.com/blog/finding-similar-photos