Only application I've used this for so far is a technique for defining and recognizing gestures. They're called "flash gestures" (or that's what the page where

Only application I've used this for so far is a technique for defining and recognizing gestures. They're called "flash gestures" (or that's what the page where I read about them called them) where you find the closest of 8 directions to the gesture direction and encode each gesture as a sequence of digits 1-8 corresponding to these closest directions, then use the Levenshtein distance algorithm to find the closest matching pattern. EDIT: Found the reference I used to implement this. https://books.google.com/books?id=_1rSBQAAQBAJ&pg=PA85&lpg=PA85&dq=gesture+recognition+algorithm+%2B%22levenshtein%22&source=bl&ots=lW4f4MvuV0&sig=ACfU3U2psj9IXvQHlnhakiWYFIF-7ONTLw&hl=en&sa=X&ved=2ahUKEwiP5bDimpfkAhUESN8KHeWkDyo4ChDoATAAegQICBAB https://books.google.com/books?id=_1rSBQAAQBAJ&pg=PA85&lpg=P...