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[D] Text character visual similarity algo?

Hey, for an application I’m making I want to find the similarity between how two letters look.

For example, o and O have a high similarity but o and K do not.

Can someone guide me on what sort of techniques I would use (not necessarily ML, but this sounds like a DL task) in order to find a similarity between the look of two characters? It could be any character in any language that’s why I can’t just do it manually.

My proposed algorithm is as follows: 1. Accept 2 letters as argument 2. Generate same size image with same sized characters placed in them 3. Compute the similarity between the two images somehow 4. Get result

How would I do step 3? Any guidelines are appreciated. I’m currently looking into HOG classifiers, any other information is appreciated.

EDIT: My idea right now is to extract key features using algorithms like SURF, ORB etc (find the best one) and then compare 2 images them using cosine similarity between the two feature vectors. Would this work?

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Toronto AI is a social and collaborative hub to unite AI innovators of Toronto and surrounding areas. We explore AI technologies in digital art and music, healthcare, marketing, fintech, vr, robotics and more. Toronto AI was founded by Dave MacDonald and Patrick O'Mara.