What would be the best way to extract letters from a game board image?

4 weeks ago 22
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I write a tool (C# 9) to solve word games like crosswords and others. I am provided with the game board as an image.
I tried various ways to read the board in order to build an in-memory object representation of it.
I am not satisfied with my results for now.
How would you do that ?

using a 3rd party lib to extract text, such as Tesseract ?

preparing images of individual letters, then compare them with the board image ?

other ?

I aim precision more than performance.

This is an example of a board as image :

Board image sample

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