Is there a code that reads the numeric image on the screen and switches to numeric characters?

My goal is to figure out the in-game damage formula, which requires me to look at and calculate a lot of damage. It's hard for me to do it myself, so I'm going to recognize the damage number (1930-1829 this feeling) displayed on the game screen, convert it into a number, and then analyze it through code.

Maybe it's because I don't have information power, but I don't think it comes out well even if I search on Google, so I'm asking you here. I know that location onscreen is a code that recognizes whether a specific image is present on the screen and tells you whether or not that image is present, and in the same way, I think you can recognize a specific number on the screen and store that number in the variable in the code.

For your information, I only learned coding for the first semester of my first year of college, so I don't know anything at all. It would be better if you could let me know the code directly, and I would really appreciate it if you could let me know the related site.