How to do an image search in ahk?

Question

autohotkey

Hello.
I decided to make a mini program / script that will search for an image on the screen. I studied the documentation and found the imageSearch command / library, but the problem is that I'm looking for an image that constantly changes color. More precisely, captcha. The script should look for a character and press a key, but how can I make ahk ignore the color?
Image example - https://imgur.com/a/HD4FnNH
Thanks in advance for your advice.

Answer 1

Color the letters in black completely.