How do i calculate FOV?

Web: https://www.reddit.com/r/computervision/comments/ukm7i3/how_do_i_calculate_fov/

So I have a pan-tilt system with an airbrush on top, the pressure is quite strong so that I can place the robot at a distance of at least 1.5 meters. I currently have normalized coordinates XY that I can visualize on my camera like this

https://preview.redd.it/vy175ju3a4y81.png?width=627&format=png&auto=webp&s=9d14b17c678f6cd535cae1bf931a840282a4fa36

Now I want to translate those coordinates to a real canvas and allow the pan-tilt to point towards them and eventually spray. The two servos have 0 to 180 degrees but the airbrush …

computervision