I am wondering how night vision "mode" could be automatically switch on & off in commercial CCTV?
Something like this: https://www.youtube.com/watch?v=ilaXGtsx-DU
(video demonstrate CCTV product with night vision mode)
From what I knew so far, the idea of doing "night vision camera" is by removing "IR Filter" out of the camera, put some IR LED, and there you go - I've succesfully made this fun project too with my OV2640 camera module, and my hacked web cam.
However, by doing this "IR Filter" removal, it won't normally stream correct color when lights are back on (night vision are OFF)
How, then, commercial CCTV could achieve this? They seem using just 1 camera too.. or is there any way to remove "IR Filter" without the need to be physically remove it?
Haven't found any clues (or DIY tutorial) anywhere too. Any help would be appreciated!