Make an image black and white
Match it to the grey colour profile that ships with the system. sips does it in one line, and keeps the original if you give it --out.
How
Save a black-and-white copy:
sips -m "/System/Library/ColorSync/Profiles/Generic Gray Profile.icc" photo.jpg --out photo-bw.jpgThe colour is gone from the copy for good — keep the original.
Or just ask Titan
Make black-and-white copies of these photos.Do it with Titan
Titan is an AI that lives on your computer: tell it what you need and it does it while you watch — you press Return, nothing runs by itself. What is Titan?
Titan isn’t on this computer yet. Get Titan, then press the button again — the task will be waiting, typed in.