There is an option to filter only one color (R,G,B,Y) in my camera. What I want to know is can this effect be achieved in photoshop? And what is this called? I tried googling monochrome and came up ...
How to make the single color in a photography to be color and other parts changed to B&W?. Don't know exactly the name of the effect, to be more clear in the following photo I want the green part ...