How to do color manipulation?

[RussellRC]

Hi guys,

Is it possible to do image manipulation like brightening, darkening, contrast... or applying some function to the whole image on pixel by pixel basis?

Thanks,
Russell

[lovell]

Hello, did you see #609?

[Algae666]

I 2nd the request to expose libvips modulate functionality in sharp, definitely would make a useful addition. (or 3rd, or whatever...)

[lovell]

@RussellRC Hopefully #609 will provide what you need, please feel free to re-open with more details if not.