Color Correction

I'm developing an AR app using Vuforia and Unity.
I want find a method to detect white balance of camera view and then control the light balance of augmentation object.
I found how use camera-image-access and I think is usefull to do the correction.
But I'm new on Unity so the question is: when I have the camera image how can I use it to do color correction?
There's a method to color correct augmentation based on camera device white balance?

Tank You