I'm sure there must be a way to whitebalance images in either Photoshop or AfterFX, with a single magic click... I've tried looking for an effect or filter, but no luck so far.
Specifically, I took still images of a series of objects against a white background. The white background came out yellowish.
How can I use the eyedropper (or other tool) to tell the software that that colour is really white, and have it automagically shift the colour-wheel for all the other colours?
Specifically, I took still images of a series of objects against a white background. The white background came out yellowish.

How can I use the eyedropper (or other tool) to tell the software that that colour is really white, and have it automagically shift the colour-wheel for all the other colours?