Recently I've read online on how to adjust the colour balance of pictures using curves to obtain a correct white balance. It said to set a white/grey/black point.
Now using my common sense, I select a pure white/blown out area of the picture to set as my white point, there wouldn't be, and there isn't any, change in the white balance of the picture.
So does it mean that I only select what I THINK should be white to set as the white point?
Thanks alot and pardon me for my noob question.