|Quoting WhyWhyZed (Reply 4):|
-52 -12 +26
Does quite an improvement, if you're interested in fixing it.
- Jason DePodesta
It is neither necessary or even a good idea to use all three colour controls as two are always acting against each other and only two are need to correct any cast. It takes some knack to get used to but the first problem is assessing any cast. Using all three does not help in learning how to correct casts !
By pressing Ctrl+B in Photoshop the colour control sliders come up with options to adjust the levels in the highlights, shadows or mid tones.
Using the Mexicana as an example, this is difficult, not a straightforward image to correct as it is basically a white balance problem.
However, the first thing that hit me was the red/pinkish cast at the top of the fuselage, very unnatural. I ticked highlights and -14, 0, +6 corrected that.
The image was then left with an orangey cast which I corrected in the midtones with -9,0,17
The shadows had taken on a slightly cyan cast which was corrected with +5, 0, 0
You may need to repeat these actions as the controls do have a slight effect on each other and the result here still has a slight cast on the top of the fuselage, though much better.