Quick Fix for Severe Colorcast

[Doug Nelson Janitor Find all posts View Profile Close Doug Nelson]

This a quick and easy fix for severe colorshifts that effect the entire image evenly. Photoshop 7 [details]

[sdubose99 Senior Member Find all posts View Profile Close sdubose99]

Danny, thanks for this. It's simple and logical...

Scott

[christo Senior Member Find all posts View Profile Close christo]

Newbie color cast question

Can you explain "The first thing we do is to sample an area using the eyedropper set to 5x5."

[sdubose99 Senior Member Find all posts View Profile Close sdubose99]

In Photoshop, click on the eyedropper tool. Then in the eyedropper toolbar above your canvas, a dropdown appears saying Point Sample. Change it to 5x5 Average, which essentially makes a broader sample area.

Scott

[Swampy Senior Member Find all posts View Profile Close Swampy]

Another way to do this is to duplicate the original, Run Blur->Average on the dupe. This will essentially give you the average color of the cast. Invert and set that layer blend mode to overlay.

This method gives a better assessment of the color cast by averaging the entire image rather than just a 5x5 pixel area.

[palms Senior Member Find all posts View Profile Close palms]

Please please can we have more of this sort of tutorial, i really struggle with colour cast's etc etc, Tutorials that i find end up confusing me more absolutely love this one, because i can understand it and follow it too

Thank you

Palms

[Syd Senior Member Find all posts View Profile Close Syd]

Here's another approach albeit for a mild color cast. [URL=http://www.lunacore.com/photoshop/tutorials/tut005.htm] An approach I often use is one I picked up at myjanee.com (but for some reason I can't seem to look up her tutorial page tonight). It is also very simple. Use the Threshold command to determine the whitest spot on the image. Alternately you could just decide what you wanted to turn white eg. a white shirt, a cloud, etc. Use a color sampler marker to mark the whitest spot then cancel threshold. Use your eyedropper tool to sample the color at that point, create a new layer, fill the layer with the color, invert it and set to Color Dodge. This will turn everything the sampled color to white.
Sincerely Syd

[Stroker Senior Member Find all posts View Profile Close Stroker]

To the colour layer, clip a H/S adjustment layer and tweak with the Hue and Sat sliders. One of my favorite little things.

Over-all, my personal favorite variation is the Lab one.

[Peter S Senior Member Find all posts View Profile Close Peter S]

You guy probably already know this, but not forget you can also add a mask to hide parts of the pictures that don't have a cast.

[philbach Senior Member Find all posts View Profile Close philbach]

Doug vrs Swampy

Well I Downloaded Restoration Challange #85 which has a severe color cast and used Doug's Method on the left and Swampy's Method on the right. No other corrections were made to the file. Using Doug's technique, I sampled the baby's right sleeve which I presumed was white.

[Swampy Senior Member Find all posts View Profile Close Swampy]

Phil

Your sample appears to be more color fading or staining (after the fact) than a true digital color cast that occurs when the shot it taken.

Below is a before and after that removed the blue color cast using my Blur->Average technique.

There are obviously other color and curves remaining to do on my "After" shot, but the blur technique did a pretty decent job of getting the cast out.

[christo Senior Member Find all posts View Profile Close christo]

Re: Severe Colorcast

is this Blur->Average technique in any of the tutorials?

[Swampy Senior Member Find all posts View Profile Close Swampy]

My "Blur->Average" technique was an adendum to this tutorial of Doug's as an alternative way to remove casts.