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Quick Fix for Severe Colorcast

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  • Quick Fix for Severe Colorcast

    This a quick and easy fix for severe colorshifts that effect the entire image evenly. Photoshop 7 [details]
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  • #2
    Danny, thanks for this. It's simple and logical...

    Scott

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    • #3
      Newbie color cast question

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

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      • #4
        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
        Attached Files

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        • #5
          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.

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          • #6
            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

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            • #7
              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

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              • #8
                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.

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                • #9
                  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.

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                  • #10
                    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.
                    Attached Files

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                    • #11
                      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.
                      Attached Files

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                      • #12
                        Re: Severe Colorcast

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

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                        • #13
                          My "Blur->Average" technique was an adendum to this tutorial of Doug's as an alternative way to remove casts.

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