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Thread: Help with removing colour cast in this image

  1. #1
    Amirtharaj Williams
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    Default Help with removing colour cast in this image

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    Hi, I shot this image on a cloudy day in Assam, India and despite trying all the tricks in digital basics update can't seem to remove the magenta/violet colour cast. Shot with Canon 1 D Mark II and 100-400 L IS, F9 and 1/160.

    Thanks
    Amirtharaj

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    BPN Member Chris Ober's Avatar
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    I'm sure there are better or more accurate ways but the automatic Levels adjustment does a pretty good job with this one. Ctrl - L. Select Snap Neutral Midtones in the Options.

    I started off with that and did a little contrast and saturation adjustments. The PS masters here will undoubtedly have better results :)
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    Lifetime Member Stu Bowie's Avatar
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    Hi Amirtharaj, just a quick job to show what can be done. I used the colour balance and played with the green magenta slider, obviously moving more towards the green. I also tweaked the cyan and red too. I should have selected only the elephants, but did this on the whole image.

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    I'm a newbie here so take this accordingly. :)
    I also tried the tips in Digital Basics Update with not much luck. I applied a warming curve first (It's an action I have). Then I went to Adjustments/Saturation and lowered the Yellow a bit since the action made the grass too bright. Then I adjusted the Tint a bit by moving the slider to the right.
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    Lifetime Member Doug Brown's Avatar
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    Here's my version. I took a more elaborate approach. I first found middle gray and did a Levels adjustment for it. I did a color balance adjustment layer, pushing the cyan/red slider slightly to the cyan side and the magenta/green slider a little to the green side. I created a Hue/Saturation adjustment layer and pulled down the master saturation by about 60. The last thing I did was a slight curves adjustment. All of these changes were applied just to the elephants.
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    Lifetime Member Marc Mol's Avatar
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    If you have Nik Color Efix Pro3 (CS filter) it's the easiest of the lot, in White Neutralizer select your color pick on the object cast and click (use the slider to suit, usually around 25-30%)
    it then opens back up in CS5 as a new layer in which you can change the BG/FG etc, which I have not worked on, just wanted to show the Ele's.
    Here:
    Last edited by Marc Mol; 12-04-2010 at 08:23 AM.


  7. #7
    Amirtharaj Williams
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    Default Thanks everyone for taking the time.

    Thank you and I am now going to try and remove the colour cast on similar images to learn the various techniques outlined above. before I head off to colour correct, Doug, I have a question though. You said " I first found middle gray and did a Levels adjustment for it." How do you find the middle gray? thanks.

    Cheers
    Amirtharaj

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    Lifetime Member Doug Brown's Avatar
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    Quote Originally Posted by Amirtharaj Williams View Post
    You said " I first found middle gray and did a Levels adjustment for it." How do you find the middle gray? thanks.
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  9. #9
    Amirtharaj Williams
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    Dear Doug, Thank you. Been playing around with colour correction on some of my images. Hope to post a few soon.
    best
    Amirtharaj

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    Here are a few steps I believe I learned here or there...... It really works well the majority of the time.
    I do find that the last step is needed in most cases as well.


    Color Cast Correction :

    Open image
    Duplicate image
    Have both images on screen Windows > Tiles
    On duplicate image : Filter > Blur > Average
    On original image : Curves > Midtone Eye Dropper > Click once on Duplicate Blur Copy > View instant correction on original copy !
    If it is too much of a correction use opacity slider to adjust.
    Last edited by Michael Wolf; 12-25-2010 at 08:49 AM.

  11. #11
    Amirtharaj Williams
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    Thanks. Artie had this particular method outlined in his last Digital Basics file update. It does work most of the time.

    best
    Christy

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