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Avoiding colourcast - best practice?

  • 19-06-2007 3:48am
    #1
    Fenster
    Closed Accounts Posts: 4,763 ✭✭✭


    I've had problems with bad colourcasting around the house, that's been hard to fix, where photos veer to red/blue in different areas. Setting a custom WB is only good for a given room as the lighting is subtly different in each.

    'elp? :[


Comments

  • #2
    DonkeyStyle \o/
    Closed Accounts Posts: 7,145 ✭✭✭DonkeyStyle \o/


    Have you tried shooting in RAW mode?
    As I understand it; it allows you to bypass some in-camera processing functions... so when you're setting your white ballance on the PC after the fact, you're setting it for the first time, instead of trying to muck around with an already processed image.
    I think you have more bits per pixel in RAW, I can't remember... but I like the results.


  • #3
    Fenster
    Closed Accounts Posts: 4,763 ✭✭✭Fenster


    Shooting raw doesn't help much - it's something of a misdeneamour to say that white balance doesn't matter with raw, as even there it makes a huge difference.


  • #4
    Zillah
    Registered Users, Registered Users 2 Posts: 17,371 ✭✭✭✭Zillah


    My understanding is that RAW allows you to set white balance after shooting, which means you can tailor it to every shot.


  • #5
    5uspect
    Moderators, Arts Moderators Posts: 10,520 Mod ✭✭✭✭5uspect


    I think Zillah is correct.
    luminous-landscape wrote:
    Raw files have not had while balance set. They are tagged with whatever the camera's setting was, (either that which was manually set or via auto-white-balance), but the actual data has not been changed. This allows one to set any colour temperature and white balance one wishes after the fact with no image degradation. It should be understood that once the file has been converted from the linear space and has had a gamma curve applied (such as in a JPG) white balance can no longer be properly done.

    linky

    One nice method for correcting colour casts for normal files in photoshop that I came across is to duplicate your layer, apply an average blur to the duplicate , invert the layer and then change the blend mode to colour. Then drop the opacity to taste to obtain the correct colour.


  • #6
    Muineach
    Closed Accounts Posts: 575 ✭✭✭Muineach


    What I tend to do for inside shots it open them in RAW (5-6), adjust one to get the colour "right" then copy those settings to the other photo's, then just fine tune it.

    You can do it a bit easier with Adobe Bridge (right click on RAW image Develop settings, copy , select all the photos in the range, then right click develop settings-paste settings).


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