White Balance and Colour Correction

Discussion in 'Graphics Programs and Photo Gallery' started by nukie, Aug 17, 2003.

  1. nukie

    nukie TPF Noob!

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    Taken from the other thread which seemed to get really off topic.

    How are the levels different to the White Balance? I always thought they were the same thing if not similar.

    And I know that its possible to alter the levels of any photo to get a "more correct" white. But once its a jpg, you're working on pixels with loss in them. With RAW mode, the idea is that its uncompressed, and you fiddle with the whtie balance/levels/histogram before it gets saved as another file format.

    Well, at least thats my understanding of it. :)
     
  2. voodoocat

    voodoocat ))<>(( Supporting Member

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    I think we are on the same page.

    I was responding to the comment that RAW eliminated the need for white balance. That is true to an extent, but you can still edit a jpg the same way. Yes, there is a loss in quality due to the compression, but the differences are minimal.
     
  3. nukie

    nukie TPF Noob!

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    So to a point, if I shoot in RAW mode, then I can not care about the white balance in the camera (shooting constantly in a middle'ish range). Then correct the colour when its downloaded to my computer?

    Granted I can do this when saving as a JPG, but with the RAW mode I shouldn't lose any clarity, and gain an ideal white balance.

    Just seems as though there has to be a catch.
     
  4. voodoocat

    voodoocat ))<>(( Supporting Member

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    Well there may be more to it than just the histogram. You may need to do a little work to the colors using curves or hue/saturation. Don't take my word for it though. I have little knowledge of digital sensors.

    Now the Sigma SD9 does not have any compression yet it still has white balance.
     
  5. nukie

    nukie TPF Noob!

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    Hmmmmm. Just had a quick play with my g5, and it lets you select RAW Mode and chagne the white balance as well. So it must do something.

    I think its time to head off to google. If I find something which sheds more light on the matter, I'll post it in here.
     
  6. voodoocat

    voodoocat ))<>(( Supporting Member

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    I was reading through the manual for my slide scanner. At the end there is a section with information on getting the the right colors.

     
  7. Dew

    Dew TPF Noob!

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    with that graph u presented voodoo .. it sounds like selective color in photoshop? ... im always taking yellow out of my photos with that one :oops:
     
  8. voodoocat

    voodoocat ))<>(( Supporting Member

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    In this situation I am talking about the curves.

    I will be uploading a tutorial soon..
     
  9. drlynn

    drlynn TPF Noob!

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    Yep, Dew. It can be done with Selective color as well as with the Curves tool. To me, it seems to be a matter of preference, though the Curves tool is more powerful, letting you limit the modification to only the midtones, or highlights, etc.
     

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