White Balance - Kelvin Temperature not always available

(3 posts)
  • When processing RAW photos in the DEVELOP MODE, the Temperature of the light is shown in Kelvin degress, but is missing when processing JPEGS or TIFFs.  Also missing are all the options like Sunny, Cloudy, Shade, Tungsten, Flourescent, Flash in the selection box directly above. 

    Please add these features for processing JPEGS and TIFFs. 

    Posted On June 3, 2009 - 02:22 AM (5 months ago) (Permalink to this post)
  • tibu
    Focus Group

    I might be wrong, but I ahve alwasys read one advantage to shooting RAW is that you can change the WB in post easily. 

    It seems that each of those options have a color temperature, so they would be a pre-loaded kelvin value. Also having the kelvin scale would be nice. But what I wonder is:

    If the photographer industry always says to shoot RAW and adjust the WB in post, how would this be possible for JPEG? My guess is that the results would not be accurate and not always satisfying if the WB function in ACDSee tied to set a kelvin temp to a file that just doesn't have the information available in the file.

    I don't know, it may work okay, even get you in the ball park. But, that's my guess why it isn't available.

    Posted On June 3, 2009 - 04:06 PM (5 months ago) (Permalink to this post)
  • Tony
    Developer, ACD Systems

    You're right Tibu.  When your camera produces a jpeg image, it basically shoots a raw, and then does the raw processing inside the camera, then converts it to a jpeg.  That means jpeg images have already had the white balance correction applied.  In ACDSee we can't just apply a white balance setting of "sunny" and expect the image to look right because the camera could have already applied "tungsten", or any other setting.

    When you're editing a jpeg you're applying a white balance adjustment to the results of a prior white balance adjustment.  With raws you're changing the one and only white balance adjustment.  It's a very different process, and you'll get far better results with raws.  There's nothing wrong with jpegs, you just have to make sure your white balance setting is right when you take the picture because there's no going back.

    Tony.

    Posted On June 3, 2009 - 04:41 PM (5 months ago) (Permalink to this post)

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