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Flawed auto exposure in digital cameras

Discussion in 'Open Discussion' started by s0nus, Aug 13, 2011.

  1. s0nus

    s0nus Mu-43 Veteran

    Dec 13, 2010
    I came across this article on Luminous Landscape about the flawed nature of digital camera auto exposure algorithms.

    In short, they do not take into account the sensor's ability to record more tones at the bright end. The author suggests that when shooting in RAW, to adjust the exposure so that the histogram kisses the right, and then to normalize (shift back to the dark) in post processing. This results in a higher dynamic range, and less noise in the dark areas.

    He also suggests that camera manufacturers should be doing this by default, automatically, and offers some possible solutions on how RAW formats can handle it.

    Is anyone familiar with this concept, and does anyone use this technique as a result?
  2. Warren T.

    Warren T. Mu-43 Veteran

    Mar 10, 2010
    San Francisco
    There was a long discussion about this here on Mu-43: ETTR Thread
  3. s0nus

    s0nus Mu-43 Veteran

    Dec 13, 2010
    Ahh. I should have searched.

    Mods - feel free to lock/delete this thread.
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