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Thread: log C encoding

  1. #1

    log C encoding

    Hello,
    i am reading about gamma correction, i've found that some cameras (ARRI) use log C encoding.
    can someone explain the follwing image?
    log C encoding
    taken from
    http://www.arri.de/camera/digital_ca...709_video.html
    why does the 18% level seems draker and darker? if it's 18% luminance it should be higher (bacause the maximum always gets higher).
    what is the exposure (in stops)? do the mean that they measure luminance in exposure? i know that exposure is logarithmic, right?
    why do they map the 18% to code 400? i understand that 18% should represent 0.5 in linear scale.
    thank you.

  2. #2
    GrahamS's Avatar
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    Graham Serretta

    Re: log C encoding

    I think that you are in the wrong forum, but this may help you:
    http://www.arri.de/camera/digital_ca...709_video.html

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