Re: Media Testing for maclife.de
Re: Media Testing for maclife.de
- Subject: Re: Media Testing for maclife.de
- From: Eric Chan <email@hidden>
- Date: Sun, 14 Sep 2008 07:19:58 -0700 (PDT)
> OTOH, if DNG profiles do have an advantage over ICC camera
> profiles
> (in that they include calibration data), and even with this
> advantage,
> cannot improve on the results ICC camera profiles are able
> to deliver,
> this will only make them look worse.
DNG profiles themselves do not contain the calibration data, but the DNG raw file itself does (i.e., outside the profile) via the CameraCalibration1 and CameraCalibration2 tags. The separation is by design. If the calibration data was folded into the profile itself, then that profile would only be useful to the specific camera unit for which that calibration data was obtained. Having the calibration data be separate is useful because different units of the same model may have different calibration data but share the same profile.
Going back to the printer analogy, you may linearize a printer first then build a profile, but the linearization itself shouldn't be folded into the profile.
Eric
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