RE: Camera Raw Plug-in
RE: Camera Raw Plug-in
- Subject: RE: Camera Raw Plug-in
- From: Ian Lyons <email@hidden>
- Date: Sun, 23 Feb 2003 14:13:00 +0000
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Andrew,
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>>> >> Sadly Camera
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>>> >> Raw treats the highlight end EXACTLY like the software provided by
Canon
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>>> >> it blasts to hell much of the GOOD data so that we don9t see out of
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>>> whack it
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>>> >> can become.
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>> > Are you saying from some default settings OR after you've tweaked the
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>> > various options in Camera Raw?
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The default settings. Trying to tweak the image in ACR is a complete waste
of
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time. Once clipped ALWAYS clipped - ACR9s handling of subtle highlight
detail
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with the D30/60 is poor!
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>>> >> So from my perspective Adobe have dropped the ball by not
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>>> >> allowing the user to convert the data into the linear state.
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>> > Ease dropping on a conversation the other night with Thomas Knoll, I
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>> thought
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>> > I saw a setting of several sliders that produced a linear transform
(its
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>> not
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>> > the default).
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Maybe there are settings but I haven9t found them and they aren9t
documented.
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Setting exposure, etc to lower values in the hope that the image will be
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rendered as linear isn9t the way to go - the image looks like crap and is
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completely beyond profiling.
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>>> >> Likewise they
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>>> >> haven9t allowed any headroom at the highlight end.
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>> > Again I have to ask at what point you find this? I've taken some
amazing
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>> > tonal data out of 1Ds files with multiple manipulations of the various
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>> > Camera Raw controls.
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There is NO way you should try to make a correlation between what you see
from
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the 1Ds or 1D and what comes off the D30/60. Canon have built-in
compensation
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curves to control highlight rendering on the high-end models. On the D30/60
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these curves don9t exist. The D30/60 images seem to be converted from raw
to
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fully processed using a much simpler algorithm than is used for the 1Ds or
1D
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- it9s almost like apply a gamma curve and then Auto Contrast. I9ll send you
a
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raw D30 image privately so that you can see the problem for yourself. Also
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look at the tutorial I referred to in my earlier post.
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Ian Lyons
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http://www.computer-darkroom.com
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