Re: fine art reproduction questions
Re: fine art reproduction questions
- Subject: Re: fine art reproduction questions
- From: Matthew Ward <email@hidden>
- Date: Sun, 2 May 2010 18:04:26 +0100
We seem to be on entirely parallel tracks. Why are you stating that I
do not understand about linear capture? Why do you think I do not want
to look for something at source?You made a statement that you do not
get linear capture from a DSLR. This is correct if you use some
processing software and not others. I was contributing that if you do
want a linear capture you can get one by using DCRAW. I use it a lot.
You need linear output if you need to make HDR files properly for
example.
If you do a linear capture it is apparent if you are clipping any
information, if you are, an HDR approach will help. One must then do a
gamma/tone correction amongst other things to make it look even
vaguely like the scene.
Why is this the grumpiest email forum I have ever come across? We are
mutually sharing information about digital imaging, not arguing
politics.
Best
Matthew Ward
On 2 May 2010, at 15:08, neil snape wrote:
on 2/05/10 15:55, Matthew Ward wrote :
No idea, why don't you look on the Dcraw site.
I wrote
It is
not
Is it? :0)
Yeah and I wrote the above. Yet maybe someone else knows the answer
that you
don't want to look for at the source.
Many of us are familiar with HDR.
I don't need to look closer at my images.
Good thing.
If you make a genuinely linear capture of a scene and the luminance
is
contained within the histogram on all channels, I cannot see an
advantage in creating an HDR file. (Except as I stated, you might
reduce shadow noise, but I would have thought there were better ways)
Well noise alone is one reason. Since you know HDR and you know you
can
reduce shadow noise, then you can use for that if you need too.
IF you make a so called linear capture of a scene then you will not
have
your so called scene look like the so called scene you are trying to
reproduce.
What you are not understanding is the development from raw is to
make a
image look like your eye sees the images, not trying to reproduce
the scene
values. Just as with film you are compressing the even what a Canon
will
see. Or are you trying to repro using a linear curve?
I suppose I have to state this again and again, it's when you need to
optimise a region of copy work with the el cheapo Canon DSLR then
you may
find advantages in using multiple exposures in either multi layered
files,
or HDR. Not so hard to figure out, unless you don't want to.
Neil Snape
24, rue Modigliani 75015 Paris France
téléphone +33-1-45578055 Portable +33 603474835
email@hidden http://www.neilsnape.com
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