Re: fine art reproduction questions
Re: fine art reproduction questions
- Subject: Re: fine art reproduction questions
- From: Ben Goren <email@hidden>
- Date: Sun, 2 May 2010 12:40:30 -0700
On 2010 May 2, at 12:28 PM, Mike Strickler wrote:
> Maybe I read too cursorily, but why the concern here with HDR?
If I may play devil's advocate, I *think* the idea is that HDR can be used to reduce shadow noise even when said shadows aren't being pushed or otherwise manipulated.
For example, let's say we're reproducing a gray scale chart. With your normal workflow, ideally, you should be able to put your spectrophotometer on the original and the print and get the same Lab values (within your acceptable margin of error). Further, let's assume that one of the sample patches measures L* = 10, a* = 0, b* = 0.
The camera will, of course, have no trouble capturing that dark-dark gray; it's well within its dynamic range. But, that patch will be noisier than the patch that measures L* = 90, a* = 0, b* = 0.
An HDR exposure, properly done, will produce the same output, but there will be less noise in said dark-dark gray patch.
The first question is: is the noise even visible in the non-HDR version? I sure haven't ever been able to see it.
The second question is: does HDR reduce the noise by an amount sufficient to be worth all the extra headaches? I really doubt it.
Cheers,
b& _______________________________________________
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