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[OM] Re: What are you using for HDR images?

Subject: [OM] Re: What are you using for HDR images?
From: <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 07 Sep 2008 02:31:08 +0000
I'll have to review the HDR doc but I think it recommends a minimum of 3 images 
but I do think that's probably all that would be required.  Right now I'm on my 
krappy laptop and not in a position to judge the kolor of anything for the next 
6 weeks or so.

You were absolutely right about the mosquitoes.  There's no way anyone could 
actually sit in those chairs at the time the photos were taken.  I donated 5 
pints of blood during my short shooting session.

Chuck Norcutt


>  -------Original Message-------
>  From: Moose <olymoose@xxxxxxxxx>
>  Subject: [OM] Re: What are you using for HDR images?
>  Sent: Sep 06 '08 22:56
>  
>  chucknorcutt@xxxxxxxxxxxxxxxx wrote:
>  > I thought you would reply that HDR might not have been required and I have 
> to admit that I didn't try manipulating one of the middle exposures.  I'll 
> have to try that when I get back.
>  >  
>  I thought about that. I do think a very good image could come from one
>  low ISO image that just avoids clipping the sky. However, even in an 8
>  bit JPEG, the depth of noise free shadow detail in the HDR version makes
>  tonal adjustment a joy. I do think 8 exposures is overkill in the
>  interest of experimentation. I suspect two about three stops apart would
>  do the job.
>  
>  I have on a few occasions taken bracketed shots thinking to combine them
>  and found that only one was needed.
>  > I do like the rework on the HDR images.  They are prettier.  But I'm not 
> sure they look like the original scene which was fairly dark.  
>  That's one of the problems with extending the dynamic range. Useful as
>  it sounds, it either has to be limited to subtle effects or it makes the
>  tonality look unnatural. I think it is partly due to the very different
>  way that photography and human vision work. Only the central portion of
>  our visual field is sharp and sees color. Only the outer portion sees
>  into shadows. So when we are looking at a scene like this, our eyes move
>  around and create a virtual composite. Then when we view a photographic
>  image of the same subject, we carefully put all, or at least most, of it
>  in the central field.
>  
>  It just isn't the same thing, so we are trying to find a compromise that
>  looks good, and conveys the sense of the subject, but is never going to
>  be the same. On the other hand, no mosquitoes! :-)
>  > I've come down in definite favor of the rework on #2 but I'm still mulling 
> #1 although it's slowly sinking in.
>  I moved these images.
>  
> <http://www.moosemystic.net/Gallery/Others/CNorcutt/Barnstable/hdr_7052-57_std.htm>
>  
>  Much the way I felt. It was easy to work on #2. It didn't look right to
>  me and took little coaxing to come into balance.
>  
>  With #1, the image as presented is quite appealing. It has very much the
>  feel of sitting on the water at the end of a perfect day, watching the
>  sun set. Warm, soft and comfy.
>  
> <http://www.moosemystic.net/Gallery/Others/CNorcutt/Barnstable/hdr-58-65_std.htm>
>  
>  Still, as it was an HDR image, I thought it would be interesting so see
>  what making more dynamic range visible might contribute. Bringing out
>  the highlight detail and balancing the central brightness/contrast to
>  the rest of the image was easy. Bringing up deep shadow detail so it was
>  there, but not too much so, was tricky. I ended up using mask painting
>  with low flow to work in those areas.
>  
>  The result is, I think, quite a pleasing image, but with a very
>  different feeling tone. I'm not sure I can say one or the other is
>  "better". Using a mask to blend some of the center soft feel with some
>  of the outer shadow detail might be better than either - or not. :-)
>  
>  Moose
>  
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