On 6/8/2013 6:37 PM, C.H.Ling wrote:
> ----- Original Message -----
> From: "Moose" <olymoose@xxxxxxxxx>
>
>>> (or DPP for Canon files) by checking the RGB values. There is difference,
>>> depends on which one you like.
>> I have done that comparison a few times. I preferred the ACR color and it
>> has better highlight recovery than DPP.
> Both Viewer 3 and DPP don't do well in highlight recover (there must be some
> reasons, I don't think they don't know how to do it),
I believe that Adobe is willing to infer color values for a blown channel based
on nearby pixels with similar values for
the other two channels and a valid value for the third channel. It's a tricky
thing to do, but whoever wrote the
algorithms was/is very good.
The camera makers seem loathe to infer any color values. DPP does a little
recovery, which I assume is only pulling down
the highest values that aren't at max. Viewer seems to take the position "You
blew it, live with it."
There's an excellent comparison of DPP and ACR in the 5D review on dpreview at
the bottom of this page.
<http://www.dpreview.com/reviews/canoneos5d/23>
> I do use ACR for the
> images with blown highlight on the subject but I seldom use to recover non
> relevant backgrounds, it could make the image unnatual and lost
> concentration.
I sometimes do try recovering background, because a bright background tends to
pull the eye away from some subjects.
It's a delicate thing to do without looking wrong.
> BTW, I try to under expose my images by 1/3 to 2/3 stop so I don't need
> highlight recover much.
Yes, my standard settings is EV -2/3, but I still manage to blow some
highlights. ;-) When I can - and think to do so -
I bracket further down where there are bright elements in a high DR subject.
But some subjects and light are evanescent,
and I don't get a second chance.
Over Blown Moose
--
What if the Hokey Pokey *IS* what it's all about?
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