Don't quote me on this, but since the pixel values are all floats I'm
pretty sure it's possible for one module to push them beyond the
"maximum" values and another one to bring them back in with the detail
still there, as long as everything ends up within the allowable bounds
by the time it gets converted to int
On 04/08/2018 07:11 PM, Guillermo Rozas wrote:
Can you provide the original DNG so people can play with it?
One think you should take into account is that modules in Darktable
are applied in a certain order (bottom to top on darkroom). In
particular, "Exposure" and "Base Curve" come before "Shadows and
highlights". So, if Exposure pushes the info of the sky past the white
point, you can not get it back later (at least that's how I understand
it). Going by the histogram, it looks like this is what happening to
your picture (there are a lot of pixels close to the right edge): the
info was there before the exposure (and base curve) modules, but not
by time you get to the shadows and highlights module.
Two tips I can give you:
- check the RAW over-exposure indicator (small colors icon below and
to the right of the picture in darkroom). If the area is really
non-recoverable it will show as over exposed in RAW. If not, there is
a way to recover it (not always easy, but the info is there)
- my first step when editing complex pictures is to use the exposure
and black sliders on the Exposure module to fit the data exactly
inside the histogram (using the normal under/over exposure indicator).
Then I know I'm working with almost all the info the file have.
Best regards,
Guillermo
On Sun, Apr 8, 2018 at 7:04 PM, Peter Cripps <pe...@petercripps.com
<mailto:pe...@petercripps.com>> wrote:
I've seen similar results to Chris. One of the (few) things that
I've found Lightroom does better than darktable is highlight
recovery.
I have noticed that the darktable histogram doesn't seem to show
content at the far right hand side that does show in the Lightroom
histogram. Don't know if this is relevant.
I hesitate to mention this, since I'm very conscious of the fact
that darktable is entirely created by people working on their own
time. It seems ungrateful to pick out one thing that isn't perhaps
as good as with other paid programs.
Peter
On 04/08/2018 02:51 PM, Chris wrote:
Hi,
So the shadows & highlights module also does not seem to full
'reveal' the detail in the clouds that I know exists... it simply
darkens the existing pixels that we can already see. So not
really 'recovering detail' as such.
https://www.dropbox.com/s/u3lo4oy9dokdbwh/darkt_04.jpg?dl=0
<https://www.dropbox.com/s/u3lo4oy9dokdbwh/darkt_04.jpg?dl=0>
and pushed further
https://www.dropbox.com/s/zih4f434frcxizu/darkt_05.jpg?dl=0
<https://www.dropbox.com/s/zih4f434frcxizu/darkt_05.jpg?dl=0>
obviously I am going to extremes here... but they still just do
not compare to the clarity revealed from LR.
https://www.dropbox.com/s/suw9v3jnsszbsec/lr_02.jpg?dl=0
<https://www.dropbox.com/s/suw9v3jnsszbsec/lr_02.jpg?dl=0>
Thanks,
Chris
On 2018/04/08 02:30 PM, Pascal Obry wrote:
Le dimanche 08 avril 2018 à 14:25 -0700, Chris a écrit :
Anyway, these are my adventures into highlights in DarkTable.
You haven't activate the "shadows & highlight" module, so indeed
nothing done for darktable :)
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