Hey this works really great and seems to perform better even for white/grey
highlight reconstruction.
We have a bit of a debate running on the Pentax User forum as to whether HDR
was necessary or even a benefit for a particular scene, with a couple of us
attempting to match 5 shot HDR results from a single image. An underexposed
raw still had 200,000 blown pixels in the cloud boundary areas (as reported by
the very useful rawshack) and I wasn't able to recover detail for much of this
area in darktable although to my surprise a guy with lightroom could. Anyways
in the end I pulled your new stuff from git and with this seem to have
completely recovered the highlight detail now - at least as good as the posted
LR results and maybe a hair ahead.
Thanks,
Rob.
From: johannes hanika [mailto:hana...@gmail.com]
Sent: 07 April 2014 20:51
To: darktable-devel
Subject: [darktable-devel] first lgm results: new highlight reconstruction
heya,
as a first outcome of the meeting in leipzig i implemented an idea by a1ex from
magic lantern, which reconstructs color in your blown highlights (3rd combo box
entry in our highlights module, git master).
seems to work great on blown skin tones.
there is no opencl version for it yet (only dumb slow cpu code), and sometimes
i get slight mazing artifacts when using my simplified version that is
implemented in dt. i find it useful to set the edge threshold to > 0.0 in the
demosaic module when working with it (this will trigger an edge-aware median
filter on the green channels).
if any of you guys have test images and want to try it on them, that would be
great. there might be quite a few edge cases that i have missed so far.
cheers,
jo
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