[Digikam-users] Dark Images for 16-bit raw and reconstructed highlights

[Gilles Caulier]

For me sometime, yes, sometime no, this depand of the picture content.
Sound like improvment in libraw need to be done.

Question : with your picture, can you reproduce the dysfunction with
dcraw command line tool ?

Gilles Caulier

2009/5/26 Paul Waldo <paul at waldoware.com>:
> Can anyone else confirm that converting a raw with Unclip and/or Rebuild Highlights produce a dark image with much shadow detail thrown away?  I plan on filing a bug and want to make sure this is not just my issue.  Thanks in advance!
>
> Paul
> ----- "Paul Waldo" <paul at waldoware.com> wrote:
>
>> Hi David,
>>
>> Thanks for having a look.  I find that "Solid White" and "Blend"
>> produce good results.  I get the dark image in "Unclip" and "Rebuild"
>> mode.  Do you get the same results?
>>
>> Paul
>> ----- "davidvincentjones" <davidvj at verizon.net> wrote:
>>
>> > Taking your raw data ... I applied my usual 'blend' plus 'auto
>> > brightness'
>> > and found the image anything but dark.
>> >
>> > My reading of the image indicated slightly blown highlights but a
>> good
>> > black
>> > range. I do not by the way think that my process lost the highlight
>> > detail.
>> >
>> > Without using the 'auto brightness', and simply manually opening up
>> > the data
>> > provides a very similar result.
>> >
>> > Are you perhaps using an icc that is totally incompatible?
>> >
>> > David
>> >
>> >
>> > Bugzilla from paul at waldoware.com wrote:
>> > >
>> > > Hi Mikolaj,
>> > >
>> > > Sorry it took solong to respond, but I had hosting issues...
>> > > The original raw file can be found here:
>> > > http://www.waldoware.com/photo2009-02-26_18-52-30-000034.crw
>> > >
>> > > I did a conversion using the defaults plus setting Highlights to
>> > Rebuild
>> > > which is viewable here:
>> > >
>> >
>> http://www.waldoware.com/photo2009-02-26_18-52-30-000034_highlights_rebuild.png
>> > >
>> > > BTW, only two out of the four Highlights options cause this
>> > truncation of
>> > > pixels.  Any ideas you have would be greatly appreciated!
>> > >
>> > > Paul
>> > >
>> > > ----- "Mikolaj Machowski" <mikmach at wp.pl> wrote:
>> > >
>> > >> On Tuesday 12 May 2009 15:20:25 Paul Waldo wrote:
>> > >> > Has anyone in the Digikam community had good results with
>> > Highlight
>> > >> > Rebuild?  I just can't get it to work without destroying my
>> > image
>> > >> :-(
>> > >> >
>> > >> > Paul
>> > >>
>> > >> I used HR successfully in the past, didn't use recently being
>> more
>> > >> careful
>> > >> when shooting. Could you post somewhere your RAW for testing?
>> > >>
>> > >> m.
>> > >> _______________________________________________
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>> > >
>> > >
>> >
>> > --
>> > View this message in context:
>> >
>> http://www.nabble.com/Dark-Images-for-16-bit-raw-and-reconstructed-highlights-tp23414351p23556239.html
>> > Sent from the digikam-users mailing list archive at Nabble.com.
>> >
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