Re: Dark Images for 16-bit raw and reconstructed highlights

[Paul Waldo]

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" <[hidden email]> 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" <[hidden email]> 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 [hidden email] 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" <[hidden email]> 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.
> > >> _______________________________________________
> > >> Digikam-users mailing list
> > >> [hidden email]
> > >> https://mail.kde.org/mailman/listinfo/digikam-users
> > > _______________________________________________
> > > Digikam-users mailing list
> > > [hidden email]
> > > https://mail.kde.org/mailman/listinfo/digikam-users
> > >
> > >
> >
> > --
> > 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.
> >
> > _______________________________________________
> > Digikam-users mailing list
> > [hidden email]
> > https://mail.kde.org/mailman/listinfo/digikam-users
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users

_______________________________________________
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[Gilles Caulier-4]

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 <[hidden email]>:

> 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" <[hidden email]> 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" <[hidden email]> 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 [hidden email] 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" <[hidden email]> 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.
>> > >> _______________________________________________
>> > >> Digikam-users mailing list
>> > >> [hidden email]
>> > >> https://mail.kde.org/mailman/listinfo/digikam-users
>> > > _______________________________________________
>> > > Digikam-users mailing list
>> > > [hidden email]
>> > > https://mail.kde.org/mailman/listinfo/digikam-users
>> > >
>> > >
>> >
>> > --
>> > 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.
>> >
>> > _______________________________________________
>> > Digikam-users mailing list
>> > [hidden email]
>> > https://mail.kde.org/mailman/listinfo/digikam-users
>> _______________________________________________
>> Digikam-users mailing list
>> [hidden email]
>> https://mail.kde.org/mailman/listinfo/digikam-users
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>

_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Paul Waldo]

Hi Gilles,

Yes, I can reproduce using dcraw, but the effects are not as bad.  I start with a raw from my Digital Rebel.  It has a full histogram; showfoto shows values from 0 to 64k if I do no highlight restoration.  I then used "dcraw -c -H n photo.crw | pnmtopng > photo_Hn.png" for n in 0..3.

The H0 and H2 PNG show full-featured histograms from 0-255.  The H1 and H3 histograms, OTOH, show degradation.  The images are somewhat dark and the fullness of the histogram runs in the approximate range 0-230.  There are a couple little spikes after that, but essentially nothing.

I guess this means this is a dcraw problem?

Paul
----- "Gilles Caulier" <[hidden email]> wrote:

> 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 <[hidden email]>:
> > 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" <[hidden email]> 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" <[hidden email]> 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 [hidden email] 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" <[hidden email]> 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.
> >> > >> _______________________________________________
> >> > >> Digikam-users mailing list
> >> > >> [hidden email]
> >> > >> https://mail.kde.org/mailman/listinfo/digikam-users
> >> > > _______________________________________________
> >> > > Digikam-users mailing list
> >> > > [hidden email]
> >> > > https://mail.kde.org/mailman/listinfo/digikam-users
> >> > >
> >> > >
> >> >
> >> > --
> >> > 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.
> >> >
> >> > _______________________________________________
> >> > Digikam-users mailing list
> >> > [hidden email]
> >> > https://mail.kde.org/mailman/listinfo/digikam-users
> >> _______________________________________________
> >> Digikam-users mailing list
> >> [hidden email]
> >> https://mail.kde.org/mailman/listinfo/digikam-users
> > _______________________________________________
> > Digikam-users mailing list
> > [hidden email]
> > https://mail.kde.org/mailman/listinfo/digikam-users
> >
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users

_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-4]

2009/5/26 Paul Waldo <[hidden email]>:
> Hi Gilles,
>
> Yes, I can reproduce using dcraw, but the effects are not as bad.  I start with a raw from my Digital Rebel.  It has a full histogram; showfoto shows values from 0 to 64k if I do no highlight restoration.  I then used "dcraw -c -H n photo.crw | pnmtopng > photo_Hn.png" for n in 0..3.
>
> The H0 and H2 PNG show full-featured histograms from 0-255.  The H1 and H3 histograms, OTOH, show degradation.  The images are somewhat dark and the fullness of the histogram runs in the approximate range 0-230.  There are a couple little spikes after that, but essentially nothing.
>
> I guess this means this is a dcraw problem?

Yes, indeep i think.

I recommend to ask to dave cofin directly. All future fixes will be
reported later in libraw by Alex...

Gilles

>
> Paul
> ----- "Gilles Caulier" <[hidden email]> wrote:
>
>> 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 <[hidden email]>:
>> > 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" <[hidden email]> 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" <[hidden email]> 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 [hidden email] 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" <[hidden email]> 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.
>> >> > >> _______________________________________________
>> >> > >> Digikam-users mailing list
>> >> > >> [hidden email]
>> >> > >> https://mail.kde.org/mailman/listinfo/digikam-users
>> >> > > _______________________________________________
>> >> > > Digikam-users mailing list
>> >> > > [hidden email]
>> >> > > https://mail.kde.org/mailman/listinfo/digikam-users
>> >> > >
>> >> > >
>> >> >
>> >> > --
>> >> > 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.
>> >> >
>> >> > _______________________________________________
>> >> > Digikam-users mailing list
>> >> > [hidden email]
>> >> > https://mail.kde.org/mailman/listinfo/digikam-users
>> >> _______________________________________________
>> >> Digikam-users mailing list
>> >> [hidden email]
>> >> https://mail.kde.org/mailman/listinfo/digikam-users
>> > _______________________________________________
>> > Digikam-users mailing list
>> > [hidden email]
>> > https://mail.kde.org/mailman/listinfo/digikam-users
>> >
>> _______________________________________________
>> Digikam-users mailing list
>> [hidden email]
>> https://mail.kde.org/mailman/listinfo/digikam-users
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>

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[hidden email]
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