dcraw 8.81 is out...

[Gilles Caulier-4]

Hi all,

dcraw 8.81 is out since few days. This is the changelog :

> Support the Panasonic DMC-L10, added the "-W" option.

From souce code, the new -W option description is :

"-W : Don't automatically brighten the image"

... and from the man page :

"-W  : Use a fixed white level, ignoring the image histogram."

Of course this is to reproduce the same scheme in 8 bits than in 16 bits color depth.

... And this is not yet what we need, the inverse in fact : au white level + gamma in 16 bits (:=)))...

It will be urgent to contact Dave Coffin about this subject. What do you think about ?

Gerhard, Angelo,

Like digiKam 0.9.3 is planed for Christmas, it will be nice to have a new little release of libkdcraw about dcraw decoder update.
Since last stable release, dcraw have been already updated with several improvoment and new recent camera supports.

Of course, we can include this last 8.81 release in libkdcraw, if all work fine of course. regressive tests are require...

What do you think about ?

Gilles

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[Gerhard Kulzer-3]

Am Friday 14 December 2007 schrieb Gilles Caulier:
> Hi all,
>
> dcraw 8.81 is out since few days. This is the changelog :
> > Support the Panasonic DMC-L10, added the "-W" option.

svn is updated in KDE3 and trunk to 8.81 :-)

> >From souce code, the new -W option description is :
>
> "-W : Don't automatically brighten the image"
>
> ... and from the man page :
>
> "-W  : Use a fixed white level, ignoring the image histogram."
>
> Of course this is to reproduce the same scheme in 8 bits than in 16 bits
> color depth.
>
> ... And this is not yet what we need, the inverse in fact : au white level
> + gamma in 16 bits (:=)))...
>
> It will be urgent to contact Dave Coffin about this subject. What do you
> think about ?
>

Totally agree. This issue has been an off-putter for many users, it shows up
frequently in the ML.

> Gerhard, Angelo,

Question: who does it. I could volunteer Gilles, but you have more authority
as the main developer, and you had already contact with him.
???
> Like digiKam 0.9.3 is planed for Christmas, it will be nice to have a new
> little release of libkdcraw about dcraw decoder update.
> Since last stable release, dcraw have been already updated with several
> improvoment and new recent camera supports.
>
> Of course, we can include this last 8.81 release in libkdcraw, if all work
> fine of course. regressive tests are require...
done OK
> What do you think about ?
>
> Gilles



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[Gilles Caulier-4]

2007/12/14, Gerhard Kulzer <[hidden email]>:

Am Friday 14 December 2007 schrieb Gilles Caulier:
> Hi all,
>
> dcraw 8.81 is out since few days. This is the changelog :
> > Support the Panasonic DMC-L10, added the "-W" option.

svn is updated in KDE3 and trunk to 8.81 :-)

> >From souce code, the new -W option description is :
>
> "-W : Don't automatically brighten the image"
>
> ... and from the man page :
>
> "-W  : Use a fixed white level, ignoring the image histogram."
>
> Of course this is to reproduce the same scheme in 8 bits than in 16 bits
> color depth.
>
> ... And this is not yet what we need, the inverse in fact : au white level
> + gamma in 16 bits (:=)))...
>
> It will be urgent to contact Dave Coffin about this subject. What do you
> think about ?
>

Totally agree. This issue has been an off-putter for many users, it shows up
frequently in the ML.

> Gerhard, Angelo,

Question: who does it. I could volunteer Gilles, but you have more authority
as the main developer, and you had already contact with him.

Yes, i have already contacted Dave in the pass, but i'm not about this subject.

It's can be difficult to convince him about this subject (see the dcraw web project page FAQ)...

But the dcraw interface must give the same features in 8 and 16 bits color depth. If 8 bits mode but can corrected white balance and  gamma automatically, why 16 bits cannot do it. To have checked dcraw code, it's possible to dot it... but code still complex and only Dave can patch it properly.
 
This is my proposal : if you can, contact him and CC me in email. If necessary, for any advanced technical subject, i can help you easily... It fine for you ?

Gilles

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> Gerhard, Angelo,

>
> Like digiKam 0.9.3 is planed for Christmas, it will be nice to have a new
> little release of libkdcraw about dcraw decoder update.
> Since last stable release, dcraw have been already updated with several
> improvoment and new recent camera supports.
>
> Of course, we can include this last 8.81 release in libkdcraw, if all work
> fine of course. regressive tests are require...
>
> What do you think about ?

I was planning to release a new libdcraw since Gerhard has improved it several times :)

My lack of time in these days is very bad :/ I will be at home from next 21/12 to 6/1 though
so i should find time to do more things...

Please check if new dcraw has any ABI/API impact though... and tell me ;)

Cheers,
        Angelo


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[Gerhard Kulzer-3]

Am Friday 14 December 2007 schrieb Angelo Naselli:

> > Gerhard, Angelo,
> >
> > Like digiKam 0.9.3 is planed for Christmas, it will be nice to have a new
> > little release of libkdcraw about dcraw decoder update.
> > Since last stable release, dcraw have been already updated with several
> > improvoment and new recent camera supports.
> >
> > Of course, we can include this last 8.81 release in libkdcraw, if all
> > work fine of course. regressive tests are require...
> >
> > What do you think about ?
>
> I was planning to release a new libdcraw since Gerhard has improved it
> several times :) My lack of time in these days is very bad :/ I will be at
> home from next 21/12 to 6/1 though so i should find time to do more
> things...
>
> Please check if new dcraw has any ABI/API impact though... and tell me ;)
>
> Cheers,
> Angelo

The API provides 2 more options (which we don't use yet in digiKam) compared
to 8.78, but the other parameters are the same. The compatibility is still
there by using a subset of all possibilities.

Gerhard

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