Adobe LCP files in Digikam

[Torsten Bronger]

Hallöchen!

Digikam uses the Lensfun library for lens correction.

The Lensfun repository now contains a branch "acm" which implements
the Adobe Camera Model for distortion (including fisheye), TCA, and
vignetting.  Moreover, it contains a script that converts LCP files
into Lensfun XML.  It merges the two data sources, so you get one
big database.  It can even combine LCP and Lensfun correction for
the same lens model.  You may compare
http://wilson.bronger.org/lensfun_coverage.html with
<http://wilson.bronger.org/lensfun_coverage_lcp.html>.  See
http://wilson.bronger.org/lensfun/lensfun-convert-lcp.html for more
information.

You can clone the git branch with

    git clone -b acm git://git.code.sf.net/p/lensfun/code lensfun-acm

or download a tar ball with

    wget http://wilson.bronger.org/lensfun-acm.tar.gz

This Lensfun will print on stdout whether an "acm" model was used
for correction, so that you know whether LCP or Lensfun data is in
action.  Please give us feedback about the functionality and
accuracy so we can evaluate this possible addition.  If you have
access to a Lightroom or Photoshop version, please try to compare
the results.  You may use Lensfun's bugtracker for feedback.  Thank
you!

Tschö,
Torsten.

--
Torsten Bronger    Jabber ID: [hidden email]

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[Gilles Caulier-4]

This is an excellent news about LensFun evolution, to be able to
backport Adobe files as well. This will increase the lens model/maker
list a lots.

This want mean that legally, we will able to distribute and use
converted files through LensFun project without any problems with
Adobe ?

Best

Gilles Caulier

2015-05-13 23:55 GMT+02:00 Torsten Bronger <[hidden email]>:

> Hallöchen!
>
> Digikam uses the Lensfun library for lens correction.
>
> The Lensfun repository now contains a branch "acm" which implements
> the Adobe Camera Model for distortion (including fisheye), TCA, and
> vignetting.  Moreover, it contains a script that converts LCP files
> into Lensfun XML.  It merges the two data sources, so you get one
> big database.  It can even combine LCP and Lensfun correction for
> the same lens model.  You may compare
> http://wilson.bronger.org/lensfun_coverage.html with
> <http://wilson.bronger.org/lensfun_coverage_lcp.html>.  See
> http://wilson.bronger.org/lensfun/lensfun-convert-lcp.html for more
> information.
>
> You can clone the git branch with
>
>     git clone -b acm git://git.code.sf.net/p/lensfun/code lensfun-acm
>
> or download a tar ball with
>
>     wget http://wilson.bronger.org/lensfun-acm.tar.gz
>
> This Lensfun will print on stdout whether an "acm" model was used
> for correction, so that you know whether LCP or Lensfun data is in
> action.  Please give us feedback about the functionality and
> accuracy so we can evaluate this possible addition.  If you have
> access to a Lightroom or Photoshop version, please try to compare
> the results.  You may use Lensfun's bugtracker for feedback.  Thank
> you!
>
> Tschö,
> Torsten.
>
> --
> Torsten Bronger    Jabber ID: [hidden email]
>
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users

_______________________________________________
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[Torsten Bronger]

Hallöchen!

Gilles Caulier writes:

> [...]
>
> This want mean that legally, we will able to distribute and use
> converted files through LensFun project without any problems with
> Adobe ?

IANAL, but I recommend not to distribute files derived from Adobe's
LCP files (there are also really free LCP files but most interesting
is Adobe's DB).  Instead, tell the users how to download them
themselves.  See e.g.
http://rawpedia.rawtherapee.com/How_to_get_LCP_and_DCP_profiles

Tschö,
Torsten.

--
Torsten Bronger    Jabber ID: [hidden email]

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[Gilles Caulier-4]

digiKam do not distribute these files. In fact i ask about a possible
way to do it through LensFun.

But perhaps we must plan a tool in GUi to indicate where Adobe files
are stored in local disk to perform conversion at run-time...

Gilles



2015-05-14 9:52 GMT+02:00 Torsten Bronger <[hidden email]>:

> Hallöchen!
>
> Gilles Caulier writes:
>
>> [...]
>>
>> This want mean that legally, we will able to distribute and use
>> converted files through LensFun project without any problems with
>> Adobe ?
>
> IANAL, but I recommend not to distribute files derived from Adobe's
> LCP files (there are also really free LCP files but most interesting
> is Adobe's DB).  Instead, tell the users how to download them
> themselves.  See e.g.
> http://rawpedia.rawtherapee.com/How_to_get_LCP_and_DCP_profiles
>
> Tschö,
> Torsten.
>
> --
> Torsten Bronger    Jabber ID: [hidden email]
>
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users

_______________________________________________
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[Torsten Bronger]

Hallöchen!

Gilles Caulier writes:

> digiKam do not distribute these files. In fact i ask about a possible
> way to do it through LensFun.

Difficult.  I thought about adding a downloading/extracting function
to Lensfun's conversion script, but even that is in a legal grey
area I'm afraid.  But I do not know.

Tschö,
Torsten.

--
Torsten Bronger    Jabber ID: [hidden email]

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