[Bug 149284] New: digikam resize should bin pixels together

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[Bug 149284] New: digikam resize should bin pixels together

Bugzilla from luke.campagnola@gmail.com
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http://bugs.kde.org/show_bug.cgi?id=149284         
           Summary: digikam resize should bin pixels together
           Product: digikam
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel kde org
        ReportedBy: luke.campagnola gmail com


Version:           0.9.2-final (using KDE 3.5.7, Kubuntu (gutsy) 4:3.5.7-1ubuntu13)
Compiler:          Target: x86_64-linux-gnu
OS:                Linux (x86_64) release 2.6.20-16-generic

When I scale images down, I generally expect the noise to get smaller, but it appears that the scaling algorithm digikam uses (Editor -> Transform -> Resize) does not bin pixels together, resulting in the same level of noise, and in some cases aliasing.
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[Bug 149284] digikam resize should bin pixels together

Bugzilla from florian-evers@gmx.de
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------- Additional Comments From florian-evers gmx de  2007-10-03 19:24 -------
If you want to say that digikam does not perform anti-alias filtering during rescaling (scalig down) then I have to confirm this bug.

The resize dialog was changed in order to add CIMG-support. Since then, the filtering is not working any more.

IMHO it would be nice to let the user choose which filtering algorithm he prefers (bicubic, sinc,...). Instead, the user sees LOTS and LOTS of mystic parameters in the CIMG dialog... not nice.

Just my $0.02
Florian
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[Bug 149284] digikam resize should bin pixels together

Bugzilla from florian-evers@gmx.de
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------- Additional Comments From florian-evers gmx de  2007-10-03 19:30 -------
Hi again,

I think that this is a regression since 0.9.2 and should not be treated as a WISH. Before introducing CIMG, this was working very well :-)

Regards,
Florian
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[Bug 149284] digikam resize should bin pixels together

Gilles Caulier-4
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caulier.gilles gmail com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |Image Editor



------- Additional Comments From caulier.gilles gmail com  2007-10-03 20:25 -------
Florian,

This is not a regression. If you don't use the Cimg filter, the algorithm to resize an image is exactly the same than before (0.9.0, 0.9.1) !

Gilles
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[Bug 149284] digikam resize should bin pixels together

Arnd Baecker
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------- Additional Comments From arnd.baecker web de  2007-11-13 14:45 -------
This bug is surely related to (if not the same)
http://bugs.kde.org/show_bug.cgi?id=152192 .
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[Bug 149284] digikam resize should bin pixels together

Arnd Baecker
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------- Additional Comments From arnd.baecker web de  2007-11-27 09:17 -------
Luke, Florian, http://bugs.kde.org/show_bug.cgi?id=152192 
has been solved now. Could you please check if this bug can be closed
as well?

Thanks a lot in advance, Arnd
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[Bug 149284] digikam resize should bin pixels together

Bugzilla from florian-evers@gmx.de
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------- Additional Comments From florian-evers gmx de  2007-11-28 22:38 -------
Hi Arnd,

thank you for the link, it describes exactly what I wanted to communicate. IMHO you can close this bug here :-)

Greetings,
Florian
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[Bug 149284] digikam resize should bin pixels together

Arnd Baecker
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arnd.baecker web de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED



------- Additional Comments From arnd.baecker web de  2007-11-28 22:42 -------
Florian, thanks a lot for the feedback! Closing this bug as FIXED.
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