[prev in list] [next in list] [prev in thread] [next in thread] 

List:       kde-bugs-dist
Subject:    [Bug 148649] New: DigiKam needs a better image scaler
From:       Dik Takken <d.h.j.takken () phys ! uu ! nl>
Date:       2007-08-08 19:00:51
Message-ID: 20070808210049.148649.d.h.j.takken () phys ! uu ! nl
[Download RAW message or body]

------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.
         
http://bugs.kde.org/show_bug.cgi?id=148649         
           Summary: DigiKam needs a better image scaler
           Product: digikam
           Version: unspecified
          Platform: Gentoo Packages
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel kde org
        ReportedBy: d.h.j.takken phys uu nl


Version:           0.9.2 (using KDE KDE 3.5.7)
Installed from:    Gentoo Packages
OS:                Linux

Large images that are downscaled to fit the window are too soft. This does not only \
reduce the perception of the actual level of detail in the image, but it also changes \
the perception of color. I don't know why the perceived color changes, but it does.

I was just comparing color managed display in both CinePaint and DigiKam. Both \
applications had the image scaled to fit the window. The image in CinePaint looked \
slightly warmer than the same image in DigiKam. I was just tearing my hair out to \
find the cause of the problem, and I almost submitted a bugreport about the mismatch. \
Also, the image in DigiKam looked relatively soft.

After applying unsharp masking on the image in DigiKam, both sharpness and color \
matched the CinePaint result.

It looks like the choice of scaler used for image display is more important than I \
would have guessed... Maybe the scaler from CinePaint can be duplicated to DigiKam?


[prev in list] [next in list] [prev in thread] [next in thread]