[Digikam-devel] [Bug 130733] New: Rotating jpeg images results in smaller file size (ie losless transformation not working)

[J.Westveer]

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http://bugs.kde.org/show_bug.cgi?id=130733         
           Summary: Rotating jpeg images results in smaller file size (ie
                    losless transformation not working)
           Product: digikam
           Version: 0.9.0-svn
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel kde org
        ReportedBy: jwest melaque com


Version:           0.9.0-svn (using KDE 3.5.3, Debian Package 4:3.5.3-1 (testing/unstable))
Compiler:          Target: i486-linux-gnu
OS:                Linux (i686) release 2.6.15-1-686-smp

If I rotate an image in the image/viewer/editor, the resultant file is considerably smaller, although one would expect it to be approximantly the
same size as the original.

ie.  If I rotate this 6.3m photo 180 degrees:
 http://www.netnw.com/PICT6883.JPG

I get this 4.8m photo:
 http://www.netnw.com/PICT6883-090.JPG

If I try version 0.8.2 with the same photo I get this 4.8m photo:
 http://www.netnw.com/PICT6883-0.82.JPG

BUT, if i use jpegtran to rotate the same original photo
I get this 6.3m photo:
 http://www.netnw.com/PICT6883-jpegtran.JPG

The saving image options for jpeg are set to 100.
The kipi losless plugin is enabled.


Thanks for considering this problem.

jjw