Bug 138328 - Thumbnail filesize too big
Summary: Thumbnail filesize too big
Status: CONFIRMED
Alias: None
Product: konqueror
Classification: Applications
Component: general (show other bugs)
Version: unspecified
Platform: Ubuntu Linux
: NOR wishlist
Target Milestone: ---
Assignee: Konqueror Developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-12-04 04:26 UTC by kilrae
Modified: 2011-06-03 20:39 UTC (History)
1 user (show)

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Description kilrae 2006-12-04 04:26:28 UTC
Version:            (using KDE KDE 3.5.5)
Installed from:    Ubuntu Packages
OS:                Linux

I have numerous digicam photos of around 100KB apiece (generally 1280x960).  I recently ran out of space in my home folder and discovered that the large previews (256x256 max) stored by KDE are almost the same size.  For example, I have a 600x1076 image at 76KB with a 142x256 preview at 65KB.  In some cases with small images, the thumbnail filesize is actually larger than the original.

This might be a limitation of using PNG.  Testing in the Gimp shows that with full compression the resized image is indeed 65KB when saved as a PNG.  It can be saved as a JPEG with no noticeable loss in quality at as little as 5KB.

Also found this entry for the same problem involving PNG thumbnails in the Wikipedia bugzilla:

http://bugzilla.wikipedia.org/show_bug.cgi?id=1218

Thumbnails should be saved with indexed color, or the option of using JPEG or another format should be offered.