[Digikam-devel] [Bug 125387] New: Simulate changes to images only

[Aaron Digulla]

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http://bugs.kde.org/show_bug.cgi?id=125387         
           Summary: Simulate changes to images only
           Product: digikam
           Version: 0.8.1
          Platform: SuSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel kde org
        ReportedBy: digulla hepe com


Version:           0.8.1 (using KDE KDE 3.4.2)
Installed from:    SuSE RPMs

When working with lossy images (JPEG) and when doing small changes, it would be great if digikam didn't actually change the picture but just added a small extra file (a note) with the change. Examples: Saturation, Color enhancements, fixing red eyes, rotation, small changes to the image.

The goal here is to preserve as much of the quality of the original image.

Maybe it would be even better to never change the original image at all (except the operation is known to be lossless) and apply all changed to a kind of matte which is overlayed to the original or, if that's too expensive, always make a backup of the original image when the user attempts to save a change (prefs option). This would be very simple to implement.

Then, a user could experiment for a while and always revert back and start from scratch if the results get too ugly.