https://bugs.kde.org/show_bug.cgi?id=388067

            Bug ID: 388067
           Summary: Image Editor preview / apply processes image twice?
           Product: digikam
           Version: 5.6.0
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: ImageEditor-Tool-Sharpen
          Assignee: digikam-bugs-n...@kde.org
          Reporter: roger.f...@gmail.com
  Target Milestone: ---

When I use the Enhance / Sharpening filter in the Image Editor, it takes a
while for the preview to show the effect of my settings - especially when I use
the Estimate Noise option.
When I click OK to apply the filter, digikam runs the sharpening filter again. 
I will have to wait again for the estimation and then application.

However, if I dont't change any settings but simply accept what the preview is
showing, couldn't digikam just save the image generated for the Preview?
It always feels like I'm applying the filter one time more than required.

I'm asking because to me it seems the Preview takes just as long as the
application of the filter, which suggest the Preview doesn't just do the
sharpening on a part of the entire picture.

If I'm wrong about this then feel free to close the issue.

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