I can pretty easily blur certain regions of a picture (to confidential information in a screenshot) by smoothly resizing the region to 5% (or 10%) and then scaling it up 2000% (or 1000%) again. There should be a one button press solution that blurs the selected region. Reproducible: Always
You could also try "menu > Selection > More Effects > Soften and Sharpen" with Amount set to -10. It is not a "one button press", but should be faster to use and does not have the size rounding problem. The effect dialog at least remembers the current effect selection, but not the amount value.
Git commit 015d25f5db41b06e27227372917564b413a46b14 by Martin Koller. Committed on 10/08/2016 at 09:19. Pushed by mkoller into branch 'master'. add a "make confidential" action which blurs the image/selection M +9 -9 imagelib/effects/kpEffectBlurSharpen.cpp M +1 -1 imagelib/effects/kpEffectBlurSharpen.h M +2 -1 kolourpaintui.rc M +3 -2 mainWindow/kpMainWindow.h M +2 -1 mainWindow/kpMainWindowPrivate.h M +27 -0 mainWindow/kpMainWindow_Image.cpp http://commits.kde.org/kolourpaint/015d25f5db41b06e27227372917564b413a46b14
*** Bug 421912 has been marked as a duplicate of this bug. ***