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IDProjectCategoryView StatusLast Update
0014186ScribusImport / Exportpublic2016-09-20 21:59
Reporterjeff Assigned To 
PrioritynormalSeverityminorReproducibilityalways
Status newResolutionopen 
Product Version1.5.3.svn 
Summary0014186: When exporting with a DPI resolution limit, pictures using a "blur" image effect will not be WYSIWYG
DescriptionSee the attached sample file. Exporting with the setting to limit output resolutions to 150dpi will result in a different blur/image than what you see on screen with Scribus. If you export with no compression limitations, the issue does not occur.
TagsNo tags attached.
PatchNo

Activities

jeff

2016-06-26 20:56

reporter  

test-blur.sla (407,012 bytes)

jeff

2016-06-26 20:57

reporter  

jeff

2016-06-26 20:57

reporter  

test-blur-no-res-limit.pdf (1,377,449 bytes)

Herm

2016-09-20 21:59

reporter   ~0042028

This behavior also depends on the chosen DPI value. The lower the DPI, the stronger the blur.

Probably the operations are done in the wrong order: Rescale image to final size, apply effects. For almost all effects this is the right thing to do. It is faster to operate on a small image. However for blur (and probably "sharpen" too) either the radius has to be scaled by the same amount as the image or it has to be applied before rescaling.

Issue History

Date Modified Username Field Change
2016-06-26 20:56 jeff New Issue
2016-06-26 20:56 jeff File Added: test-blur.sla
2016-06-26 20:57 jeff File Added: test-blur-150dpi-limit.pdf
2016-06-26 20:57 jeff File Added: test-blur-no-res-limit.pdf
2016-09-20 21:59 Herm Note Added: 0042028