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IDProjectCategoryView StatusLast Update
0002745ScribusImport / Exportpublic2006-04-27 06:58
ReporterringercAssigned To 
Status newResolutionopen 
PlatformanyOSanyOS Versionany
Product Version1.3 
Summary0002745: PDF Export: Image resampling needs more control over when to resample
DescriptionCurrently, users are given the option to resample all images to x dpi, or not to resample at all. This isn't going to be flexible enough for most.

Ideally, there would be options to control greyscale, colour, and possibly mono (I'm not sure the latter is actually needed) image resampling independently, with a threshold as well as a sample rate.

For example, I might need to resample colour images above 240dpi down to 200dpi, resample greyscale images above 600dpi to 300dpi, and resample mono images above 1200dpi to 900dpi.

Control over different image types is necessary because they take different amounts of space, suffer differently from resampling and compression, and thus need different decisions made about them.

A threshold is needed because if I have a 220dpi image, in most cases resampling it to 200dpi will hurt its quality much more than it'll save me in size. It's generally better to avoid resampling images close to, but still somewhat above, the target DPI. It needs to be configurable because people's needs for this vary , but it should probably default to 10% or 20% above the current resample threshold.

The threshold would also ensure that low res images were not upsampled.
TagsNo tags attached.


related to 0003561 feedback Default settings for image export should be more flexible 
related to 0002279 confirmed relation eps-resolution/resample-resolution 
related to 0001554 acknowledged PDF Creation - image downsampling philosophy 
related to 0002486 closed Change meaning of "Quality" in PDF Export 
related to 0003697 closedcbradney PDF-Export / General / GroupBox "Image Compression method" 
related to 0003696 closedplinnell Tooltip PDF-Export / General / Compression Method: Remove confusing info from tooltip 
related to 0005533 closed Exported PDF with resample option... bigger 


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Issue History

Date Modified Username Field Change
2005-10-20 11:48 ringerc New Issue
2005-10-20 12:19 ringerc Relationship added related to 0002279
2006-01-16 22:52 plinnell Product Version 1.3.2cvs => 1.3
2006-04-08 15:19 mhanski Relationship added related to 0001554
2006-04-14 20:17 mhanski Relationship added related to 0003561
2006-04-21 13:54 mhanski Relationship added related to 0002486
2006-04-27 06:58 mhanski OS Fedora Core => any
2006-04-27 06:58 mhanski OS Version 3 => any
2006-04-27 06:58 mhanski Platform x86 Linux => any
2006-04-27 20:57 mhanski Relationship added related to 0003697
2006-04-27 21:10 mhanski Relationship added related to 0003696
2007-04-06 13:30 mhanski Relationship added related to 0005533