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IDProjectCategoryView StatusDate SubmittedLast Update
0001554ScribusInternalpublic2005-01-17 07:572016-03-30 22:36
Reporterandyprior Assigned To 
PrioritynormalSeverityfeatureReproducibilityalways
Status acknowledgedResolutionopen 
PlatformanyOSanyOS Versionany
Product Version1.3 
Summary0001554: PDF Creation - image downsampling philosophy
DescriptionIn the PDF creation dialogue -
The selection of "image downsampling" results in the downsampling of both imported graphics (e.g. a jpg photo) and images embedded in an imported PDF (e.g. a table from OpenOffice). Subsequently, when viewed on the screen, the downsampled PDF image is of very poor quality and unsuitable for distribution to third parties for screen viewing.

I believe this to be the wrong philosophy. The user should be given the option not to downsample imported pdf images.
Steps To ReproduceCreate 2 graphics boxes, import a high res jpg in one and a pdf table exported from OO in the other (or an eps from OO Draw). Select "PDF creation" dialogue, select "image downsampling", set to 100 dpi. View PDF in Acrobat. Photo is fine but table is dreadful.
Additional InformationIn the file "pdflib.cpp":
Lines (there are 2) "QMIN(Options->PicRes,Options->Resolution)" is responsible for the described behaviour.

For my purposes, I have changed this to read "QMAX(Options->PicRes,
Options->Resolution)".

A proper solution would be to use another check box to control "PicRes".
TagsNo tags attached.
Patch

Relationships

related to 0002745 new PDF Export: Image resampling needs more control over when to resample 
related to 0003560 closedfschmid PDF export should not `upsample' images 
related to 0002277 new Image compression in PDF 
parent of 0003561 feedback Default settings for image export should be more flexible 
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 
Not all the children of this issue are yet resolved or closed.

Activities

plinnell

2005-04-07 20:31

viewer   ~0004129

moving to 1.3+ 1.2.x is now stable

mhanski

2006-04-20 21:35

developer   ~0010209

Reminder sent to: wdobler

what do you think of it?

wdobler

2006-04-27 05:44

reporter   ~0010529

[Sorry for reacting that late -- I was on vacation]
This sounds like a good suggestion.
As long as PDF is imported as raster graphics, _any_ downsampling of imported PDF is problematic; with large images, on the other hand, downsampling can be highly desirable. And these two constraints will frequently meet in the same document.

[I guess issue 0003561 is easier to fix, though, as it is only about defaults in the user interface, whereas this one probably requires tracking of where a raster image came from.]

Issue History

Date Modified Username Field Change
2005-01-17 07:57 andyprior New Issue
2005-04-07 20:31 plinnell Note Added: 0004129
2005-04-07 20:31 plinnell Severity minor => feature
2005-04-07 20:31 plinnell Product Version 1.2.1 => 1.3
2006-04-08 15:19 mhanski Relationship added related to 0002745
2006-04-08 15:20 mhanski Relationship added related to 0003560
2006-04-20 21:33 mhanski Relationship added related to 0003561
2006-04-20 21:34 mhanski OS Linux 2.6 kernel => any
2006-04-20 21:34 mhanski OS Version SuSE 9.2 => any
2006-04-20 21:34 mhanski Platform Athlon 2500+ => any
2006-04-20 21:34 mhanski Build 8 =>
2006-04-20 21:35 mhanski Note Added: 0010209
2006-04-21 13:48 mhanski Relationship added related to 0002486
2006-04-27 05:44 wdobler Note Added: 0010529
2006-04-27 20:58 mhanski Relationship added related to 0003697
2006-04-27 21:11 mhanski Relationship added related to 0003696
2006-05-09 19:47 mhanski Status new => feedback
2006-05-09 19:55 plinnell Relationship replaced parent of 0003561
2006-05-09 20:09 plinnell Status feedback => acknowledged
2016-03-30 22:36 Kunda Relationship added related to 0002277