Bug 258992 - Tiff Image with text is displayed and printed blurry
Summary: Tiff Image with text is displayed and printed blurry
Status: CONFIRMED
Alias: None
Product: okular
Classification: Applications
Component: TIFF backend (show other bugs)
Version: 0.19.60
Platform: Debian stable Linux
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-12-06 11:10 UTC by scherer
Modified: 2016-06-21 11:19 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:


Attachments
600dpi Tiff file (183.08 KB, image/tiff)
2010-12-06 11:10 UTC, scherer
Details
Screenshot of gwenview and okular (260.32 KB, image/png)
2010-12-09 14:48 UTC, scherer
Details
PDF print from okular (267.75 KB, application/unknown)
2010-12-15 12:07 UTC, scherer
Details

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Description scherer 2010-12-06 11:10:52 UTC
Created attachment 54197 [details]
600dpi Tiff file

Version:           0.10.5 (using KDE 4.4.5) 
OS:                Linux

By opening a scanned monochrome .tiff file in okular, the font is displayed quite blurry and so it looks like when printing the file. Opening and printing the same file with gwenview leads to a good result.

Reproducible: Always

Steps to Reproduce:
Open the attached file with Okular and open the file with gwenview. Compare the screens and print it from both programs.

Actual Results:  
The okular screen and printing is blurry compared to the gwenview screen and printing which looks quite good.

Expected Results:  
The screen and printout should look the same with both applications.

From a short test with another scanned .tiff I couldn't reproduce the behaviour with a scanning resoltution of 150dpi. The attached file was scanned using 600dpi.
Comment 1 Albert Astals Cid 2010-12-09 00:25:54 UTC
Can you please attach a screenshot pointing the differences?
Comment 2 scherer 2010-12-09 14:48:32 UTC
Created attachment 54359 [details]
Screenshot of gwenview and okular

I attached a screenshot of my Desktop showing the file with okular and gwenview side by side.
Comment 3 Pino Toscano 2010-12-09 19:05:05 UTC
I just wonder, do you have the okular tiff backend installed? (it is part of the okular-extra-backends package)
Comment 4 scherer 2010-12-15 12:07:13 UTC
Created attachment 54581 [details]
PDF print from okular

The okular-extra-backends Package is installed. I removed the Package from the system and tried again, with the same result. So maybe "Component: TIFF backend" is not correct and should be more general? If I print the tiff into a PDF File using cups-pdf the result from okular is attached, same procedure from gwenview looks good.
Comment 5 Albert Astals Cid 2014-05-08 14:05:23 UTC
I can confirm that it looks blurred on screen, i don't have a printer at hand to try to print it. Blurring on screen is basically by antialiasing and i'm not sure "that's a bad thing" in general but i can see how it may make it a bit harder to read for this particular case.
Comment 6 Bart Vaes 2016-06-21 11:19:28 UTC
Been searching for this for ages :/
This bug is still present (using openSUSE 42.1 Leap here).

Printing 600dpi 1bit tiff file from any application (Gimp, Gwenview, cli,...) is ok but Okular prints 'fuzzy' image.
OP stated that there should be text in the document ? In my case it doesn't matter, pure images also print fuzzy.