Bug 110999 - Pages with inserted PNGs without background show slight grey background in the PNG (PDF, Print)
Summary: Pages with inserted PNGs without background show slight grey background in th...
Status: RESOLVED NOTABUG
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
Version:
(earliest affected)
4.4.3.2 release
Hardware: All Linux (All)
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-08-01 18:24 UTC by Andreas
Modified: 2017-08-04 15:35 UTC (History)
1 user (show)

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Description Andreas 2017-08-01 18:24:15 UTC
Description:
Tested with writer. 
When i insert a PNG file (on purpose, e.g. a scanned signature) without a background, a PDF export file shows still a slight grey background. Also, printings of the .odt file with colour show that grey background.
Even a PNG with a paper white background will produce that grey background.
That makes an signature looking ugly and non professional.

Steps to Reproduce:
1.Create a PNG(e.g. a handwritten signature) without background
2.Insert it in a L.O.writer page
3.export to PDF or print the page in colour mode

Actual Results:  
Instead of only seeing the signature alone, you will see the signature with a grey background in size of the whole PNG

Expected Results:
I want to only see the handwritten signature 


Reproducible: Always

User Profile Reset: No, i happens on may three different Linux PCs

Additional Info:


User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0
Comment 1 Xisco Faulí 2017-08-02 17:59:42 UTC Comment hidden (obsolete)
Comment 2 Andreas 2017-08-04 15:35:36 UTC
Note a bug!
Problem occurs when the background of a Picture e.g. JPEG is removed with GIMP, by using "Colour to Alpha" which is translated in German as "Colour to transparence". If you use that function and export the picture as an PNG File without a background it seems to work. I used my scanned signature that way with Microsoft Word (at work) for years. But you have delete the background explicitly in Gimp to make it work as desired. It's been my fault, but I wanted only to help, by reporting that bug
Sorry!