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[Octave-bug-tracker] [bug #54309] Internal transparent area of png image


From: Carnë Draug
Subject: [Octave-bug-tracker] [bug #54309] Internal transparent area of png image is loaded as border color by imread
Date: Sat, 14 Jul 2018 18:17:28 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0

Update of bug #54309 (project octave):

                  Status:               Confirmed => Invalid                
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #6:

>  In the read image the internal transparent area is wrongly not transparent,
but has the (red) color of the border. 

This is not a bug, this is the way it's supposed to work. The transparency of
a pixel and the colour value of that pixel are separate things. Even if a
pixel is meant to be transparent, it still needs a colour value. You need to
read the transparency separately (3rd output argument of imread) and then
decide how to display that transparency.

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Reply to this item at:

  <http://savannah.gnu.org/bugs/?54309>

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