[Matplotlib-users] read a png image with alpha gives uncorrect colors

PBrockmann Patrick.Brockmann at lsce.ipsl.fr
Fri Sep 11 17:39:53 CEST 2015


I have encountered a problem with this simplified code where I produce 
a windrose with some alpha level. 
Then read this png image to check.
Then discover that the colors are not correct.

What is the mistake ?
I am puzzled.

I use matplotlib 1.4.3

The correct windrose with alpha colors

The read png image.


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