Logo looks different after uploading

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Franta Cymorek
Franta Cymorek 2017-4-4
评论： Franta Cymorek 2017-4-4
As you can see in the first picture, that is a logo I want to upload to my Matlab GUI. But after uploading it changes - it's rendered with a black color, or I would say it uses a black color as a backround (right down corner).
The code I'm using:
axes(handles.axes13)
imshow('logo4.png')
To fix it I have tried:
axes(handles.axes13)
set(gca,'color','none')
imshow('logo4.png')
But doesn't work. Could you please help me out?

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采纳的回答

Guillaume
Guillaume 2017-4-4
PNG images can have transparency information embedded in them and yours does. However, you discard it with your imshow call.
axes(handles.axes13)
[cdata, ~, transparency] = imread('logo4.png'); %get transparency
himg = imshow(cdata);
himg.AlphaData = alpha; %apply transparency to the image.
However, note that the background colour will be that of the figure, not the axes since imshow makes the axes not visible.
  1 个评论
Franta Cymorek
Franta Cymorek 2017-4-4
I have a different working solution, but still a big thanks for your help!

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