can't save image with transparent background

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Chong Hou
Chong Hou 2011-4-20
评论： Nicolette 2023-3-17
I want to save some figure I draw into png format with transparent background. I set the background to transparent by using 'color' property and I do see the figure shown has a transparent background. The only problem is that when i save the image, the image background is not transparent any more (I put the image in a powerpoint to test the transparency). The code is as follow:
%SAVE IMAGE
image=gcf;
%set(image,'color','none');
saveas(image,'test','png');
Can anyone tell me what's wrong here and what I can do to correct this? Thanks!

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回答（3 个）

Matt Fig
Matt Fig 2011-4-20
I don't know what you are doing wrong but I rarely ever rely on MATLAB to get these kinds of things right. I use this instead: export_fig
Kaustubha Govind
Kaustubha Govind 2011-4-20
cui,xingxing
cui,xingxing 2021-8-30
Ran in:
since Matlab R2020a, use "exportgraphics", for example ,you can do like this
x = 0:.1:2*pi;
y = sin(x);
% save to transparented image
figure;
plot(x,y,'LineWidth',4);
set(gcf, 'color', 'none');
set(gca, 'color', 'none');
exportgraphics(gcf,'transparent.eps',... % since R2020a
'ContentType','vector',...
'BackgroundColor','none')

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