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why does whiteness show up ? !

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Mayssa
Mayssa 2015-8-21
评论： Star Strider 2015-8-22
I saved an image in my file using "saveas" and I have used those instructions
DirectoryPath =('C:\Users\Mayssa\Desktop\pfe\Matlab\interface');
whereToStore=fullfile(DirectoryPath,a);
saveas(gcf, whereToStore);
But when I try to read it (with imread) it shows up on a a white background, how can I get rid of it ? :(

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回答（3 个）

Star Strider
Star Strider 2015-8-21
From the saveas documentation:
  • If you do not specify an extension, then saveas saves the figure to a FIG-file.
Instead of imread, see if openfig works.
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Mayssa
Mayssa 2015-8-22
编辑：Mayssa 2015-8-22
@Star Strider, It does work for me too, but in my code I am plotting over an image texture than saving the whole in another image.
Star Strider
Star Strider 2015-8-22
Try this:
figure(1)
plot(-10:10, exp(-([-10:10]/5).^2))
saveas(gcf, '#TestSAVEAS_01.png');
figure(2)
plot(-10:10, 1-exp(-([-10:10]/5).^2))
saveas(gcf, '#TestSAVEAS_02.png');
A = imread('#TestSAVEAS_01.png');
B = imread('#TestSAVEAS_02.png');
figure(2)
image(uint8((double(A)/2 + double(B)/2)))
hold on
hold off
title('Retrieved & Combined Images')
delete('#TestSAVEAS_01.png')
delete('#TestSAVEAS_02.png')

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Walter Roberson
Walter Roberson 2015-8-21
Image Analyst
Image Analyst 2015-8-21

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