Image rotate
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Can I have rotate image with white background
By default if we use imrotate it rotate image with black background can I have rotated image with white background?
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Accepted Answer
Sean de Wolski
on 23 Jun 2011
Irot = imrotate(I,theta);
Mrot = ~imrotate(true(size(I)),theta);
Irot(Mrot&~imclearborder(Mrot)) = 255;
%View 'er
imtool(Irot)
Edited to be more robust/simpler
4 Comments
Leo Wong
on 5 Sep 2018
You are a genius Sean. Your code was the missing piece to complete my project :)
More Answers (2)
Walter Roberson
on 23 Jun 2011
imrotate() always fills with 0.
If your image is floating point, then one way to proceed would be to put a border of NaN around your image, and rotate that. The resulting image should have NaN in it; set the NaN and everything outside to the background color you want.
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