MATLAB: I want to rotate a image and calculate its psnr with original image

digital image processingimage processingpsnr calculationrotaterotate image

i want to rotate a image and calculate its psnr with original image

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I will do the googling for you.

https://www.mathworks.com/help/images/ref/imrotate.html

https://www.mathworks.com/help/images/ref/psnr.html

J = imrotate(I, 30)
peaksnr = psnr(J, I)

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MATLAB: Image rotate

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

MATLAB: Rotate image

The default coloring of surf is decided by Z axis value, so MATLAB is behaving as expected. If you want to preserve the original coloring, you need to set CData.

x = (0:0.1:2);
y = (0:0.1:2);
[X,Y] = meshgrid(x,y);
Z = sin(X).*sin(Y);
h = surf(X,Y,Z)
rotate(h,[0,1,0],90,[2,0,0])
set(h,'CData',Z)

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