3D roataion of image (jpg image)

Question

L 2012-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/27049-3d-roataion-of-image-jpg-image

移动：DGM 2023-2-20

Dear All,

How can I rotate in 3D the jpg image in Matlab. The imrotate does it only in 2D? I found the rotate function and 3D rotate, but I don't know could I use these 2 functions for this problem! Thank You in advance!

Laslo

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Answer 1

Chandra Kurniawan 2012-1-25

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Hi,

in Matlab R20011a, I don't face any problem with imrotate to rotate 3D image

I = imread('football.jpg'); %3D image
J = imrotate(I,30);
imshow(J);

But, you also can rotate it by :

I = imread('football.jpg'); %3D image
s = 30;
J(:,:,1) = imrotate(I(:,:,1),s);
J(:,:,2) = imrotate(I(:,:,2),s);
J(:,:,3) = imrotate(I(:,:,3),s);
imshow(J);

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slama najla 2012-6-16

移动：DGM 2023-2-20

hello i try imrotate us on 2d but it change the size of the 3d image, is it normal or no

Image Analyst 2012-6-16

移动：DGM 2023-2-20

If you didn't clip the rotated image to the canvass, but instead enlarged the canvass, it might appear to be shrunk because it may fit the enlarged canvass into the same display area.

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Answer 2

Chandra Kurniawan 2012-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/27049-3d-roataion-of-image-jpg-image#answer_35226

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Hi, I have read your message to my email.

I see your problem.

Imrotate cannot rotate an image in z - direction.

Please try imtransform instead.

Maybe this helps.

Eq:

I = imread('football.jpg');
Dorig = [0 0; 1 0; 1 1; 0 1];
Dtrans = [-4 2; -8 -3; -3 -5; 6 3];
tform = maketform('projective',Dorig,Dtrans);
B = imtransform(I,tform,'udata',[0 1],'vdata',[0 1],'size',size(I));
imshow(B);