3D roataion of image (jpg image)

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

Answer 1

[Chandra Kurniawan]

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);

[slama najla]

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

[Image Analyst]

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.

Answer 2

[Chandra Kurniawan]

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);

Answer 3

[Walter Roberson]

If you want to be able to rotate an image dynamically, then you need to create it as a texture map.

http://www.mathworks.com/help/matlab/visualize/coloring-mesh-and-surface-plots.html#f0-9250