Rotate 3D (512*512*512 double) matrix

Hi. I have a 3D matrix in double type (512*512*512 double) and I want to rotate 30 degree anticlockwise around central z-axis. Can anyone please give me an idea how to do this? Many thanks,

[Matt J]

Where is the "central z-axis" in the coordinates of your 3D grid? Which way does it point?

Answer 1

[Walter Roberson]

The easiest way is to slice it into panes and rotate each pane and reassemble.

[Yilong Zhang]

Thank you for your answer. Do you mean to rotate each 2D matrix (x and y), then assemble a 3D matrix (x, y, z)? I can do that but I want to rotate the 2D image around central vertical line rather than around central horizontal line (function like 'imrotate' ). Can you please let me know which function is workable? Thank you.

[Walter Roberson]

for k=512:-1:1
  newimg(k, :, :) = imrotate(squeeze(img(k, :, :), Angle)) ;
end

[Yilong Zhang]

Yes! it works. Thank you so much!

Answer 2

[Matt J]

order=[3,1,2];  %example

A=permute(yourMatrix,order);

A=imrotate(A,30);

A=ipermute(A,order);

[Yilong Zhang]

Thank you for your help,Matt. I have tried the code and it works well!