how to form color 3D image

how we can form and compressed a* 3D image*

Answer 1

[Sean de Wolski]

Please give an example of what you mean:

% red cameraman
I = imread('cameraman.tif');
I = cat(3,I,zeros(size(I,1),size(I,2),2,class(I)));
imshow(I) %I is a 3d image now