imresize in 3D

Hello,

I want to resize an image from 3D smaller dimension to larger dimension.
i.e for example from 40x40x30 to 40x120x90. The normal matlab function just
resizes image in 2D. 

Thanks

Sylvia wrote:
> Hello,
> 
> I want to resize an image from 3D smaller dimension to larger dimension.
> i.e for example from 40x40x30 to 40x120x90. The normal matlab function just
> resizes image in 2D. 

You'll probably need to write the function yourself. What kind of 
interpolation do you plan to use?

If you really mean 40x[something] to 40x[something else], that's a 2D 
resizing on each of 40 planes.

Jerry
-- 
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������

If I want to resize image from dimensions Nx x Ny x Nz to Na x Nb x Nc
where Nx, Ny and Nz are all different from Na, Nb and Nc respectively, now
if for each Nz index plane, i can resize Nx x Ny to Na x Nb dimension,
after this step I get dimensions Na x Nb x Nz, after that for each Na
plane, I resize Nb x Nz to Nb x Nc. In the end I will have the resized
image Na x Nb x Nc. My question is: is this two step approach correct? any
other alternative?

Thanks

>Sylvia wrote:
>> Hello,
>> 
>> I want to resize an image from 3D smaller dimension to larger
dimension.
>> i.e for example from 40x40x30 to 40x120x90. The normal matlab function
just
>> resizes image in 2D. 
>
>You'll probably need to write the function yourself. What kind of 
>interpolation do you plan to use?
>
>If you really mean 40x[something] to 40x[something else], that's a 2D 
>resizing on each of 40 planes.
>
>Jerry
>-- 
>Engineering is the art of making what you want from things you can get.
>�����������������������������������������������������������������������
>

Sylvia wrote:
> If I want to resize image from dimensions Nx x Ny x Nz to Na x Nb x Nc
> where Nx, Ny and Nz are all different from Na, Nb and Nc respectively, now
> if for each Nz index plane, i can resize Nx x Ny to Na x Nb dimension,
> after this step I get dimensions Na x Nb x Nz, after that for each Na
> plane, I resize Nb x Nz to Nb x Nc. In the end I will have the resized
> image Na x Nb x Nc. My question is: is this two step approach correct? any
> other alternative?

When the details are exposed, probably not, but a nice library routine 
could hide them. I haven't convinced myself that the final result isn't 
dependent on the order of transformations.

Jerry
-- 
Engineering is the art of making what you want from things you can get.
�����������������������������������������������������������������������

>Hello,
>
>I want to resize an image from 3D smaller dimension to larger dimension.
>i.e for example from 40x40x30 to 40x120x90. The normal matlab function
just
>resizes image in 2D. 
>
>Thanks
>

I'm not sure if it'll temporarily go float, but you might look at
interp3.

http://www.mathworks.com/access/helpdesk/help/techdoc/ref/interp3.html