Making algorithms at least 3D, preferably nD

[Ankit Agrawal]

Hi all,

     I guess I need some clarification what nD images exactly mean. For 3D, 
these are the following ways I can think of it --
1. RGB image (n x m x 3) : Total m*n pixels
2. Series of grey-scale images (m x n x p): Total p images each with m*n 
pixels
3. A grey-scale(m x n x 2) or an RGB image(m x n x 4) with depth value at 
each pixel like a Pointcloud(http://pointclouds.org/)?

Can you please elaborate which of the above(or something different) is 
meant as nD in this discussion?

@Marianne
Can you point out to the category that you meant with your images of the 
dimensions (512, 1536, 21)?

Regards,
Ankit Agrawal,
Communication and Signal Processing,
IIT Bombay.

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