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How is it possible to encrypt multiple images using fresnel transform and inverse the operation to de-multiplex those images?

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    $\begingroup$ Is that physics. It does not sound like physics. $\endgroup$ – Frédéric Grosshans Mar 18 '11 at 18:35
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The particular application the OP is asking about might be better on Theoretical Computer Science or Math, but the long and the short of it comes down to three properties of the transform

To this we add two facts concerning holograms...

  • Holograms represent a Fresnel transform of the a three dimensional data set into a two dimensional representation.
  • If we voxelize a 3D space we get a stack of pixelized 2D images (though I imagine this necessitates finding a discrete version of the transform, but that is old hat in numeric analysis).

...and it's obvious, right?

::phew!::

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