Using 123D Catch iPhone app, I captured a model of my wife Carla, and then took that an made an 8x10" full-color white light hologram from Zebra Imaging:
My thoughts: 123D Catch is pretty easy to use to capture a 3D mesh. Making the hologram from the mesh on 123Dapp.com was pretty easy as well - they interface well with Zebra Imaging. I probably should have fixed up the mesh a bit in Blender or MeshLab, but I had to use a coupon before it expired. The hologram has a kind of "grid" to it, but you don't tend to notice it very much. The hologram is not very efficient, you need to illuminate it with a very bight light to see anything. I ended up purchasing an Ikea Jansjo Desk Work Led Lamp Light, which does a good job of illuminating the hologram because it is a point source, single white LED. Pretty awesome!
Here is what the mesh looked like in MeshLab after I captured it: