As I understand it, Integral Imaging is a way of showing 3-D without the need for special viewing glasses.  Sometimes used in advertising or special effects, it is used much less often in the sciences than any of the methods requiring special viewing glasses, (ex. polarized viewing, stereo angle viewing, or blue-red viewing, or the alternating 60 hertz image viewing .  It is also more challenging to do than any of the methods requiring special glasses.

Integral Imaging requires that several images be taken in an arch pattern around the item being viewed.  Each image is from a differing angle in the arch and must be equidistant from the viewed item with all other images.  Therefore a special camera stand is required which allows the arch camera positioning over the sample.

When these images are printed, they are all printed on the same sheet of printing paper, but each is printed in an arch pattern through a clear, ribbed sheet which acts like a bunch of tiny prisms all parallel with each other.  Printing literally reproduces the various angles used in imaging.  If you note closely any image created this way, it is always displayed through a similar clear, ribbed, prism sheet.  When done correctly, it works very well (meaning the 3-D affect is very good).

The two main advantages: 1. No need for viewing glasses, and  2. A person with only one eye can see the 3-D affect.

Disadvantages:  Time consuming and difficult to do, and it would be extremely difficult to try to create a movie with Integral imaging.  Also, one must move their head laterally, back and forth (in relation to the image), to see and appreciate the 3-D affect.