Autostereogram help

[inverse-actuality]

I think this belongs here, it is a form of art depending on how you look at it. Sorry if it dont belong here but anyway i was hoping i could find someone who could teach me how to make autostereograms. I would apreciate help on any type of autostereogram, although i am more interested in random dot autostereograms rather than textile autostereograms.
Things that would help me would be like
How to create them
Information on how they work
Links with information
Basicaly any information on autostereograms