Single Image Random Dot Stereogram definition graphics
(SIRDS, originally "autostereogram") A stereogram
composed of (coloured) dots which when viewed correctly appears three-dimensional. SIRDs were invented by Dr. Christoper Tyler, Associate Director of the Smith-Kettlewell Eye Research Institute in San Francisco (1999).
FAQ (http://cs.waikato.ac.nz/~singlis/sirds.html). Nice pictures (http://eleves.ens.fr:8080/home/massimin/index.ang.html). Picture Gallery (http://h2.ph.man.ac.uk/gareth/sirds.html). Vern Hart's SIRDS Gallery (http://vern.com/). SGI Gallery (http://sgi.com/free/gallery.html).