The Free On-line Dictionary of Computing (30 December 2018):

Single Image Random Dot Stereogram
autostereogram
rastergram
SIRDS

    (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).

   (1996-11-06)