Random Dot Stereograms

The principles of random dot stereograms were first invented by Prof. B. Julesz in early 1960s who made the dual image random dot stereograms.  In 1989, Prof. C. W. Tyler made a significant improvement  to produce single image random dot stereogra (RDS) which are now found in many popular 3D pictures books around the world (see TIME (1994) Oct.3, p.52). Dynamic or time-evolving RDS are also possible and they can be used to display the motion of surface waves.

Circular Cosine Well A Text Stereogram
Floating Donut HKIEd
Eye on Gorilla
Crabs in Spiral

The technology for constructing those 3D pictures could be applied in the following areas:-

  • Research, Education and Industry: 3D mechanical model, electronic circuit board, architectural model, R&D and educational demonstration model with 3D viewing.
  • Information and encryption: protection of data storage.
  • Medicine and Psychology: a very useful tool for Visual Science research as well as the brain behaviour research.
  • Fine Art: 3D pictures, postcards, design, advertising, wallpaper, tiles.
There are two usual ways to view the stereograms which must be viewed horizontally:
  • Wall-eyed (or Far-eyed) Viewing Method
  • X-eyed (Cross-eyed) Viewing Method
About 10% of the population are always unable to view the stereograms because of their eye defect or other reasons.

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