CSE 457: Introduction to Computer Graphics
Project 3: Trace - SIRDS explanation
Most of you by now have encountered stereogram images before,
but perhaps you're still wondering how they work. This document will try to
explain the principle of Single Image Random Dot Stereogram (SIRDS)
, and also give you some hints as to how to implement the Stereogram Generation
Bell & Whistle for project 3.
How to view
3D stereograms take a little practice to see because you have to become a
contortionist with your eyes - well, its not quite that bad. To see a
stereogram you must:
- look beyond the image plane so that your eyes converge somewhere
behind the paper, or the computer screen in this case. You can
achieve this by 'relaxing' your eyes.
- maintain focus on the stereogram (not the same as converging your eyes
on the stereogram), so you can make out the pattern of the Random dots
on the screen, which as you will read, actually 'encodes' the
3D-perceived data for the stereogram. Until you achieve focus on the
stereogram, this pattern will be too blurry to convey the ed
information to you
- if at first you don't succeed...