VIS CAPSTONE ADDRESS
Self-Illustrating Phenomena
Pat Hanrahan (Stanford University)

A self-illustrating phenomenon is an image which exposes the science behind it. (I first saw this term in H. Robin's book, "The Scientific Image"). Some famous examples are pictures of iron filings aligned along magnetic lines of force, sand particles collecting at the stationary points of the standing waves of a violin, stress in a mechanical part revealed through birefringence, and particle tracks in a bubble chamber. Such images brilliantly combine experimental design, analysis, and visualization. Quoting J. Tukey, "the general purposes of conducting experiments and analyzing data match, point by point." I will argue in this talk that computer tools for visual analysis should normally be conceived of as aids in constructing computational visual experiments; and that the resulting visualizations be consciously designed to help validate or invalidate the hypothesis being tested by the experiment.