3rd Annual Dinner and Demo Night

Monday, May 9, 2005, 7:00 -9:30 pm, G.WIZ Science Museum

The third annual VSS Demo Night is a social event with a barbecue and refreshments to accompany the presentations of demos. There will be 20 demos presented in a variety of formats from laptop displays to room installations, organized by Richard Brown, San Francisco Exploratorium and Shinsuke Shimojo, California Institute of Technology. These presentations highlight the importance of demonstrations of visual phenomena in vision research and education, and provide a forum for sharing techniques and tips for developing effective demonstrations. In addition, G.WIZ features many interactive exhibits on optics and vision, including a traveling NEI exhibition and exhibits on loan from the Exploratorium, which will also be available to use during this event. There is no additional registration required, just come on over to G.WIZ, and enjoy!

BBQ and sodas are complimentary. Beer and wine: $2. Your first drink is on VSS – pick up your free drink
ticket at the front door.

LITE Vision: An Atlas of Visual Phenomena

Kenneth Brecher
Over 200 visual phenomena, spanning color, motion, depth, lightness and form, are presented on an interactive educational website.

MT Illusory Motion After-Effect

Tuan Cao-Huu
A demonstration and analysis of optical imaging studies of illusory motion after-effects will be presented.

Mach Card With Isoluminant Targets

Alan Gilchrist
A folded Mach card with two apertures, whose perceived shape flips between monocular and binocular viewing, demonstrates 3-D context effects in lightness.

Staircase Gelb Effect

Alan Gilchrist
Black and grey squares suspended in midair and illuminated by a spotlight provide a compelling demonstration of the Gelb Effect in perceived lightness.

The Enigmatic Enigma and Related Phenomena

Kai Hamburger and Simone Gori
New, more impressive variations of Leviant’s Enigma figure (traffic-illusion) and other related phenomena will be presented.


Thorsten Hansen
Color images resembling a natural spectral distribution of 1/(f^n) are temporally modulated by different noise processes to create appealing color landscapes.

Undefeatable Rock Paper Scissors

John Jacobson
A computer program learns to repeatedly defeat human opponents in Rock Paper Scissors, even though it is seen to move first.

Waving Illusion Produced By The Peripheral Drift Illusion

Akiyoshi Kitaoka
A novel static image provides a really waving appearance, based on the peripheral drift motion illusion.

Physics Education Courseware – Integrating Virtual-Reality-Simulations and Real Experiments

Maria Kozhevnikov
A VR interface is used in conjunction with real experiments in mechanics, in individual and collaborative tasks, to study new approaches in science education.

Change Blindness to Gradual Changes: A New Example

Cedric Laloyaux, Christel Devue, Elodie David and Axel Cleeremans
This new example of change blindness extends previous findings to the psychologically important domain of
emotional facial expressions.

Motion Induction by Walking

Songjoo Oh
Walking disambiguates flickering gratings positioned in ground locations such that the grating appears move
opposite the walker’s direction.

McGill Colour Calibrated Image Database

Adriana Olmos
The McGill Colour Calibrated Image Database will be presented, with some demos showing its use in analyzing the chromatic and luminance channels.


Baingio Pinna
Presentation of visual illusions.

Head-mounted VR

Matthias Pusch
Users will walk through a variety of virtual environments and phenomena, among them a virtual city, using an
interactive, immersive, high-resolution VR display.


Adam Shavit, W. Li & L. Matin
A small pitchroom without a floor will be installed. Rotating it will induce large geometric illusions and errors in manual localization.

Posture-dependent Tilted Room

Shinsuke Shimojo, Noriyuki Tanaka, and Shana Mabari
A new and unique variation of the tilted room will be demonstrated in which the perceived tilt depends critically on the observer’s posture.

Failure of Binocular Noise Cancellation

Bill Simpson
This demonstration shows that binocular combination of contrast does not use an algorithm anything like addition.
Pure First-, Second-, and Third-order Motion


George Sperling
Examples of stimuli that excite only the first-, only the second-, and only the third-order motion systems will be displayed on a laptop computer screen.

The First Stereoscopic Stimulus Ever Seen

Hadley Tassinari
A point source of light and an aluminum disk recreate Wheatstone’s observation of an illusory tilted line passing through the disk.

“Stereoscopic” Perspective

Christopher Tyler
High-resolution perspective images viewed from their center of projection give a sense of depth as vivid as that obtained from binocular stereopsis.