Vision Science on Computers (VSOC) Project

VNS for Windows now available -- August 5, 1999

Programs here will probably continue to run under Windows for some time, but for Macs, their days are numbered. Mac version of the programs are from the days of MacOS 8, and will run within the Classic environment of MacOS X on PowerPC based hardware. However, there is no Classic environment for the Intel version of MacOS X. There is no way to update these programs. So, these snapshots from 1999 are the last versions of these programs. There is no source code to speak of in the first place. For your curiosity as to why, they were developed using an interactive software development environment called mTropolis, which was killed a long time ago. Also see this. (Note added in May 2006)

Berkeley VSOC project has been established to deliver computer-based educational tools for vision science.  Our first project is Gabori Attack, a contrast sensitivity test program that is presented as a video game.  We have also released VNS, a real-time visual neuron simulator. This allows you to explore receptive fields of artificial visual neurons almost as if you are playing with real neurons in the brain.

Project Organizer: Izumi Ohzawa.



Projects
  1. Gabori Attack  (Contrast Sensitivity Game)
  2. VNS (Visual Neuron Simulator) 


Gabori Attack
[version 0.9, 1999-06-02]

Summary

Gabori Attack is a program for testing contrast sensitivity functions.  It is presented as a video game that even a 4-5 year-old can play, but is also instructive for college-level students.  The task is to squish "Gaboris" that slowly emerge from the gray background as quickly as possible with mouse clicks. Due to uncertainty of the position, spatial frequency, and reaction time delay, it tends to underestimate contrast sensitivity.  Therefore, contrast sensitivity functions obtained will be shifted downward compared with those measured by more rigorous methods.

Disclaimer

Gabori Attack is an educational tool and comes with NO WARRANTY.  It has NOT been designed or scientifically tested for use in clinical diagnostics or vision screening for job and drivers license applicants.  Any uses other than instructional uses are strongly discouraged.

Download

Notes Installation and Startup

MacOS:
Dowloading the above file with MS InternetExplorer should create a self-extracting StuffIt archive named GaboriInstaller.sea in the download directory or the DeskTop.  Double-clicking on it should automatically create a folder "Gabori Attack".  Inside this folder, there is a file indicated by a Gabor function icon.  This is the game program.

Windows:
Download the ZIP file from the above link.  Unzipping it will create a folder named "Gabori".  Double-clicking on the gabori.exe icon will start up the program.
 

Bugs

Design Team




VNS (Visual Neuron Simulator) 
[version 0.8, 1999-08-05]

Summary

VNS is a real-time visual neuron simulator. This allows you to explore receptive fields of artificial visual neurons almost as if you are playing with real neurons in the brain..

Download

Notes and Documentation
(Please also see README in the package.)

Design Team



(last modified: 2004)