About
Background on Vischeck, Daltonize and Tinyeyes.
What is it?
Vischeck is a webpage for simulating and correcting color vision deficiencies. Daltonize corrects images to make them more visible to colorblind people. Tinyeyes simulates infant vision.People
Vischeck was originally launched in 2000 by Robert Dougherty and Alex Wade. In those days we were both post-docs at Stanford. Bob now works for Soundtrip Health and Alex is at the University of York.This is a rebuild of the original site. We’ve switched to a client-side JavaScript implementation rather than running it through a DSL link to a P200 server in Bob's basement in Menlo Park.
The TinyEyes team also includes Heidi Baseler (University of York).
Áine Dineen at Trinity College Dublin generously provided the Pytorch implementation .
Algorithms
The Colorblindness simulator implements the Brettel/Vienot/Mollon LMS projection algorithm for dichromatic vision. See Brettel, Viénot, and Mollon (1997), Computerized simulation of color appearance for dichromats.
The Daltonize option applies an opponent-space correction that increases L–M contrast and projects it into the L+M and S channels to preserve information that would otherwise be lost or hard to see.
Daltonize was built in May 2002; the earliest archived snapshot we’ve found is June 2002 on the Wayback Machine.
The TinyEyes simulator applies age-dependent Gaussian blur in opponent space (L+M, L–M, S), derived from developmental vision estimates.
Source code for this repo: github.com/wadelab/VischeckTinyeyes
Code from the original Vischeck simulation is now in GIMP.
Contact: vischeck@vischeck.com