This corner is a collection of color vision
related materials. Most of them are the tools and results of Biyee's ongoing
exploration in the color vision land. It is the author's hope that sharing
these materials will be a small contribution to the understanding of color
vision, application of color vision knowledge in the real world and helping
people with color vision deficiency.
Guideline
1931
CIE Diagrams remain the commonly accepted language (not necessarily the best one) to describe
colors quantitatively.
This site frequently uses color monitor to present color objects. CIE diagram is the foundation for building this site and
they are essential for understanding many materials of this site.
Copunctal Points are
essential for creating confusion lines for dichromats (people who have only
two types of cones instead of three that normal people have). Each type of dichromat has on copunctal point.
Confusion Lines are
the lines in a color space such as CIE chromaticity diagram on which colors
are not distinguishable to corresponding dichromats. Each type of dichromat has its confusion line.
Color Vision Test is an online
test based on Confusion Lines
It tests different types of color vision deficiencies: tritanopia - blue blindness
which is very rare, deuteranopia - green blindness, protanopia - red
blindness. The latter two are more common and are difficult to
distinguish from one another by quick test such as this one.
Spectral Curves compare two sets of spectral
curves (e.g. color matching functions, cone fundamentals).
Color Space explains color space and the rationale
behind using CIE 1931 color space on this site.
Color appearance simulation
expresses the author's view on color apperance simulation and poses some questions
about the current technology in this area.
VPMODEL is a product of the author's Ph.D.
thesis work in mid 90s. It is mainly for studying why animals have
different types of color visions. However it has many tools to deal
with underwater spectral irradiance change, spectral reflectance, target radiance,
photopigments' spectral absorptance, etc.
Benham's Top is one of the interesting
subject color phenomena.
