709 |
|
|
710 |
Even though the CIE $L^*a^*b^*$ \cite{cie86colorimetry} color space |
Even though the CIE $L^*a^*b^*$ \cite{cie86colorimetry} color space |
711 |
is fairly perceptually uniform, it is not good for selecting |
is fairly perceptually uniform, it is not good for selecting |
712 |
random colors: |
random colors (cf. \cite{healey96choosing}): |
713 |
using a uniformly chosen hue angle |
using a uniformly chosen hue angle |
714 |
produces too much blue and too little yellow |
produces too much blue and too little yellow |
715 |
for high $L^*$. |
for high $L^*$. |
716 |
Because of this, we use a different color circle |
Because of this, we use a different color circle |
717 |
with seven evenly spaced ``primary'' hues (RGB, CMY and orange). |
with seven evenly spaced ``primary'' hues (RGB, CMY and orange). |
718 |
% |
% |
719 |
Studies of color distance, linear separation, and color category |
% healey96choosing: |
720 |
\cite{healey96choosing} have also yielded similarly biased hue spacing |
% Studies of color distance, linear separation, and color category |
721 |
for maximised discriminability. |
% - notes regarding color naming study result table: |
722 |
XXX |
% - orange is clearly perceived as a distinct color |
723 |
|
% - a large range of hues is perceived as blue |
724 |
|
% - many different names for hues of magenta (pink, purple, magenta) |
725 |
|
% - a maximum of seven colors seems to be easily discriminable; |
726 |
|
% - the 7 colors reached by maximising discriminability are in fact |
727 |
|
% very close to our RGB, CMY, orange colors |
728 |
|
|
729 |
|
|
730 |
% To balance the blue bias, we use seven primaries |
% To balance the blue bias, we use seven primaries |
731 |
% with orange added between the usual hues |
% with orange added between the usual hues |