[index, map]=rgb2ind(I,65300);
pixels= prod(size(index));
hsv=rgb2hsv(map);
h = hsv(:,1);
s = hsv(:,2);
v = hsv(:,3);
darks = find(v <.2)';
lights = find(s < .05 & v > .85)';
h([darks lights])= -1;
disp(length(darks))
black = length(darks)/pixels;
white = length(lights)/pixels;
red = length(find((h >.9167 | h <=.083) & h~=-1))/pixels;
yellow=length(find(h >.083 & h<=.25))/pixels;
green=length(find(h > .25 & h<= .4167))/pixels;
cyan= length(find(h > .4167 & h<= .5833))/pixels;
blue=length(find(h > .5833 & h <= .75))/pixels;
magenta=length(find(h > .75 & h <= .9167))/pixels;
hold on
fill([0 0 1 1], [0 red red 0], 'r')
fill([1 1 2 2],[0 yellow yellow 0], 'y')
fill([2 2 3 3],[0 green green 0], 'g')
fill([3 3 4 4],[0 cyan cyan 0], 'c')
fill([4 4 5 5],[0 blue blue 0], 'b')
fill([5 5 6 6],[0 magenta magenta 0], 'm')
fill([6 6 7 7],[0 white white 0], 'w')
fill([7 7 8 8],[0 black black 0], 'k')
axis([0 8 0 1])
