1 R = 0:255;
 2 
 3 cxyz = makecform('srgb2xyz');
 4 cs = {'lab', 'uvl', 'xyl'};
 5 c = {makecform('xyz2lab'), makecform('xyz2uvl'), makecform('xyz2xyl')};
 6 max1 = ones(3,3)*(-Inf); min1 = ones(3,3)*Inf;
 7 
 8 for i = 1:length(c)
 9     fprintf('%s ...\n', cs{i});
10     for r = R
11         if mod(r, 8) == 0, fprintf('r=%d...\n',r);end
12         [g b] = meshgrid(R,R);
13         rgb = ([r*ones(2^16,1) g(:) b(:)])/255;
14         xyz = applycform(rgb, cxyz);
15         dest = applycform(xyz, c{i});
16         tmpmax = max(dest); tmpmin = min(dest);
17         max1(i,:) = max(max1(i,:), tmpmax);
18         min1(i,:) = min(min1(i,:), tmpmin);
19     end
20 end
21 for i = 1:length(cs)
22     fprintf('\n%s:\n', cs{i});
23     for j = 1:3
24         fprintf('%d: [%.2f, %.2f]\n', j,min1(i,j), max1(i,j));
25     end
26 end