def iacolormap(type='gray'):
from Numeric import sqrt, transpose, resize, reshape, NewAxis, concatenate, arange, ones, zeros, matrixmultiply
import colorsys
if type == 'gray':
ct = transpose(resize(arange(256), (3,256)))
elif type == 'hsv':
h = arange(256)/255.
s = ones(256)
v = ones(256)
ct = ianormalize(reshape(map(colorsys.hsv_to_rgb, h, s, v), (256,3)), [0,255]).astype('b')
elif type == 'hot':
n = 1.*int(3./8*256)
r = concatenate((arange(1,n+1)/n, ones(256-n)), 1)[:,NewAxis]
g = concatenate((zeros(n), arange(1,n+1)/n, ones(256-2*n)), 1)[:,NewAxis]
b = concatenate((zeros(2*n), arange(1,256-2*n+1)/(256-2*n)), 1)[:,NewAxis]
ct = ianormalize(concatenate((r,g,b), 1), [0,255]).astype('b')
elif type == 'cool':
r = (arange(256)/255.)[:,NewAxis]
ct = ianormalize(concatenate((r, 1-r, ones((256,1))), 1), [0,255]).astype('b')
elif type == 'bone':
ct = ianormalize((7*iacolormap('gray') + iacolormap('hot')[:,::-1]) / 8., [0,255]).astype('b')
elif type == 'copper':
ct = ianormalize(min(1, matrixmultiply(iacolormap('gray')/255., [[1.25,0,0],[0,0.7812,0],[0,0,0.4975]])), [0,255]).astype('b')
elif type == 'pink':
ct = ianormalize(sqrt((2*iacolormap('gray') + iacolormap('hot')) / 3), [0,255]).astype('b')
else:
ct = zeros((256,3))
return ct
