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dwblair/cmap2LUT.py

Created August 1, 2013 20:07
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Generating a LUT in the format "DN,R,G,B" from the colormap data structure used by matplotlib.
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cmap2LUT.py
import matplotlib as mpl
import matplotlib.cm as cm
import numpy as np
norm = mpl.colors.Normalize(vmin=0, vmax=255)
cmap = cm.spectral
m = cm.ScalarMappable(norm=norm, cmap=cmap)
for i in range(0,256):
vals=m.to_rgba(i)
print str(i) + "," + str(int(vals[0]*255)) + "," + str(int(vals[1]*255))+","+str(int(vals[2]*255))
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