Random colormap for matplotli

random.py

import matplotlib,numpy
import pylab
# A random colormap for matplotlib
cmap = matplotlib.colors.ListedColormap ( numpy.random.rand ( 256,3))
pylab.imshow ( Z, cmap = cmap)
pylab.show()

This is a random colormap for matplotlib, quite useful for segmentation displays and stuff

slick!

Try the following if you want a randomly shuffled version of an existing colormap (might be useful to avoid potentially bad colors from using purely random RGB values):

import numpy as np
import matplotlib.pyplot as plt
vals = np.linspace(0,1,256)
np.random.shuffle(vals)
cmap = plt.cm.colors.ListedColormap(plt.cm.jet(vals))

replacing jet with the colormap of your choice.

hello. If you have a way to perform the same operation in opencv, i'm really interested ! (cmap isn't a proper opencv colormap)

Brilliant, even better than glasbey on ImageJ

This is awesome, very helpful. Thank you!