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habi/rgb2gray.py

Created January 27, 2014 15:34
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Convert an Image from RGB to monochrome, based on the formula from https://en.wikipedia.org/wiki/Grayscale#Converting_color_to_grayscale
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rgb2gray.py
import numpy as np
def rgb2gray(rgb):
'''
convert an image from rgb to grayscale
http://stackoverflow.com/a/12201744/323100
'''
return numpy.dot(rgb[..., :3], [0.299, 0.587, 0.144])
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