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12 lines
366 B
Python
12 lines
366 B
Python
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import numpy as np
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import matplotlib.pyplot as plt
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import matplotlib.image as mpimg
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def rgb2gray(png_file='file_example.png'):
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img = mpimg.imread(png_file)
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gray = np.dot(img[:,:,:3], [0.2989, 0.5870, 0.1140])
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plt.imshow(gray, cmap=plt.get_cmap('gray'), vmin=0, vmax=1)
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plt.axis('off')
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plt.savefig('gray_' + png_file + '.png', dpi=300)
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