Equalizing the histogram of an imageΒΆ

Histogram equalizing makes images have a uniform histogram.

Python source code: plot_equalize_hist.py

from skimage import data, exposure
import matplotlib.pyplot as plt
camera = data.camera()
camera_equalized = exposure.equalize_hist(camera)
plt.figure(figsize=(7, 3))
plt.subplot(121)
plt.imshow(camera, cmap='gray', interpolation='nearest')
plt.axis('off')
plt.subplot(122)
plt.imshow(camera_equalized, cmap='gray', interpolation='nearest')
plt.axis('off')
plt.tight_layout()
plt.show()