2.6.8.7. Image sharpeningΒΆ

This example shows how to sharpen an image in noiseless situation by applying the filter inverse to the blur.

../../../_images/sphx_glr_plot_sharpen_001.png
import scipy
from scipy import ndimage
import matplotlib.pyplot as plt
f = scipy.misc.face(gray=True).astype(float)
blurred_f = ndimage.gaussian_filter(f, 3)
filter_blurred_f = ndimage.gaussian_filter(blurred_f, 1)
alpha = 30
sharpened = blurred_f + alpha * (blurred_f - filter_blurred_f)
plt.figure(figsize=(12, 4))
plt.subplot(131)
plt.imshow(f, cmap=plt.cm.gray)
plt.axis('off')
plt.subplot(132)
plt.imshow(blurred_f, cmap=plt.cm.gray)
plt.axis('off')
plt.subplot(133)
plt.imshow(sharpened, cmap=plt.cm.gray)
plt.axis('off')
plt.tight_layout()
plt.show()

Total running time of the script: ( 0 minutes 0.425 seconds)

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