Image sharpening

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

../../../_images/plot_sharpen_1.png

Python ソースコード: plot_sharpen.py

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 example: 0.53 seconds ( 0 minutes 0.53 seconds)