2.6.8.11. Image denoisingΒΆ

This example demoes image denoising on a Racoon face.

../../../_images/sphx_glr_plot_face_denoise_001.png
import numpy as np
import scipy
import scipy.misc
from scipy import ndimage
import matplotlib.pyplot as plt
f = scipy.misc.face(gray=True)
f = f[230:290, 220:320]
noisy = f + 0.4*f.std()*np.random.random(f.shape)
gauss_denoised = ndimage.gaussian_filter(noisy, 2)
med_denoised = ndimage.median_filter(noisy, 3)
plt.figure(figsize=(12,2.8))
plt.subplot(131)
plt.imshow(noisy, cmap=plt.cm.gray, vmin=40, vmax=220)
plt.axis('off')
plt.title('noisy', fontsize=20)
plt.subplot(132)
plt.imshow(gauss_denoised, cmap=plt.cm.gray, vmin=40, vmax=220)
plt.axis('off')
plt.title('Gaussian filter', fontsize=20)
plt.subplot(133)
plt.imshow(med_denoised, cmap=plt.cm.gray, vmin=40, vmax=220)
plt.axis('off')
plt.title('Median filter', fontsize=20)
plt.subplots_adjust(wspace=0.02, hspace=0.02, top=0.9, bottom=0, left=0,
right=1)
plt.show()

Total running time of the script: ( 0 minutes 0.254 seconds)

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