.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "advanced/image_processing/auto_examples/plot_face_denoise.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_advanced_image_processing_auto_examples_plot_face_denoise.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_advanced_image_processing_auto_examples_plot_face_denoise.py:


Image denoising
================

This example demoes image denoising on a Raccoon face.

.. GENERATED FROM PYTHON SOURCE LINES 7-40



.. image-sg:: /advanced/image_processing/auto_examples/images/sphx_glr_plot_face_denoise_001.png
   :alt: noisy, Gaussian filter, Median filter
   :srcset: /advanced/image_processing/auto_examples/images/sphx_glr_plot_face_denoise_001.png
   :class: sphx-glr-single-img





.. code-block:: Python


    import numpy as np
    import scipy as sp
    import matplotlib.pyplot as plt

    rng = np.random.default_rng(27446968)

    f = sp.datasets.face(gray=True)
    f = f[230:290, 220:320]

    noisy = f + 0.4 * f.std() * rng.random(f.shape)

    gauss_denoised = sp.ndimage.gaussian_filter(noisy, 2)
    med_denoised = sp.ndimage.median_filter(noisy, 3)


    plt.figure(figsize=(12, 2.8))

    plt.subplot(131)
    plt.imshow(noisy, cmap="gray", vmin=40, vmax=220)
    plt.axis("off")
    plt.title("noisy", fontsize=20)
    plt.subplot(132)
    plt.imshow(gauss_denoised, cmap="gray", vmin=40, vmax=220)
    plt.axis("off")
    plt.title("Gaussian filter", fontsize=20)
    plt.subplot(133)
    plt.imshow(med_denoised, cmap="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()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.217 seconds)


.. _sphx_glr_download_advanced_image_processing_auto_examples_plot_face_denoise.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: plot_face_denoise.ipynb <plot_face_denoise.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: plot_face_denoise.py <plot_face_denoise.py>`

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: plot_face_denoise.zip <plot_face_denoise.zip>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_