.. 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_sharpen.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_sharpen.py>`
        to download the full example code.

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

.. _sphx_glr_advanced_image_processing_auto_examples_plot_sharpen.py:


Image sharpening
=================

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

.. GENERATED FROM PYTHON SOURCE LINES 8-34



.. image-sg:: /advanced/image_processing/auto_examples/images/sphx_glr_plot_sharpen_001.png
   :alt: plot sharpen
   :srcset: /advanced/image_processing/auto_examples/images/sphx_glr_plot_sharpen_001.png
   :class: sphx-glr-single-img





.. code-block:: Python


    import scipy as sp
    import matplotlib.pyplot as plt

    f = sp.datasets.face(gray=True).astype(float)
    blurred_f = sp.ndimage.gaussian_filter(f, 3)

    filter_blurred_f = sp.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="gray")
    plt.axis("off")
    plt.subplot(132)
    plt.imshow(blurred_f, cmap="gray")
    plt.axis("off")
    plt.subplot(133)
    plt.imshow(sharpened, cmap="gray")
    plt.axis("off")

    plt.tight_layout()
    plt.show()


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

   **Total running time of the script:** (0 minutes 0.538 seconds)


.. _sphx_glr_download_advanced_image_processing_auto_examples_plot_sharpen.py:

.. only:: html

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

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

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

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

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

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

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


.. only:: html

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

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