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

    Click :ref:`here <sphx_glr_download_auto_examples_transform_plot_edge_modes.py>` to download the full example code
.. rst-class:: sphx-glr-example-title

.. _sphx_glr_auto_examples_transform_plot_edge_modes.py:


=========================
Interpolation: Edge Modes
=========================

This example illustrates the different edge modes available during
interpolation in routines such as :py:func:`skimage.transform.rescale`
and :py:func:`skimage.transform.resize`.




.. image:: /auto_examples/transform/images/sphx_glr_plot_edge_modes_001.png
    :class: sphx-glr-single-img





.. code-block:: python

    import numpy as np
    import matplotlib.pyplot as plt

    from skimage.util import pad


    img = np.zeros((16, 16))
    img[:8, :8] += 1
    img[:4, :4] += 1
    img[:2, :2] += 1
    img[:1, :1] += 2
    img[8, 8] = 4

    modes = ['constant', 'edge', 'wrap', 'reflect', 'symmetric']
    fig, axes = plt.subplots(2, 3)
    ax = axes.flatten()

    for n, mode in enumerate(modes):
        img_padded = pad(img, pad_width=img.shape[0], mode=mode)
        ax[n].imshow(img_padded, cmap=plt.cm.gray, interpolation='nearest')
        ax[n].plot([15.5, 15.5, 31.5, 31.5, 15.5],
                   [15.5, 31.5, 31.5, 15.5, 15.5], 'y--', linewidth=0.5)
        ax[n].set_title(mode)

    for a in ax:
        a.set_axis_off()
        a.set_aspect('equal')

    plt.tight_layout()
    plt.show()

**Total running time of the script:** ( 0 minutes  0.464 seconds)


.. _sphx_glr_download_auto_examples_transform_plot_edge_modes.py:


.. only :: html

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



  .. container:: sphx-glr-download

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



  .. container:: sphx-glr-download

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


.. only:: html

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

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