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

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

.. _sphx_glr_advanced_image_processing_auto_examples_plot_measure_data.py:


Measurements from images
==========================

This examples shows how to measure quantities from various images.

.. GENERATED FROM PYTHON SOURCE LINES 8-44



.. image-sg:: /advanced/image_processing/auto_examples/images/sphx_glr_plot_measure_data_001.png
   :alt: plot measure data
   :srcset: /advanced/image_processing/auto_examples/images/sphx_glr_plot_measure_data_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)
    n = 10
    l = 256
    im = np.zeros((l, l))
    points = l * rng.random((2, n**2))
    im[(points[0]).astype(int), (points[1]).astype(int)] = 1
    im = sp.ndimage.gaussian_filter(im, sigma=l / (4.0 * n))

    mask = im > im.mean()

    label_im, nb_labels = sp.ndimage.label(mask)

    sizes = sp.ndimage.sum(mask, label_im, range(nb_labels + 1))
    mask_size = sizes < 1000
    remove_pixel = mask_size[label_im]
    label_im[remove_pixel] = 0
    labels = np.unique(label_im)
    label_clean = np.searchsorted(labels, label_im)


    plt.figure(figsize=(6, 3))

    plt.subplot(121)
    plt.imshow(label_im, cmap="nipy_spectral")
    plt.axis("off")
    plt.subplot(122)
    plt.imshow(label_clean, vmax=nb_labels, cmap="nipy_spectral")
    plt.axis("off")

    plt.subplots_adjust(wspace=0.01, hspace=0.01, top=1, bottom=0, left=0, right=1)
    plt.show()


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

   **Total running time of the script:** (0 minutes 0.033 seconds)


.. _sphx_glr_download_advanced_image_processing_auto_examples_plot_measure_data.py:

.. only:: html

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

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

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

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

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

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

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


.. only:: html

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

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