:orphan:

.. _examples_gallery:

Examples
========

A gallery of examples and that showcase how scikit-image can be used. Some
examples demonstrate the use of the API in general and some demonstrate specific
applications in tutorial form.

.. hint::

    Check out our :ref:`user_guide` for a narrative
    introduction to key library conventions and basic image manipulation.



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Data
----



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    <div class="sphx-glr-thumbcontainer" tooltip="Most scikit-image functions are compatible with 3D datasets, i.e., images with 3 spatial dimens...">

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  .. image:: /auto_examples/data/images/thumb/sphx_glr_plot_3d_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_data_plot_3d.py`

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      <div class="sphx-glr-thumbnail-title">Datasets with 3 or more spatial dimensions</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The title of each image indicates the name of the function.">

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  .. image:: /auto_examples/data/images/thumb/sphx_glr_plot_scientific_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_data_plot_scientific.py`

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      <div class="sphx-glr-thumbnail-title">Scientific images</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The title of each image indicates the name of the function.">

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  .. image:: /auto_examples/data/images/thumb/sphx_glr_plot_general_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_data_plot_general.py`

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      <div class="sphx-glr-thumbnail-title">General-purpose images</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Specific images">

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  .. image:: /auto_examples/data/images/thumb/sphx_glr_plot_specific_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_data_plot_specific.py`

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      <div class="sphx-glr-thumbnail-title">Specific images</div>
    </div>


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    </div>

Operations on NumPy arrays
--------------------------



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    <div class="sphx-glr-thumbcontainer" tooltip="This script illustrates how to use basic NumPy operations, such as slicing, masking and fancy i...">

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  .. image:: /auto_examples/numpy_operations/images/thumb/sphx_glr_plot_camera_numpy_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_numpy_operations_plot_camera_numpy.py`

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      <div class="sphx-glr-thumbnail-title">Using simple NumPy operations for manipulating images</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to use functions in :pyskimage.morphology to generate footprints (struct...">

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  .. image:: /auto_examples/numpy_operations/images/thumb/sphx_glr_plot_structuring_elements_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_numpy_operations_plot_structuring_elements.py`

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      <div class="sphx-glr-thumbnail-title">Generate footprints (structuring elements)</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example illustrates the use of view_as_blocks from :pyskimage.util.  Block views can be in...">

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  .. image:: /auto_examples/numpy_operations/images/thumb/sphx_glr_plot_view_as_blocks_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_numpy_operations_plot_view_as_blocks.py`

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      <div class="sphx-glr-thumbnail-title">Block views on images/arrays</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Many footprints (structuring elements) can be decomposed into an equivalent series of smaller s...">

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  .. image:: /auto_examples/numpy_operations/images/thumb/sphx_glr_plot_footprint_decompositions_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_numpy_operations_plot_footprint_decompositions.py`

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      <div class="sphx-glr-thumbnail-title">Decompose flat footprints (structuring elements)</div>
    </div>


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    </div>

Manipulating exposure and color channels
----------------------------------------



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    <div class="sphx-glr-thumbcontainer" tooltip="This example converts an image with RGB channels into an image with a single grayscale channel.">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_rgb_to_gray_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_rgb_to_gray.py`

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      <div class="sphx-glr-thumbnail-title">RGB to grayscale</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example illustrates how RGB to HSV (Hue, Saturation, Value) conversion [1]_ can be used to...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_rgb_to_hsv_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_rgb_to_hsv.py`

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      <div class="sphx-glr-thumbnail-title">RGB to HSV</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates the feature of histogram matching. It manipulates the pixels of an in...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_histogram_matching_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_histogram_matching.py`

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      <div class="sphx-glr-thumbnail-title">Histogram matching</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="There are many filters that are designed to work with gray-scale images but not with color imag...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_adapt_rgb_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_adapt_rgb.py`

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      <div class="sphx-glr-thumbnail-title">Adapting gray-scale filters to RGB images</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Here, we use morphological reconstruction to create a background image, which we can subtract f...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_regional_maxima_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_regional_maxima.py`

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      <div class="sphx-glr-thumbnail-title">Filtering regional maxima</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Color deconvolution consists in the separation of features by their colors.">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_ihc_color_separation_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_ihc_color_separation.py`

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      <div class="sphx-glr-thumbnail-title">Separate colors in immunohistochemical staining</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example adjusts image contrast by performing a Gamma and a Logarithmic correction on the i...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_log_gamma_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_log_gamma.py`

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      <div class="sphx-glr-thumbnail-title">Gamma and log contrast adjustment</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This examples enhances an image with low contrast, using a method called histogram equalization...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_equalize_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_equalize.py`

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      <div class="sphx-glr-thumbnail-title">Histogram Equalization</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="It can be useful to artificially tint an image with some color, either to highlight particular ...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_tinting_grayscale_images_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_tinting_grayscale_images.py`

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      <div class="sphx-glr-thumbnail-title">Tinting gray-scale images</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example enhances an image with low contrast, using a method called local histogram equaliz...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_local_equalize_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_local_equalize.py`

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      <div class="sphx-glr-thumbnail-title">Local Histogram Equalization</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Adaptive histogram equalization (AHE) can be used to improve the local contrast of an image [1]...">

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  .. image:: /auto_examples/color_exposure/images/thumb/sphx_glr_plot_adapt_hist_eq_3d_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_color_exposure_plot_adapt_hist_eq_3d.py`

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      <div class="sphx-glr-thumbnail-title">3D adaptive histogram equalization</div>
    </div>


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    </div>

Edges and lines
---------------



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    <div class="sphx-glr-thumbcontainer" tooltip="We use a marching squares method to find constant valued contours in an image. In skimage.measu...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_contours_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_contours.py`

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      <div class="sphx-glr-thumbnail-title">Contour finding</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The convex hull of a binary image is the set of pixels included in the smallest convex polygon ...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_convex_hull_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_convex_hull.py`

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      <div class="sphx-glr-thumbnail-title">Convex Hull</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The Canny filter is a multi-stage edge detector. It uses a filter based on the derivative of a ...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_canny_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_canny.py`

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      <div class="sphx-glr-thumbnail-title">Canny edge detector</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Marching cubes is an algorithm to extract a 2D surface mesh from a 3D volume. This can be conce...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_marching_cubes_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_marching_cubes.py`

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      <div class="sphx-glr-thumbnail-title">Marching Cubes</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The active contour model is a method to fit open or closed splines to lines or edges in an imag...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_active_contours_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_active_contours.py`

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      <div class="sphx-glr-thumbnail-title">Active Contour Model</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Ridge filters can be used to detect ridge-like structures, such as neurites [1]_, tubes [2]_, v...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_ridge_filter_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_ridge_filter.py`

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      <div class="sphx-glr-thumbnail-title">Ridge operators</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to draw several different shapes:">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_shapes_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_shapes.py`

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      <div class="sphx-glr-thumbnail-title">Shapes</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Example of generating random shapes with particular properties.">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_random_shapes_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_random_shapes.py`

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      <div class="sphx-glr-thumbnail-title">Random Shapes</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to approximate (Douglas-Peucker algorithm) and subdivide (B-Splines) pol...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_polygon_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_polygon.py`

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      <div class="sphx-glr-thumbnail-title">Approximate and subdivide polygons</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The Hough transform in its simplest form is a method to detect straight lines [1]_.">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_line_hough_transform_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_line_hough_transform.py`

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      <div class="sphx-glr-thumbnail-title">Straight line Hough transform</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The Hough transform in its simplest form is a method to detect straight lines but it can also b...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_circular_elliptical_hough_transform_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_circular_elliptical_hough_transform.py`

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      <div class="sphx-glr-thumbnail-title">Circular and Elliptical Hough Transforms</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Skeletonization reduces binary objects to 1 pixel wide representations. This can be useful for ...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_skeleton_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_skeleton.py`

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      <div class="sphx-glr-thumbnail-title">Skeletonize</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Edge operators are used in image processing within edge detection algorithms. They are discrete...">

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  .. image:: /auto_examples/edges/images/thumb/sphx_glr_plot_edge_filter_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_edges_plot_edge_filter.py`

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      <div class="sphx-glr-thumbnail-title">Edge operators</div>
    </div>


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    </div>

Geometrical transformations and registration
--------------------------------------------



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    <div class="sphx-glr-thumbnails">


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    <div class="sphx-glr-thumbcontainer" tooltip="Image swirling is a non-linear image deformation that creates a whirlpool effect.  This example...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_swirl_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_swirl.py`

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      <div class="sphx-glr-thumbnail-title">Swirl</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example illustrates the different edge modes available during interpolation in routines su...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_edge_modes_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_edge_modes.py`

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      <div class="sphx-glr-thumbnail-title">Interpolation: Edge Modes</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Rescale operation resizes an image by a given scaling factor. The scaling factor can either be ...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_rescale_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_rescale.py`

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      <div class="sphx-glr-thumbnail-title">Rescale, resize, and downscale</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="The pyramid_gaussian function takes an image and yields successive images shrunk by a constant ...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_pyramid_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_pyramid.py`

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      <div class="sphx-glr-thumbnail-title">Build image pyramids</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to use the Piecewise Affine Transformation.">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_piecewise_affine_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_piecewise_affine.py`

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      <div class="sphx-glr-thumbnail-title">Piecewise Affine Transformation</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we will see how to use geometric transformations in the context of image proce...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_geometric_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_geometric.py`

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      <div class="sphx-glr-thumbnail-title">Using geometric transformations</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="When comparing images, the mean squared error (MSE)--while simple to implement--is not highly i...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_ssim_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_ssim.py`

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      <div class="sphx-glr-thumbnail-title">Structural similarity index</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Homographies are transformations of a Euclidean space that preserve the alignment of points. Sp...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_transform_types_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_transform_types.py`

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      <div class="sphx-glr-thumbnail-title">Types of homographies</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates how to robustly estimate epipolar geometry &lt;https://en.wikipedia.org/...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_fundamental_matrix_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_fundamental_matrix.py`

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      <div class="sphx-glr-thumbnail-title">Fundamental matrix estimation</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="In this example we see how to robustly fit a line model to faulty data using the RANSAC (random...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_ransac_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_ransac.py`

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      <div class="sphx-glr-thumbnail-title">Robust line model estimation using RANSAC</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="In computed tomography, the tomography reconstruction problem is to obtain a tomographic slice ...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_radon_transform_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_radon_transform.py`

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      <div class="sphx-glr-thumbnail-title">Radon transform</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="In this simplified example we first generate two synthetic images as if they were taken from di...">

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  .. image:: /auto_examples/transform/images/thumb/sphx_glr_plot_matching_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_transform_plot_matching.py`

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      <div class="sphx-glr-thumbnail-title">Robust matching using RANSAC</div>
    </div>


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    </div>

Image registration
------------------



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    <div class="sphx-glr-thumbnails">


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    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we use phase cross-correlation to identify the relative shift between two simi...">

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  .. image:: /auto_examples/registration/images/thumb/sphx_glr_plot_register_translation_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_registration_plot_register_translation.py`

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      <div class="sphx-glr-thumbnail-title">Image Registration</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we use the masked normalized cross-correlation to identify the relative shift ...">

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  .. image:: /auto_examples/registration/images/thumb/sphx_glr_plot_masked_register_translation_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_registration_plot_masked_register_translation.py`

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      <div class="sphx-glr-thumbnail-title">Masked Normalized Cross-Correlation</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Demonstration of image registration using optical flow.">

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  .. image:: /auto_examples/registration/images/thumb/sphx_glr_plot_opticalflow_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_registration_plot_opticalflow.py`

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      <div class="sphx-glr-thumbnail-title">Registration using optical flow</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates how a set of images can be assembled under the hypothesis of rigid bo...">

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  .. image:: /auto_examples/registration/images/thumb/sphx_glr_plot_stitching_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_registration_plot_stitching.py`

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      <div class="sphx-glr-thumbnail-title">Assemble images with simple image stitching</div>
    </div>


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    <div class="sphx-glr-thumbcontainer" tooltip="Phase correlation (``registration.phase_cross_correlation``) is an efficient method for determi...">

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  .. image:: /auto_examples/registration/images/thumb/sphx_glr_plot_register_rotation_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_registration_plot_register_rotation.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Using Polar and Log-Polar Transformations for Registration</div>
    </div>


.. raw:: html

    </div>

Filtering and restoration
-------------------------



.. raw:: html

    <div class="sphx-glr-thumbnails">


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to remove small objects from grayscale images. The top-hat transform [1]...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_tophat_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_tophat.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Removing small objects in grayscale images with a top hat filter</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Hysteresis is the lagging of an effect---a kind of inertia. In the context of thresholding, it ...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_hysteresis_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_hysteresis.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Hysteresis thresholding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we deconvolve a noisy version of an image using Wiener and unsupervised Wiener...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_restoration_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_restoration.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Image Deconvolution</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Fast Fourier transforms (FFTs) assume that the data being transformed represent one period of a...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_window_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_window.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Using window functions with images</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example compares the following mean filters of the rank filter package:">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_rank_mean_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_rank_mean.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Mean filters</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Unsharp masking is a linear image processing technique which sharpens the image. The sharp deta...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_unsharp_mask_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_unsharp_mask.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Unsharp masking</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The algorithm is based on a PSF (Point Spread Function), where PSF is described as the impulse ...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_deconvolution_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_deconvolution.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Image Deconvolution</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how the metric implemented in measure.blur_effect behaves, both as a functio...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_blur_effect_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_blur_effect.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Estimate strength of blur</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In information theory, information entropy is the log-base-2 of the number of possible outcomes...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_entropy_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_entropy.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Entropy</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we show how to find an optimally calibrated version of any denoising algorithm...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_j_invariant_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_j_invariant.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Calibrating Denoisers Using J-Invariance</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Inpainting [1]_ is the process of reconstructing lost or deteriorated parts of images and video...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_inpaint_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_inpaint.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Fill in defects with inpainting</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Band-pass filters attenuate signal frequencies outside of a range (band) of interest. In image ...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_dog_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_dog.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Band-pass filtering by Difference of Gaussians</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we denoise a noisy version of a picture using the total variation, bilateral, ...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_denoise_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_denoise.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Denoising a picture</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The discrete wavelet transform is not `shift-invariant`_.  Shift invariance can be achieved thr...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_cycle_spinning_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_cycle_spinning.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Shift-invariant wavelet denoising</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Some signals can only be observed modulo 2*pi, and this can also apply to two- and three dimens...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_phase_unwrap_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_phase_unwrap.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Phase Unwrapping</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we denoise a detail of the astronaut image using the non-local means filter. T...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_nonlocal_means_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_nonlocal_means.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Non-local means denoising for preserving textures</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Attribute operators (or connected operators) [1]_ is a family of contour preserving filtering o...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_attribute_operators_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_attribute_operators.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Attribute operators</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Wavelet denoising relies on the wavelet representation of the image. Gaussian noise tends to be...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_denoise_wavelet_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_denoise_wavelet.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Wavelet denoising</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The Butterworth filter is implemented in the frequency domain and is designed to have no passba...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_butterworth_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_butterworth.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Butterworth Filters</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we show how to find an optimally calibrated version of any denoising algorithm...">

.. only:: html

  .. image:: /auto_examples/filters/images/thumb/sphx_glr_plot_j_invariant_tutorial_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_filters_plot_j_invariant_tutorial.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Full tutorial on calibrating Denoisers Using J-Invariance</div>
    </div>


.. raw:: html

    </div>

Detection of features and objects
---------------------------------



.. raw:: html

    <div class="sphx-glr-thumbnails">


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The DAISY local image descriptor is based on gradient orientation histograms similar to the SIF...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_daisy_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_daisy.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Dense DAISY feature description</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The Histogram of Oriented Gradient (HOG) feature descriptor is popular for object detection [1]...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_hog_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_hog.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Histogram of Oriented Gradients</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Haar-like features are simple digital image features that were introduced in a real-time face d...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_haar_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_haar.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Haar-like feature descriptor</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="We use template matching to identify the occurrence of an image patch (in this case, a sub-imag...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_template_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_template.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Template Matching</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Detect corner points using the Harris corner detector and determine the subpixel position of co...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_corner_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_corner.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Corner detection</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to compute multi-block local binary pattern (MB-LBP) features as well as...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_multiblock_local_binary_pattern_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_multiblock_local_binary_pattern.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Multi-Block Local Binary Pattern for texture classification</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The CENSURE feature detector is a scale-invariant center-surround detector (CENSURE) that claim...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_censure_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_censure.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">CENSURE feature detector</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="We fill holes (i.e. isolated, dark spots) in an image using morphological reconstruction by ero...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_holes_and_peaks_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_holes_and_peaks.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Filling holes and finding peaks</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Blobs are bright on dark or dark on bright regions in an image. In this example, blobs are dete...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_blob_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_blob.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Blob Detection</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates the ORB feature detection and binary description algorithm. It uses a...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_orb_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_orb.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">ORB feature detector and binary descriptor</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="How to build a (bio-plausible) sparse dictionary (or &#x27;codebook&#x27;, or &#x27;filterbank&#x27;) for e.g. imag...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_gabors_from_astronaut_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_gabors_from_astronaut.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Gabors / Primary Visual Cortex "Simple Cells" from an Image</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates the BRIEF binary description algorithm. The descriptor consists of re...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_brief_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_brief.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">BRIEF binary descriptor</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="A Fisher vector is an image feature encoding and quantization technique that can be seen as a s...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_fisher_vector_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_fisher_vector.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Fisher vector feature encoding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates the SIFT feature detection and its description algorithm.">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_sift_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_sift.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">SIFT feature detector and descriptor extractor</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example illustrates texture classification using gray level co-occurrence matrices (GLCMs)...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_glcm_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_glcm.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">GLCM Texture Features</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The shape index is a single valued measure of local curvature, derived from the eigen values of...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_shape_index_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_shape_index.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Shape Index</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Histogram matching can be used for object detection in images [1]_. This example extracts a sin...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_windowed_histogram_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_windowed_histogram.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Sliding window histogram</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we will see how to classify textures based on Gabor filter banks. Frequency an...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_gabor_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_gabor.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Gabor filter banks for texture classification</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we will see how to classify textures based on LBP (Local Binary Pattern). LBP ...">

.. only:: html

  .. image:: /auto_examples/features_detection/images/thumb/sphx_glr_plot_local_binary_pattern_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_features_detection_plot_local_binary_pattern.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Local Binary Pattern for texture classification</div>
    </div>


.. raw:: html

    </div>

Segmentation of objects
-----------------------



.. raw:: html

    <div class="sphx-glr-thumbnails">


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Construct a region boundary RAG with the rag_boundary function. The function  :pyskimage.graph....">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_rag_boundary_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_rag_boundary.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Region Boundary based Region adjacency graphs (RAGs)</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example constructs a Region Adjacency Graph (RAG) and merges regions which are similar in ...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_rag_mean_color_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_rag_mean_color.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Region adjacency graph (RAG) Thresholding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example constructs a Region Adjacency Graph (RAG) and recursively performs a Normalized Cu...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_ncut_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_ncut.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Normalized Cut</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The watershed transform is commonly used as a starting point for many segmentation algorithms. ...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_compact_watershed_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_compact_watershed.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Find Regular Segments Using Compact Watershed</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Thresholding is used to create a binary image from a grayscale image [1]_.">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_thresholding_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_thresholding.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Thresholding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example constructs a Region Adjacency Graph (RAG) and draws it with the rag_draw method.">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_rag_draw_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_rag_draw.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Drawing Region Adjacency Graphs (RAGs)</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The Chan-Vese segmentation algorithm is designed to segment objects without clearly defined bou...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_chan_vese_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_chan_vese.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Chan-Vese Segmentation</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The peak_local_max function returns the coordinates of local peaks (maxima) in an image. Intern...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_peak_local_max_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_peak_local_max.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Finding local maxima</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Niblack and Sauvola thresholds are local thresholding techniques that are useful for images whe...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_niblack_sauvola_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_niblack_sauvola.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Niblack and Sauvola Thresholding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The multi-Otsu threshold [1]_ is a thresholding algorithm that is used to separate the pixels o...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_multiotsu_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_multiotsu.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Multi-Otsu Thresholding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example is about comparing the segmentations obtained using the plain SLIC method [1]_ and...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_mask_slic_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_mask_slic.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Apply maskSLIC vs SLIC</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The random walker algorithm [1]_  determines the segmentation of an image from a set of markers...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_random_walker_segmentation_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_random_walker_segmentation.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Random walker segmentation</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Given several connected components represented by a label image, these connected components can...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_expand_labels_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_expand_labels.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Expand segmentation labels without overlap</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The watershed is a classical algorithm used for segmentation, that is, for separating different...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_watershed_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_watershed.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Watershed segmentation</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The watershed is a classical algorithm used for segmentation, that is, for separating different...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_marked_watershed_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_marked_watershed.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Markers for watershed transform</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to segment an image with image labelling. The following steps are applie...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_label_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_label.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Label image regions</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example compares four popular low-level image segmentation methods.  As it is difficult to...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_segmentations_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_segmentations.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Comparison of segmentation and superpixel algorithms</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="When segmenting an image, you may want to combine multiple alternative segmentations. The :pysk...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_join_segmentations_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_join_segmentations.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Find the intersection of two segmentations</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates the use of the merge_nodes function of a Region Adjacency Graph (RAG)...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_rag_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_rag.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Region Adjacency Graphs (RAGs)</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example constructs a Region Adjacency Graph (RAG) and progressively merges regions that ar...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_rag_merge_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_rag_merge.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Region adjacency graph (RAG) Merging</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we show the error on measuring perimeters, comparing classic approximations an...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_perimeters_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_perimeters.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Measure perimeters with different estimators</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example demonstrates how to perform hierarchical merging on region boundary Region Adjacen...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_boundary_merge_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_boundary_merge.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Hierarchical Merging of Region Boundary RAGs</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="We detect local maxima in a galaxy image. The image is corrupted by noise, generating many loca...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_extrema_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_extrema.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Extrema</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This toy example shows how to compute the size of every labelled region in a series of 10 image...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_regionprops_table_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_regionprops_table.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Explore and visualize region properties with pandas</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to calculate the Hausdorff distance between two sets of points. The Haus...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_hausdorff_distance_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_hausdorff_distance.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Hausdorff Distance</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Morphological Snakes [1]_ are a family of methods for image segmentation. Their behavior is sim...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_morphsnakes_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_morphsnakes.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Morphological Snakes</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="A pixel-based segmentation is computed here using local features based on local intensity, edge...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_trainable_segmentation_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_trainable_segmentation.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Trainable segmentation using local features and random forests</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example shows how to measure properties of labelled image regions. We first analyze an ima...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_regionprops_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_regionprops.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Measure region properties</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Flood fill is an algorithm to identify and/or change adjacent values in an image based on their...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_floodfill_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_floodfill.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Flood Fill</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="When trying out different segmentation methods, how do you know which one is best? If you have ...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_metrics_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_metrics.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Evaluating segmentation metrics</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example shows an illustration of the computation of the Euler number [1]_ in 2D and 3D obj...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_euler_number_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_euler_number.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Euler number</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The rolling-ball algorithm estimates the background intensity of a grayscale image in case of u...">

.. only:: html

  .. image:: /auto_examples/segmentation/images/thumb/sphx_glr_plot_rolling_ball_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_segmentation_plot_rolling_ball.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Use rolling-ball algorithm for estimating background intensity</div>
    </div>


.. raw:: html

    </div>

Longer examples and demonstrations
----------------------------------



.. raw:: html

    <div class="sphx-glr-thumbnails">


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Scikit-image currently doesn&#x27;t feature a function that allows you to write text onto an image. ...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_text_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_text.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Render text onto an image</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This computer vision example shows how to detect faces on an image using object detection frame...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_face_detection_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_face_detection.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Face detection using a cascade classifier</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this tutorial, we explore interactively a biomedical image which has three spatial dimension...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_3d_interaction_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_3d_interaction.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Interact with 3D images (of kidney tissue)</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In various image analysis situations, it is useful to think of the pixels of an image, or of a ...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_pixel_graphs_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_pixel_graphs.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Use pixel graphs to find an object's geodesic center</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Image comparison is particularly useful when performing image processing tasks such as exposure...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_image_comparison_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_image_comparison.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Visual image comparison</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Morphological image processing is a collection of non-linear operations related to the shape or...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_morphology_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_morphology.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Morphological Filtering</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this tutorial, we compute the structure tensor of a 3D image. For a general introduction to ...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_3d_structure_tensor_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_3d_structure_tensor.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Estimate anisotropy in a 3D microscopy image</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we will see how to segment objects from a background. We use the coins image f...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_coins_segmentation_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_coins_segmentation.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Comparing edge-based and region-based segmentation</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we analyze a microscopy image of human cells. We use data provided by Jason Mo...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_human_mitosis_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_human_mitosis.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Segment human cells (in mitosis)</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we demonstrate the use of different metrics to assess the colocalization of tw...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_colocalization_metrics_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_colocalization_metrics.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Colocalization metrics</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Optical coherence tomography (OCT) is a non-invasive imaging technique used by ophthalmologists...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_cornea_spot_inpainting_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_cornea_spot_inpainting.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Restore spotted cornea image with inpainting</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Thresholding is used to create a binary image from a grayscale image [1]_. It is the simplest w...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_thresholding_guide_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_thresholding_guide.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Thresholding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In this example, we identify and track the solid-liquid (S-L) interface in a nickel-based alloy...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_solidification_tracking_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_solidification_tracking.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Track solidification of a metallic alloy</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This example reproduces a well-established workflow in bioimage data analysis for measuring the...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_fluorescence_nuclear_envelope_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_fluorescence_nuclear_envelope.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Measure fluorescence intensity at the nuclear envelope</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Haar-like feature descriptors were successfully used to implement the first real-time face dete...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_haar_extraction_selection_classification_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_haar_extraction_selection_classification.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Face classification using Haar-like feature descriptor</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="This tutorial is an introduction to three-dimensional image processing. For a quick intro to 3D...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_3d_image_processing_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_3d_image_processing.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Explore 3D images (of cells)</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Rank filters are non-linear filters using local gray-level ordering to compute the filtered val...">

.. only:: html

  .. image:: /auto_examples/applications/images/thumb/sphx_glr_plot_rank_filters_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_applications_plot_rank_filters.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Rank filters</div>
    </div>


.. raw:: html

    </div>

Examples for developers
-----------------------
In this folder, we have examples for advanced topics, including detailed
explanations of the inner workings of certain algorithms.

These examples require some basic knowledge of image processing. They are
targeted at existing or would-be scikit-image developers wishing to develop
their knowledge of image processing algorithms.



.. raw:: html

    <div class="sphx-glr-thumbnails">


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="In 1993, Li and Lee proposed a new criterion for finding the &quot;optimal&quot; threshold to distinguish...">

.. only:: html

  .. image:: /auto_examples/developers/images/thumb/sphx_glr_plot_threshold_li_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_developers_plot_threshold_li.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Li thresholding</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The max-tree is a hierarchical representation of an image that is the basis for a large family ...">

.. only:: html

  .. image:: /auto_examples/developers/images/thumb/sphx_glr_plot_max_tree_thumb.png
    :alt:

  :ref:`sphx_glr_auto_examples_developers_plot_max_tree.py`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">Max-tree</div>
    </div>


.. raw:: html

    </div>


.. toctree::
   :hidden:
   :includehidden:


   /auto_examples/data/index.rst
   /auto_examples/numpy_operations/index.rst
   /auto_examples/color_exposure/index.rst
   /auto_examples/edges/index.rst
   /auto_examples/transform/index.rst
   /auto_examples/registration/index.rst
   /auto_examples/filters/index.rst
   /auto_examples/features_detection/index.rst
   /auto_examples/segmentation/index.rst
   /auto_examples/applications/index.rst
   /auto_examples/developers/index.rst


.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-gallery

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

      :download:`Download all examples in Python source code: auto_examples_python.zip </auto_examples/auto_examples_python.zip>`

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

      :download:`Download all examples in Jupyter notebooks: auto_examples_jupyter.zip </auto_examples/auto_examples_jupyter.zip>`


.. only:: html

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

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