.. _sphx_glr_auto_examples_features_detection:

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>


.. toctree::
   :hidden:

   /auto_examples/features_detection/plot_daisy
   /auto_examples/features_detection/plot_hog
   /auto_examples/features_detection/plot_haar
   /auto_examples/features_detection/plot_template
   /auto_examples/features_detection/plot_corner
   /auto_examples/features_detection/plot_multiblock_local_binary_pattern
   /auto_examples/features_detection/plot_censure
   /auto_examples/features_detection/plot_holes_and_peaks
   /auto_examples/features_detection/plot_blob
   /auto_examples/features_detection/plot_orb
   /auto_examples/features_detection/plot_gabors_from_astronaut
   /auto_examples/features_detection/plot_brief
   /auto_examples/features_detection/plot_fisher_vector
   /auto_examples/features_detection/plot_sift
   /auto_examples/features_detection/plot_glcm
   /auto_examples/features_detection/plot_shape_index
   /auto_examples/features_detection/plot_windowed_histogram
   /auto_examples/features_detection/plot_gabor
   /auto_examples/features_detection/plot_local_binary_pattern