.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "_gallery/feature_demo/image_stitching.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download__gallery_feature_demo_image_stitching.py>`
        to download the full example code.

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

.. _sphx_glr__gallery_feature_demo_image_stitching.py:


Image stitching
===============

Show stitching of images using weighted alpha mode. The alpha value of the
images are used as weights.

.. GENERATED FROM PYTHON SOURCE LINES 8-77



.. image-sg:: /_gallery/feature_demo/images/sphx_glr_image_stitching_001.webp
   :alt: image stitching
   :srcset: /_gallery/feature_demo/images/sphx_glr_image_stitching_001.webp
   :class: sphx-glr-single-img


.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    Imageio: 'wood.jpg' was not found on your computer; downloading it now.
    Try 1. Download from https://github.com/imageio/imageio-binaries/raw/master/images/wood.jpg (97 kB)
    Downloading: 8192/98922 bytes (8.3%)98922/98922 bytes (100.0%)
      Done
    File saved as /home/docs/.imageio/images/wood.jpg.






|

.. code-block:: Python



    import imageio.v3 as iio
    from rendercanvas.auto import RenderCanvas, loop
    import pygfx as gfx
    import numpy as np

    canvas = RenderCanvas()
    renderer = gfx.renderers.WgpuRenderer(canvas)
    scene = gfx.Scene()
    scene.add(gfx.Background.from_color("#000"))


    def create_texcoords_array(ny, nx):
        texcoord_x = np.linspace(0, 1, nx, dtype="f4")
        texcoord_y = np.linspace(0, 1, ny, dtype="f4")
        return np.stack(np.meshgrid(texcoord_x, texcoord_y), axis=2)


    def create_pyramid_weights(ny, nx):
        texcoords = create_texcoords_array(ny, nx)
        center_coords = 1 - np.abs(texcoords * 2 - 1)
        return center_coords.min(axis=2)


    x = 0
    for image_name in ["wood.jpg", "bricks.jpg"]:
        rgb = iio.imread(f"imageio:{image_name}")[:, :, :3]  # Drop alpha if it has it
        rgba = np.empty((*rgb.shape[:2], 4), np.uint8)
        weights = create_pyramid_weights(*rgb.shape[:2])
        weights = (weights * 255).astype("u1")
        rgba = np.dstack([rgb, weights])
        image = gfx.Image(
            gfx.Geometry(grid=gfx.Texture(rgba, dim=2)),
            gfx.ImageBasicMaterial(
                clim=(0, 255),
                alpha_mode="weighted_solid",
                depth_write=False,
            ),
        )
        scene.add(image)
        image.local.x = x
        x += rgba.shape[1] - 200

    # Text is rendered as an overlay (using render_queue)
    text = gfx.Text(
        "Image stitching",
        font_size=64,
        anchor="top-left",
        material=gfx.TextMaterial(color="#fff", aa=True),
    )
    text.material.render_queue = 4000  # render the text as an overlay
    text.local.scale_y = -1
    scene.add(text)

    camera = gfx.OrthographicCamera()
    camera.local.scale_y = -1
    camera.show_object(scene, match_aspect=True, scale=1.05)

    controller = gfx.PanZoomController(camera, register_events=renderer)


    def animate():
        renderer.render(scene, camera)


    if __name__ == "__main__":
        canvas.request_draw(animate)
        loop.run()


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

   **Total running time of the script:** (0 minutes 1.005 seconds)


.. _sphx_glr_download__gallery_feature_demo_image_stitching.py:

.. only:: html

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

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

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

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

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

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

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


.. only:: html

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

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

.. only:: html

    Interactive example
    -------------------

    Try this example in your browser using Pyodide. Might not work with all examples and all devices. Check the output and your browser's console for details.

    .. raw:: html

        <iframe src="./../pyodide.html#image_stitching.py"></iframe>