.. _`Color space conversion`:

.. _`syip.color_space_conversion`:

Color space conversion
``````````````````````

.. image:: image_colorspace.svg
   :width: 48


Converts each pixel in a multi-channel image into another colour space




Documentation
:::::::::::::

Algorithms
==========

    **grey2cmap**
        Converts greyscale values after normalization and scaling from 0 - 255 into a matplotlib colourmap.


        :cmap: The colormap to use in conversion


        More info: https://matplotlib.org/examples/color/colormaps_reference.html

    **greyscale**
        Transforms RGB images into greyscale


        :luminance preserving: Use weighted average based on separate luminosity of red-green-blue receptors in human eye.
            Only works for three channel images




    **hsv2rgb**
        Interprets input channels as Hue-Saturation-Value (HSV) and outputs Red-Green-Blue (RGB) channels.



        More info: http://scikit-image.org/docs/0.13.x/api/skimage.color.html#skimage.color.hsv2rgb

    **lab2rgb**
        Interprets input channels as sRGB and outputs CIE LAB channels.


        :illuminant: CIE standard illumination spectrum

        :observer: Aperture angle of observer


        More info: http://scikit-image.org/docs/0.13.x/api/skimage.color.html#skimage.color.rgb2lab

    **rgb2hsv**
        Interprets input channels as Red-Green-Blue (RGB) and outputs Hue-Saturation-Value (HSV) channels.



        More info: http://scikit-image.org/docs/0.13.x/api/skimage.color.html#skimage.color.rgb2hsv

    **rgb2lab**
        Interprets input channels as sRGB and outputs CIE LAB channels.


        :illuminant: CIE standard illumination spectrum

        :observer: Aperture angle of observer


        More info: http://scikit-image.org/docs/0.13.x/api/skimage.color.html#skimage.color.rgb2lab

    **rgb2xyz**
        Interprets input channels as sRGB and outputs CIE XYZ channels.



        More info: http://scikit-image.org/docs/0.13.x/api/skimage.color.html#skimage.color.rgb2xyz

    **xyz2rgb**
        Interprets input channels as CIE XYZ and outputs sRGB channels.



        More info: http://scikit-image.org/docs/0.13.x/api/skimage.color.html#skimage.color.xyz2rgb


Definition
::::::::::


Input ports
===========

    **source**  image
        source image to filter


Output ports
============

    **result**  image
        result after filtering




Configuration
=============

    **Algorithm** (algorithm)
        (no description)
    **cmap** (cmap)
        (no description)
    **illuminant** (illuminant)
        (no description)
    **luminance preserving** (luminance preserving)
        (no description)
    **observer** (observer)
        (no description)









Implementation
==============

.. automodule:: node_colors
    :noindex:

.. class:: ColorSpaceConversion
    :noindex: