.. meta::
    :description: Code snippets discrete LUT

How to create a discrete LUT and apply it to a Channel
======================================================

In this example, we will apply a Lookup Table to a Channel called ``channel`` to a scene::

    import numpy as np
    from ORSServiceClass.ORSWidget.orslutwidget.orslutlogic import OrsLUTLogic

    lutName = 'a LUT Name'
    aLUT = OrsLUTLogic.createLUT(lutName)
    aLUT.setIsDiscrete(True)
    aLUT.setTableSize(channel.getMaximumValue())
    for i in range(np.int(channel.getMaximumValue() + 1)):
        r, g, b = np.random.rand(3)
        color = Color(r, g, b, 1.0)
        aLUT.setColorAtIndex(i, color)

    lutUUID = OrsLUTLogic.getLUTUUID(aLUT)

Then use the snippet of :ref:`add_LUT_to_dataset_on_view` to apply this LUT to a channel.