colour_hdri.tonemapping_operator_exponentiation_mapping

colour_hdri.tonemapping_operator_exponentiation_mapping(RGB, p=1, q=1, colourspace=RGB_Colourspace(sRGB, [[0.64, 0.33, ][0.3, 0.6, ][0.15, 0.06, ]][0.3127, 0.329, ]D65, [[0.4124, 0.3576, 0.1805, ][0.2126, 0.7152, 0.0722, ][0.0193, 0.1192, 0.9505, ]][[3.2406, -1.5372, -0.4986, ][-0.9689, 1.8758, 0.0415, ][0.0557, -0.204, 1.057, ]]<function oetf_sRGB>, <function oetf_reverse_sRGB>, False, False))[source]

Performs given RGB array tonemapping using the exponentiation mapping method.

Parameters:
  • RGB (array_like) – RGB array to perform tonemapping onto.
  • p (numeric, optional) – \(p\).
  • q (numeric, optional) – \(q\).
  • colourspace (colour.RGB_Colourspace, optional) – RGB colourspace used for internal Luminance computation.
Returns:

Tonemapped RGB array.

Return type:

ndarray

References

[Sch94]

Examples

>>> tonemapping_operator_exponentiation_mapping(np.array(
...     [[[0.48046875, 0.35156256, 0.23632812],
...       [1.39843753, 0.55468757, 0.39062594]],
...      [[4.40625388, 2.15625895, 1.34375372],
...       [6.59375023, 3.43751395, 2.21875829]]]))  # doctest: +ELLIPSIS
array([[[ 0.1194997...,  0.0874388...,  0.0587783...],
        [ 0.3478122...,  0.1379590...,  0.0971544...]],
<BLANKLINE>
       [[ 1.0959009...,  0.5362936...,  0.3342115...],
        [ 1.6399638...,  0.8549608...,  0.5518382...]]])