colour_hdri.tonemapping_operator_gamma#

colour_hdri.tonemapping_operator_gamma(RGB: ArrayLike, gamma: float = 1, EV: float = 0) → NDArrayFloat[source]#

Perform given RGB array tonemapping using the gamma and exposure correction method.

Parameters:

  • RGB (ArrayLike) – RGB array to perform tonemapping onto.

  • gamma (float) – \(\gamma\) correction value.

  • EV (float) – Exposure adjustment value.

Returns:

Tonemapped RGB array.

Return type:

numpy.ndarray

References

[BADC11b]

Examples

>>> tonemapping_operator_gamma(
...     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],
...             ],
...         ]
...     ),
...     1.0,
...     -3.0,
... )  
array([[[ 0.0600585...,  0.0439453...,  0.0295410...],
        [ 0.1748046...,  0.0693359...,  0.0488282...]],

       [[ 0.5507817...,  0.2695323...,  0.1679692...],
        [ 0.8242187...,  0.4296892...,  0.2773447...]]])