colour_hdri.absolute_luminance_calibration_Lagarde2016#

colour_hdri.absolute_luminance_calibration_Lagarde2016(RGB: ArrayLike, measured_illuminance: float, colourspace: RGB_Colourspace = RGB_COLOURSPACES['sRGB']) → NDArrayFloat[source]#

Perform absolute Luminance calibration of given RGB panoramic image using Lagarde (2016) method.

Parameters:

  • RGB (ArrayLike) – RGB panoramic image to calibrate.

  • measured_illuminance (float) – Measured illuminance \(E_v\).

  • colourspace (RGB_Colourspace) – RGB colourspace used for internal Luminance computation.

Returns:

Absolute Luminance calibrated RGB panoramic image.

Return type:

numpy.ndarray

Examples

>>> RGB = np.ones((4, 8, 3))
>>> absolute_luminance_calibration_Lagarde2016(  
...     RGB, 500
... )
array([[[ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...]],

       [[ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...]],

       [[ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...]],

       [[ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...],
        [ 233.9912506...,  233.9912506...,  233.9912506...]]])