colour_hdri.image_stack_to_radiance_image¶
-
colour_hdri.
image_stack_to_radiance_image
(image_stack, weighting_function=<function weighting_function_Debevec1997>, weighting_average=False, camera_response_functions=None)[source]¶ Generates a HDRI / radiance image from given image stack.
- Parameters
image_stack (colour_hdri.ImageStack) – Stack of single channel or multi-channel floating point images. The stack is assumed to be representing linear values except if
camera_response_functions
argument is provided.weighting_function (callable, optional) – Weighting function \(w\).
weighting_average (bool, optional) – Enables weighting function \(w\) computation on channels average instead of on a per channel basis.
camera_response_functions (array_like, optional) – Camera response functions \(g(z)\) of the imaging system / camera if the stack is representing non linear values.
- Returns
Radiance image.
- Return type
ndarray
Warning
If the image stack contains images with negative or equal to zero values, unpredictable results may occur and NaNs might be generated. It is thus recommended to encode the images in a wider RGB colourspace or clamp negative values.
References