The module provides biological visual systems models (human visual system and others). It also provides derivated objects that take advantage of those bio-inspired models.
Note that some sliders are made available to allow you to play with luminance compression.
If not using the 'fast' option, then, tone mapping is performed using the full retina model [Benoit2010]_. It includes spectral whitening that allows luminance energy to be reduced. When using the 'fast' option, then, a simpler method is used, it is an adaptation of the algorithm presented in [Meylan2007]_. This method gives also good results and is faster to process but it sometimes requires some more parameters adjustement.