exrpptm(1)exrpptm(1)NAMEexrpptm - performs tone mapping on an OpenEXR image (photoreceptor)
SYNOPSISexrpptm [options] input.exr output.exr
DESCRIPTION
Performs the tone mapping function described in this paper:
Erik Reinhard and Kate Devlin. Dynamic Range Reduction Inspired by
Photoreceptor Physiology. IEEE Transactions on Visualization and Com‐
puter Graphics (2004).
The input image should be normalized, and the output file returned by
this function should also be normalized before viewing.
OPTIONS-f Controls the intensity of the resulting image. Valid range is
from -8 to 8, defaulting to 0.
-m Controls the contrast of the resulting image. Valid range is
from 0.3 to 1.0. The default value of 0 uses an algorithm to
calculate an appropriate m factor for the image based on its
luminance.
-c Amount of chromatic adaptation to apply to the image. Valid
range is from 0 meaning no chromatic adaptation to 1 meaning
fully adapted. Defaults to 0.
-a Controls the light adaptation. Valid range is from 0 meaning
that the adaptation is global to 1 meaning that the adaptation
is based on pixel intensity. Defaults to 1, to trade detail
visibility for contrast.
AUTHORS
Billy Biggs <vektor@dumbterm.net>.
SEE ALSOexrtools(1).
exrtools 0.4 December 2003 exrpptm(1)
