exrpptm(1) General Commands Manual exrpptm(1)
NAME
exrpptm - performs tone mapping on an OpenEXR image (photoreceptor)
SYNOPSIS
exrpptm [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 calcu-
late 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 ALSO
exrtools(1).
exrtools 0.4 December 2003 exrpptm(1)
