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 Computer 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 ALSO

       exrtools(1).