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).

exrtools 0.4                                      December 2003                                       exrpptm(1)