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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
	      calculate	an appropriate m factor	for the	image based on its lu-
	      minance.

       -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)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | AUTHORS | SEE ALSO

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