exrtools(1) [debian man page]

exrtools(1)						      General Commands Manual						       exrtools(1)

NAME

       exrtools - a collection of utilities for manipulating OpenEXR images

DESCRIPTION

       exrtools  is  a	set  of  simple  command-line  utilities  for dealing with high dynamic range images in OpenEXR format.  OpenEXR is a high
       dynamic-range (HDR) image file format developed by Industrial Light & Magic for use in computer imaging applications.

       exrtools was developed to help experiment with batch processing of HDR images for tone mapping, and it is released in the hopes that  some-
       one  may  find them useful.  Each application is small and reasonably self-contained such that the source code may be of most value to oth-
       ers.

       The biggest assumption in most of this code is that the EXR files and PNG files all use sRGB primaries and gamma function.  Fixing this	is
       not  very  difficult, and the code to fix allows for some interesting possibilities.  That said, I do not have time right now, so this will
       have to wait.

AUTHORS

       Billy Biggs <vektor@dumbterm.net>.

SEE ALSO

       exrblur(1), exrchr(1), exricamtm(1), exrnlm(1), exrnormalize(1), exrpptm(1),  exrstats(1),  exrtopng(1),  jpegtoexr(1),	pngtoexr(1),  ppm-
       toexr(1).

exrtools 0.4							   December 2003						       exrtools(1)

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)