NAME

       pfsinrgbe - Load images or frames in Radiance RGBE format

SYNOPSIS

       pfsinrgbe [--linear] (<file> [--frames <range>] [--skip-missing])  [<file>...]

DESCRIPTION

       pfsinrgbe  command loads images in Radiance RGBE format and writes pfs stream to the Standard Output. The
       pfs stream is usually piped to another program for further processing. To detect the format automatically
       based on the extension, use pfsin command.

       Since RGBE is an HDR format, 'LUMINANCE' tag is set to 'RELATIVE' (relative linear luminance values).

       To  read  images from standard input use a single dash '-' instead of filename. The images are read until
       EOF is reached.

       Each file can contain a %d pattern, which is substituted with frame numbers. The  pattern  has  the  same
       syntax  as  C  printf  command.  For  example,  you can use %04d to make the frame number four digit with
       proceedings zeros. You can select the frames using the following options  (the  options  must  be  always
       given after the file name):

       --frames <range>
              Range is given in mathlab / octave format:

              startframe:step:endframe

              Frame  numbers  start  with  startframe (default 0), are increased by step (default 1) and stop at
              endframe You can skip one of those values, for example 1:100 for frames 1,2,...,100 and  0:2:  for
              frame 0,2,4,... up to the last file that exists.

       --skip-missing
              Skip  up  to  ten  frames in a row if corresponding files are missing. Otherwise the program stops
              reading sequence at the first file that does not exists. This switch does not apply to  the  first
              frame  in a sequence. This switch can be useful if there is a rendered animation where some of the
              frame has not been generated.

       --linear
              Ignored for compatibility with pfsinppm.

       --radiance, -r
              Correct stored values so that the luminance is reported the same in  pfsview  and  radiance  tools
              (xview or Photospheare). See IMPORTANT NOTE below.

       --quiet, -q
              Disable  warning message about the change in handling absolute values in RGBE files. See IMPORTANT
              NOTE below.

EXAMPLES

       pfsinrgbe intro%d.hdr frame%d.hdr | ...

              Concatenate two animations into one and pass it to pipe for further processing.

IMPORTANT NOTE

       There is an incompatibility between viewers of RGBE format in terms of  absolute  luminance  values.  The
       ximage  viewer  from  Radiance package expects radiance values in RGBE files and multiplies the resulting
       luminance by the WHITE_EFFICACY constant equal to 179.0f to convert from radiance to luminance.

       To remain compatible with Radiance (xview and Photospheare), pfstools prior to 1.9.0 divided  red,  green
       and  blue  values  by  179 on writing and multiplied by that constant on reading RGBE files. This in turn
       caused incompatibility with other software, such as Photoshop or  HDR  toolbox.  Starting  from  pfstools
       1.9.0  this  division  / multiplication step was removed to make pfstools compatible in terms of absolute
       values with the majority of the software. The downside is that this change made luminance units) with the
       pfstools  1.9.0  or later. To avoid any mistakes because of that change, a long warning messages is shown
       each time pfsinrgbe or pfsoutrgbe is called. The message can be suppressed with --quiet option.

       To enable the old functionality and read or write RGBE files with the correction for WHITE_EFFICACY,  add
       --radiance option to the command line.

BUGS

       Please     report     bugs    and    comments    on    implementation    to    the    discussion    group
       http://groups.google.com/group/pfstools

SEE ALSO

       pfsin(1), pfsout(1)

                                                                                                    pfsinrgbe(1)