NAME

       pfsoutexr - Write images or frames in OpenEXR format

SYNOPSIS

       pfsoutexr   [--compression   <method>]  [--float32]  [--clamp-halfmax]  (<file>  [--frames
       <range>])  [<file>...]

DESCRIPTION

       Use this command to write frames in OpenEXR format. Source pfs frames should be  piped  to
       the  Standard  Input.  This  command  can  write  arbitrary  channels to OpenEXR as 32-bit
       floating point numbers. However, color channels are converted to 16-bit half-float  format
       by default unless --float32 option is specified.

       All tags from pfs stream are stored in an OpenEXR file as String attributes. Tags assigned
       to channels are stored in the format <channel_name>:<tag_name>, so that pfsinexr can later
       restore tags in the appropriate channels.

       The  depth  channel  DEPTH  is  renamed  to  Z to keep compatibility with pfsinexr. If the
       luminance is absolute (tag LUMINANCE set to ABSOLUTE), WhiteLuminance attribute in OpenEXR
       file is set to 1.

       Details  on  the  format  of  the  pattern  file names, which are used for saving multiple
       frames, can be found in the manual page of pfsoutppm.

       --compression <method>, -c <method>
              Use one the the available compression methods:

              NO - no compression

              RLE - run length encoding

              ZIPS - zlib compression, one scan line at a time

              ZIP - zlib compression, in blocks of 16 scan lines

              PIZ - piz-based wavelet compression (default)

              PXR24 - lossy 24-bit float compression

       --float32, -3
              If this option is specified, color channels are stored  as  32-bit  floating  point
              numbers  instead  of  16-bit  half-floats.  In  most cases half-float numbers offer
              sufficient precision so this the default behavior. Note that storing color channels
              in 32-bit format makes resulting files very large.

       --clamp-halfmax, -p
              The  maximum value that can be stored in OpenEXR file is limited to 65504 if 16-bit
              HALF float is used (color channels are stored by  default  in  this  format  unless
              --float32  switch  is  specified).  If the luminance data is calibrated in absolute
              values (cd/m^2), pixel values can easily exceed  65504.  To  avoid  clamping  large
              pixel  values,  pfsoutexr  rescales data to the range that is valid for 16-bit HALF
              float format and the scale factor used for rescaling is stored in OpenEXR  file  as
              OpenEXR  standard  attribute WhiteLuminance, so that pfsinexr can later restore the
              absolute values. Use the option --clamp-halfmax to disable this behavior and  clamp
              half-float values instead.

EXAMPLES

        pfsin memorial.hdr | pfsoutexr memorial.exr

              Converts from one HDR format to another

SEE ALSO

       pfsout(1) pfsoutppm(1) pfsinexr(1)

BUGS

       pfsinexr and pfsoutexr can not take stdin / stdout as an input/output (dash '-' instead of
       file name).

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

                                                                                     pfsoutexr(1)