This is the command pfsoutexr that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
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
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