pfsoutexr(1) [suse man page]

pfsoutexr(1)						      General Commands Manual						      pfsoutexr(1)

NAME

       pfsoutexr - Write images or frames in OpenEXR format

SYNOPSIS

       pfsoutexr [--compression <method>] [--keep-xyz] (<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 arbi-
       trary channels to OpenEXR, color channels XYZ however are specially handled (see option keep-xyz).

       All tags from pfs stream are stored in an OpenEXR file as String attributes. Tags assigned to channels are  stored  in  the  format  <chan-
       nel_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

       --keep-xyz
	      By default, color channels XYZ from pfs stream are converted to RGB color space and HALF format, which  is  a  standard  format  for
	      color  data in OpenEXR. Since Half format is 16-bit and floating points values used in pfs stream are 32-bit, this conversion causes
	      loss of precision. When keep-xyz option is specified, color channels XYZ are stored as they are without any conversion (32-bit float
	      XYZ channels). Note however, that most OpenEXR applications can recognize only RGB Half format images and can not handle 32-bit XYZ.

       --fix-halfmax
	      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 --keep-xyz 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 can rescale data to the range that is valid
	      for 16-bit HALF float format when --fix-halfmax switch is specified. If this switch is missing,  a  warning  message  is	displayed.
	      Scale  factor  used for rescaling is stored in OpenEXR file as OpenEXR standard attribute WhiteLuminance, so that pfsinexr can later
	      restore the absolute values.

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)

pfsin(1)						      General Commands Manual							  pfsin(1)

NAME

       pfsin - Read an image in one of the several formats and write pfs stream to the standard output

SYNOPSIS

       pfsin <file> [<file>...]

DESCRIPTION

       This  command can be used to read high- or low- dynamic range image in several recognized formats and output pfs stream on standard output.
       The pfs stream is usually piped to another program for further processing (see examples). To get a list of recognized  formats  and  exten-
       sions, execute:

	 pfsin --help

       This command is a front-end for pfsin* programs for reading images: pfsinrgbe, pfsinexr, etc. Based on the file extension, appropriate pro-
       gram is executed. If two different file format are given as parameters, two different program for loading images are  executed.	Additional
       options	starting  with	dash  '-'  can	be passed to pfsin* programs. The following rules apply for passing the options: the options given
       before any image file name (or %d pattern) are passed to all pfsin* programs. Options given after image file name are only  passed  to  the
       program executed for that file(s). Note also that all option that take an argument (except --frames) must given in the form --option=value,
       that is without a space between an option and its argument.

OPTIONS

       The following options are shared by most pfsin* commands, although some may not accept --absolute and may ignore --linear.

       --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 frames 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, -l
	      Converts	pixel  values  to  linear  luminance  (XYZ),  assuming	the  sRGB color space for the input image. The maximum pixel value
	      (255,255,255) is mapped to Y=1. LUMINANCE tag is set to RELATIVE.

       --absolute <max_lum>, -a <max_lum>
	      --absolute converts pixel values to an absolute linear luminance (XYZ), that is the color space, in which channel Y  contains  lumi-
	      nance  given  in	cd/m^2.  The  sRGB  color space is assumed for the input image. The maximum pixel value (255,255,255) is mapped to
	      Y=<max_lum>. <max_lum> is typically set to 80 [cd/m^2] for a CRT monitor. LUMINANCE tag  is  set	to  ABSOLUTE.  --absolute  process
	      images almost the same as --relative, but additionally it scales all pixels by <max_lum>.

EXAMPLES

       pfsin memorial.pic | pfsview

	      See a hdr image in Radiance format (RGBE).

       pfsin memorial.pic | pfstmo_drago03 | pfsout memorial.jpeg

	      Tone map a hdr image and save it as JPEG.

SEE ALSO

       pfsout(1) pfsinppm(1)

BUGS

       For  LDR  formats  -  JPEG,  PNG, PNM: If pfstools are compiled without ImageMagic support, this command currently will not handle multiple
       frames given with a %d pattern.

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

																	  pfsin(1)