pfssize(1) [debian man page]

pfssize(1)						      General Commands Manual							pfssize(1)

NAME

       pfssize - Resize frames

SYNOPSIS

       pfssize [--x <new_width>] [--y <new_height>] [--ratio <scale_ratio>] [--maxx <max_width>] [--maxy <max_heigh>] [--minx <max_width>] [--miny
       <max_heigh>] [--filter <filter-name>]

DESCRIPTION

       Resize all frames and all channels in the stream. Note that resampling is done on each channel as it is - for color  images  resampling	is
       usually done in linear (not gamma corrected) XYZ color space.

OPTIONS

       --x <new_width>, -x <new_width>

	      New x resolution in pixels.

       --y <new_height>, -y <new_height>

	      New y resolution in pixels.

       --ratio <scale_ratio>, -r <scale_ratio>

	      Resize  both  width  and height using the given ratio. Ratio equal 1 is the original size, lower than 1 makes the frames smaller and
	      greater than 1, enlarges the frames.

       --minx <max_width>, --miny <max_heigh>

	      Make sure that the resulting image has at least <min_width> width and/or <min_height> height. Cannot be used in combination with -x,
	      -y and --ratio.

       --maxx <max_width>, --maxy <max_heigh>

	      Make  sure that the resulting image has at most <max_width> width and/or <max_height> height. Cannot be used in combination with -x,
	      -y and --ratio.

       --filter <filter-name>, -f <filter-name>

	      Use filter <filter-name> for upsampling (on downsampling, box filter is always used). Available filters:

	      BOX Box filter. This is the fastest and the filter, but it also causes visible aliasing artifacts.

	      LINEAR (deafult) Bi-linear filter.

	      MITCHELL Mitchell filter. From Mitchell and Netravali, Reconstruction Filters in Computer Graphics,In Computer Graphics, vol. 22 (4)
	      1988. Since the filter contains negative parts, it may cause halo artifacts and it may result in negative values for HDR images.

EXAMPLES

       pfsin memorial.hdr | pfssize -r 0.25 | pfsout memorial_small.hdr

	      Lower the resolution of memorial.hdr four times.

SEE ALSO

       pfsin(1) pfsout(1)

BUGS

       Please report bugs and comments to Rafal Mantiuk <mantiuk@mpi-sb.mpg.de>.

																	pfssize(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)