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 (default) 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)