DragonFly On-Line Manual Pages

pfssize(1)             DragonFly 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)