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)