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)
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pfscut(1) General Commands Manual pfscut(1) NAME
pfscut - Extract a rectangle out of a frame in PFS stream SYNOPSIS
pfscut [--left <columns>] [--right <columns>] [--top <rows>] [--bottom <rows>] [--width <new_width>] [--height <new_height>] [--help] [x_ul y_ul x_br y_br] DESCRIPTION
Extract a rectangle out of each frame in PFS stream. You can either specify x and y coordinates of upper left and lower right corner (the coordinates start with 0 and rise in the left-to-right and up-to-botton directions) or give a combination of the options listed below. OPTIONS
--left <columns>, -l <columns> Number of columns to be cut out from the left edge of an image. --right <columns>, -r <columns> Number of columns to be cut out from the right edge of an image. --top <rows>, -t <rows> Number of rows to be cut out from the top edge of an image. --bottom <rows>, -b <rows> Number of rows to be cut out from the bottom edge of an image. --width <new_width>, -W <new_width> Width of an output image. Note that --width can be mixed with either --left or --right option. --height <new_height>, -H <new_height> Height of an output image. Note that --height can be mixed with either --top or --bottom option. --help, -h Print a list of commandline options. EXAMPLES
pfsin image.hdr | pfscut --left 20 --top 5 | pfsout out.hdr Cut out 20 columns from the left and 5 rows from the top edge of image.hdr and save frame as out.hdr. pfsin image.hdr | pfscut --left 20 --width 400 | pfsout out.hdr Cut out 20 columns from the left edge of image.hdr, and create output image 400 pixels in width. pfsin image.hdr | pfscut 0 0 511 511 | pfsout out.hdr Cut left-upper part of the image of the size 512x512 (note that coordinates start with 0 and 512 is the last row/column that is included in the resulting image). SEE ALSO pfsin(1) pfsout(1) BUGS
Please report bugs and comments to Dorota Zdrojewska <dzdrojewska@wi.ps.pl>. pfscut(1)