term% cat index.txt RESAMPLE(1) General Commands Manual RESAMPLE(1)
NAME
resample - resample a picture
SYNOPSIS
resample [ -x size ] [ -y size ] [ file ]
DESCRIPTION
Resample resamples its input image (default standard input) to a new
size. The image is decimated or interpolated using a Kaiser window.
The size of the resampled image can be specified with the -x and -y op‐
tions. An unadorned value sets the number of pixels of that dimension;
a suffixed percent sign specifies a percentage. If only one of -x or
-y is given, the other dimension is scaled to preserve the aspect ratio
of the original image. Thus, -x50% will reduce the image to half its
original dimension in both x and y.
The input should be a Plan 9 image as described in image(6), and the
output will be a compressed 24-bit r8g8b8 image. To uncompress the im‐
age or change the pixel format, use iconv (see crop(1)).
SOURCE
/sys/src/cmd/resample.c
SEE ALSO
crop(1), image(6)
BUGS
Faster algorithms exist, but this implementation produces correct pic‐
tures.
RESAMPLE(1)