RESAMPLE(1) RESAMPLE(1)
NAME
resample, resize - resample a picture
SYNOPSIS
resample [ -x size ] [ -y size ] [ file ]
resize [ -b ] [ -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 options. An unadorned value sets the number of pix-
els 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.
Resize is similar, except it sacrifices image quality for
speed. The -b option uses a bilinear filter to improve
image quality.
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 image or change the pixel format, use iconv
(see crop(1)).
SOURCE
/sys/src/cmd/resample.c
SEE ALSO
crop(1), image(6)
BUGS
Resize is quick, but resample produces correct pictures.
Page 1 Plan 9 (printed 12/30/24)