plan9 man page for resample

RESAMPLE(9.1)															     RESAMPLE(9.1)

NAME
       resample, pdup - resample a picture

SYNOPSIS
       fb/resample width [ input ] [ B C ]

       fb/pdup sx sy [ input ]

DESCRIPTION
       Resample  resamples  the scan lines of its input image (default standard input) to the given new width.	The image is decimated or interpo-
       lated using a well-designed cubic filter.  See transpose(9.1) for assistance with vertical resampling.

       The reference explains the optional filter parameters B and C.  The default values give optimal alias rejection, and should not normally be
       tampered with.

       Pdup  scales  an image by pixel duplication.  Sx and sy are the horizontal and vertical scale factors.  They must be positive integers.	In
       the output image (written on standard output), each pixel of the input image (default standard input) generates an sxxsy block of identical
       pixels.

SOURCE
       /sys/src/fb/resample.c
       /sys/src/fb/pdup.c

SEE ALSO
       picfile(9.6), Don P. Mitchell and Arun Netravali, ``Reconstruction in Computer Graphics'', SIGGRAPH '88 Conference Proceedings.

																     RESAMPLE(9.1)