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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 interpolated
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 de‐
fault values give optimal alias rejection, and should not normally be
tampered with.
Pdup scales an image by pixel duplication. Sx and sy are the horizon‐
tal 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 sxÃsy 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.
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