Pamdeinterlace User Manual(1General Commands ManuPamdeinterlace User Manual(1)
NAME
pamdeinterlace - remove every other row from a PAM/PNM image
SYNOPSIS
pamdeinterlace
[-takeodd]
[-takeeven]
[infile]
You can use the minimum unique abbreviation of the options. You can
use two hyphens instead of one. You can separate an option name from
its value with white space instead of an equals sign.
DESCRIPTION
This program is part of Netpbm(1).
pamdeinterlace removes all the even-numbered or odd-numbered rows from
the input PNM or PAM image. Specify which with the -takeeven and
-takeodd options.
This can be useful if the image is a video capture from an interlaced
video source. In that case, each row shows the subject 1/60 second be-
fore or after the two rows that surround it. If the subject is moving,
this can detract from the quality of the image.
Because the resulting image is half the height of the input image, you
will then want to use pamstretch or pamscale to restore it to its nor-
mal height:
pamdeinterlace myimage.ppm | pamstretch -yscale=2 >newimage.ppm
Another, usually better, way to deinterlace an image is with pammixin-
terlace.
OPTIONS
In addition to the options common to all programs based on libnetpbm
(most notably -quiet, see
Common Options ⟨index.html#commonoptions⟩ ), pamdeinterlace recognizes
the following command line options:
-takeodd
Take the odd-numbered rows from the input and put them in the
output. The rows are numbered starting at zero, so the first
row in the output is the second row from the input. You cannot
specify both -takeeven and -takeodd.
-takeeven
Take the even-numbered rows from the input and put them in the
output. The rows are numbered starting at zero, so the first
row in the output is the first row from the input. This is the
default. You cannot specify both -takeeven and -takeodd.
SEE ALSO
pammixinterlace(1), pam(1) pnm(1)
DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML
source. The master documentation is at
http://netpbm.sourceforge.net/doc/pamdeinterlace.html
netpbm documentation 11 November 2001 Pamdeinterlace User Manual(1)
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