Manual: pamdeinterlace

Pamdeinterlace User Manual(1)			   General Commands Manual		       Pamdeinterlace 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 sepa‐
       rate 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 before 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 normal height:

       pamdeinterlace myimage.ppm | pamstretch -yscale=2 >newimage.ppm

       Another, usually better, way to deinterlace an image is with pammixinterlace.

OPTIONS
       In  addition  to	 the  options common to all programs based on libnetpbm (most notably -quiet, see  Common Options ),
       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  spec‐
	      ify 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)