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pamdeinterlace(1)					     pamdeinterlace(1)

NAME
       pamdeinterlace - remove ever other row from a PAM/PNM image

SYNOPSIS
       pamdeinterlace [-takeodd] [-takeeven] N [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
       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 mov‐
       ing, 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 pnmscale to restore it to its nor‐
       mal height:

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

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
       pamstretch(1), pnmscale(1)

			       11 November 2001		     pamdeinterlace(1)
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