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  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 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)