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
       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 pnmscale to restore it to its normal 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)

AUTHOR

       put by Bryan Henderson in the public domain in 2001

                                                11 November 2001                               pamdeinterlace(1)