xenial (1) pamdeinterlace.1.gz

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)