pamdeinterlace



Pamdeinterlace User Manual(0)                    Pamdeinterlace User Manual(0)




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 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 pamscale to restore it to its nor-
       mal height:


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

       Another, usually better, way to deinterlace an image is with  pammixin-
       terlace.




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)



netpbm documentation           11 November 2001  Pamdeinterlace User Manual(0)

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