Man Pages

pamdeinterlace(1) - phpMan pamdeinterlace(1) - phpMan

Command: man perldoc info search(apropos)  


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  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 pam-
       scale 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
       -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 can-
              not specify both -takeeven and -takeodd.




SEE ALSO
       pammixinterlace(1), pam(1) pnm(1)



netpbm documentation           11 November 2001  Pamdeinterlace User Manual(0)