NAME

       pamslice - extract one line of values out of a Netpbm image

SYNOPSIS

       pamslice {-row=rownumber | -column=columnnumber} [-plane=planenumber] [imagefile]

OPTION USAGE

       All  options can be abbreviated to their shortest unique prefix.  You may use two hyphens instead of one.
       You may separate an option name and its value with white space instead of an equals sign.

DESCRIPTION

       This program is part of Netpbm(1).

       pamslice extracts one line of tuples (pixels) out of a Netpbm image and prints their values in  a  table.
       A  line  means a row or column.  It shows you a one-dimensional cross section of a two-dimensional image.
       (With the -plane option, it can be thought of as a one-dimensional cross-section of  a  three-dimensional
       image).

       The  table has one line per tuple, consisting of blank-separated ASCII decimal numbers.  The first number
       is the column number if you specified a row slice or the row number if you specified a column slice.  The
       rest of the numbers are the sample values in plane number order.  For a PBM or PGM input, there  is  only
       one  plane.   For  a  PPM  input,  Plane  0  is  red,  Plane  1  is  green, and Plane 2 is blue.  See the
       specifications of the image formats for details on exactly what these numbers mean.

       If you want to see the entire raster of a Netpbm image, use pamtable.

OPTIONS

       In addition to the options common to all programs based on libnetpbm (most notably  -quiet,  see   Common
       Options ), pamslice recognizes the following command line options:

       -row=rownumber
                   This indicates that the slice is to be horizontal -- i.e. one row of the
                   image -- and indicates which row.  Rows are numbered from the top
                   starting with 0.

              You cannot specify both -row and -column.

       -column=colnumber
                   This indicates that the slice is to be vertical -- i.e. one column of the
                   image -- and indicates which column.  Columns are numbered from the left
                   starting with 0.

              You cannot specify both -row and -column.

       -plane=planenumber
                   This specifies that you are interested in only one plane of the image
                   and which one.  Planes are numbered from 0 and have meanings that vary
                   on the type of image.  In a PPM image, Plane 0 is red, Plane 1 is
                   green, and Plane 2 is blue.

              If you don't specify -plane, you get all the planes -- each
                   line of output has multiple numbers in addition to the sequence number.
                   If you do specify -plane, each line of output contains one
                   number in addition to the sequence number.

       -xmgr
                   This option causes pamslice to format the output as input for a
                   xmgr so you can plot it.  The only difference this option makes
                   is that it adds header information to the beginning of the output.

SEE ALSO

       pamtable(1) pamcut(1) pamtopnm(1) pamchannel(1) pnm(1)

HISTORY

       pamslice  replaced pgmslice in Netpbm 10.3 (June 2002).  It was backward compatible, but worked on Netpbm
       images other than PGM and PBM and added the -plane and -xmgr options.

AUTHOR

       Jos Dingjan <jos@tuatha.org> wrote pgmslice  after  being  unable  to  find  the  source  code  to  Marco
       Beijersbergen's program with the same name.  Bryan Henderson converted it to pamslice.

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/pamslice.html

netpbm documentation                            08 February 2010                         Pamslice User Manual(1)