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Pamslice User Manual(0)                                Pamslice User Manual(0)



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 all the pixels in a PPM, PGM, or PBM image in ASCII decimal, pnmtoplainpnm is a good way  to
       do that.


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
       pamcut(1) pnmtoplainpnm(1) pnmtoplainpnm(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 <josATtuatha.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.



netpbm documentation             22 June 2002          Pamslice User Manual(0)