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Pamchannel User Manual(0)                            Pamchannel User Manual(0)

       pamchannel - extract channels from a PAM image

       pamchannel [-infile infile] [-tupletype tupletype] [channum ...]

       Minimum  unique  abbreviation  of option is acceptable.  You may use double hyphens instead of single hyphen to
       denote options.  You may use white space in place of the equals sign to separate an option name from its value.

       This program is part of Netpbm(1).

       pamchannel  reads  a  PAM or PNM image as input and produces a PAM image as output, consisting of the indicated
       channels (planes) of the input.

       The output is the same dimensions as the input, except that the depth is the number of  channum  arguments  you
       supply.  The tuple type is a null string unless you specify the -tupletype option.

       This  program  works  on multi-image streams, producing a corresponding output stream.  But before Netpbm 10.32
       (February 2006), it ignored every image after the first.

       pamstack does the opposite of pamchannel:  It takes multiple PAM or PNM images as input and stacks their planes
       (channels) on top of one another to yield a single PAM.

       -infile infile
              This  specifies  the input file, which defaults to Standard Input.  You may specify - to select Standard
              Input explicitly.

              This is a little unconventional for Netpbm programs, which usually have the input file specification  as
              an argument.  For pamchannel, the arguments are channel numbers.

       -tupletype tupletype
              This specified the tuple type name to be recorded in the output.  You may use any string up to 255 char-
              acters.  Some programs recognize some names.  If you omit this option, the default tuple  type  name  is

       pam(1) pamstack(1)

       pamchannel was new, along with the PAM format, in Netpbm 9.7 (August 2000).

netpbm documentation            10 January 2006      Pamchannel User Manual(0)