1Pamchannel User Manual(0)                            Pamchannel User Manual(0)
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NAME

6       pamchannel - extract channels from a PAM image
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SYNOPSIS

10       pamchannel [-infile=infile] [-tupletype=tupletype] [channum ...]
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12       Minimum  unique abbreviation of option is acceptable.  You may use dou‐
13       ble hyphens instead of single hyphen to denote options.   You  may  use
14       white space in place of the equals sign to separate an option name from
15       its value.
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DESCRIPTION

19       This program is part of Netpbm(1).
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21       pamchannel reads a Netpbm image as input and produces a  PAM  image  as
22       output, consisting of the indicated channels (planes) of the input.
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24       Each channum argument is the number of a channel of the input, with the
25       first channel being zero.  The channels in the output are in the  order
26       of these arguments.
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28       The  output  is the same dimensions as the input, except that the depth
29       is the number of channum arguments you supply.  The  tuple  type  is  a
30       null string unless you specify the -tupletype option.
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32       This  program  works  on multi-image streams, producing a corresponding
33       output stream.  But before Netpbm 10.32  (February  2006),  it  ignored
34       every image after the first.
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36       pamstack does the opposite of pamchannel:  It takes multiple PAM or PNM
37       images as input and stacks  their  planes  (channels)  on  top  of  one
38       another to yield a single PAM.
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OPTIONS

42       -infile infile
43              This specifies the input file, which defaults to Standard Input.
44              You may specify - to select Standard Input explicitly.
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46              This is a little unconventional for Netpbm programs, which  usu‐
47              ally have the input file specification as an argument.  For pam‐
48              channel, the arguments are channel numbers.
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51       -tupletype tupletype
52              This specified the tuple type name to be recorded in the output.
53              You may use any string up to 255 characters.  Some programs rec‐
54              ognize some names.  If you omit this option, the  default  tuple
55              type name is null.
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SEE ALSO

60       pam(1) pamstack(1)
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HISTORY

64       pamchannel  was  new,  along with the PAM format, in Netpbm 9.7 (August
65       2000).
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DOCUMENT SOURCE

68       This manual page was generated by the Netpbm tool 'makeman'  from  HTML
69       source.  The master documentation is at
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71              http://netpbm.sourceforge.net/doc/pamchannel.html
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73netpbm documentation            10 January 2006      Pamchannel User Manual(0)