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

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

56       pam(1) pamstack(1)
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HISTORY

60       pamchannel  was  new,  along with the PAM format, in Netpbm 9.7 (August
61       2000).
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65netpbm documentation            10 January 2006      Pamchannel User Manual(0)