1Pamslice User Manual(0) Pamslice User Manual(0)
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6 pamslice - extract one line of values out of a Netpbm image
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10 pamslice {-row=rownumber | -column=columnnumber} [-plane=planenumber]
11 [imagefile]
12
15 All options can be abbreviated to their shortest unique prefix. You
16 may use two hyphens instead of one. You may separate an option name
17 and its value with white space instead of an equals sign.
18
21 This program is part of Netpbm(1).
22 pamslice extracts one line of tuples (pixels) out of a Netpbm image and
24 prints their values in a table. A line means a row or column. It
25 shows you a one-dimensional cross section of a two-dimensional image.
26 (With the -plane option, it can be thought of as a one-dimensional
27 cross-section of a three-dimensional image).
28 The table has one line per tuple, consisting of blank-separated ASCII
30 decimal numbers. The first number is the column number if you speci‐
31 fied a row slice or the row number if you specified a column slice.
32 The rest of the numbers are the sample values in plane number order.
33 For a PBM or PGM input, there is only one plane. For a PPM input,
34 Plane 0 is red, Plane 1 is green, and Plane 2 is blue. See the speci‐
35 fications of the image formats for details on exactly what these num‐
36 bers mean.
37 If you want to see the entire raster of a Netpbm image, use pamtable.
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42 In addition to the options common to all programs based on libnetpbm
43 (most notably -quiet, see
44 Common Options ⟨index.html#commonoptions⟩ ), pamslice recognizes the
45 following command line options:
46 -row=rownumber
50 This indicates that the slice is to be horizontal -- i.e.
51 one row of the
52 image -- and indicates which row. Rows are numbered from
53 the top
54 starting with 0.
55 You cannot specify both -row and -column.
57 -column=colnumber
60 This indicates that the slice is to be vertical -- i.e. one
61 column of the
62 image -- and indicates which column. Columns are numbered
63 from the left
64 starting with 0.
65 You cannot specify both -row and -column.
67 -plane=planenumber
70 This specifies that you are interested in only one plane of
71 the image
72 and which one. Planes are numbered from 0 and have mean‐
73 ings that vary
74 on the type of image. In a PPM image, Plane 0 is red,
75 Plane 1 is
76 green, and Plane 2 is blue.
77 If you don't specify -plane, you get all the planes -- each
79 line of output has multiple numbers in addition to the se‐
80 quence number.
81 If you do specify -plane, each line of output contains one
82 number in addition to the sequence number.
83 -xmgr
86 This option causes pamslice to format the output as input
87 for a
88 xmgr so you can plot it. The only difference this option
89 makes
90 is that it adds header information to the beginning of the
91 output.
92
97 pamtable(1) pamcut(1) pamtopnm(1) pamchannel(1) pnm(1)
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101 pamslice replaced pgmslice in Netpbm 10.3 (June 2002). It was backward
102 compatible, but worked on Netpbm images other than PGM and PBM and
103 added the -plane and -xmgr options.
104
107 Jos Dingjan <jos@tuatha.org> wrote pgmslice after being unable to find
108 the source code to Marco Beijersbergen's program with the same name.
109 Bryan Henderson converted it to pamslice.
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112 This manual page was generated by the Netpbm tool 'makeman' from HTML
113 source. The master documentation is at
114 http://netpbm.sourceforge.net/doc/pamslice.html
116netpbm documentation 08 February 2010 Pamslice User Manual(0)