1Pgmnoise User Manual(0)                                Pgmnoise User Manual(0)
2
3
4

NAME

6       pgmnoise - create a PGM image made up of white noise
7
8

SYNOPSIS

10       pgmnoise width height
11
12       [-maxval=n] [-randomseed=integer]
13
14       Minimum  unique  abbreviations  of  option are acceptable.  You may use
15       double hyphens instead of single hyphen to denote options.  You may use
16       white space in place of the equals sign to separate an option name from
17       its value.
18
19
20

DESCRIPTION

22       This program is part of Netpbm(1).
23
24       pgmnoise creates a PGM image that  is  made  up  of  pixels  of  random
25       brightness.
26
27       You specify the dimensions of the image with the width and height argu‐
28       ments.
29
30       The randomness in the image is limited before  Netpbm  10.37  (December
31       2006)  --  if you run the program twice in the same second, you may get
32       identical output.
33
34
35

OPTIONS

37       In addition to the options common to all programs  based  on  libnetpbm
38       (most notably -quiet, see
39        Common  Options  ⟨index.html#commonoptions⟩ ), pgmnoise recognizes the
40       following command line options:
41
42
43
44       -maxval=n
45              The maxval of the generated image.
46
47              Default is 255.
48
49              This option was new in Netpbm 10.63 (June 2013).
50
51
52       -randomseed=integer
53              This is the seed for the random number generator that  generates
54              the pixels.
55
56              Use  this  to  ensure you get the same image on separate invoca‐
57              tions.
58
59              By default, pgmnoise uses a seed derived from the  time  of  day
60              and  process  ID, which gives you fairly uncorrelated results in
61              multiple invocations.
62
63              This option was new in Netpbm 10.45 (December 2008).
64
65
66
67

SEE ALSO

69       •
70
71              pbmnoise(1)
72
73       •
74
75              pgm(1)
76
77
78

AUTHOR

80       Copyright (C) 1993 by Frank Neumann
81

DOCUMENT SOURCE

83       This manual page was generated by the Netpbm tool 'makeman'  from  HTML
84       source.  The master documentation is at
85
86              http://netpbm.sourceforge.net/doc/pgmnoise.html
87
88netpbm documentation             27 June 2013          Pgmnoise User Manual(0)
Impressum