pgmnoise(1) General Commands Manual pgmnoise(1)NAME
pgmnoise - create a graymap made up of white noise
SYNOPSIS
pgmnoise width height
DESCRIPTION
Creates a portable graymap that is made up of random pixels with gray values in the range of 0 to PGM_MAXMAXVAL (depends on the compila-
tion, either 255 or 65535). The graymap has a size of width * height pixels.
SEE ALSO pgm(5)AUTHOR
Copyright (C) 1993 by Frank Neumann
16 November 1993 pgmnoise(1)
Check Out this Related Man Page
asciitopgm(1) General Commands Manual asciitopgm(1)NAME
asciitopgm - convert ASCII graphics into a portable graymap
SYNOPSIS
asciitopgm [-d divisor] height width [asciifile]
DESCRIPTION
Reads ASCII data as input. Produces a portable graymap with pixel values which are an approximation of the "brightness" of the ASCII char-
acters, assuming black-on-white printing. In other words, a capital M is very dark, a period is ver light, and a space is white. Input
lines which are fewer than width characters are automatically padded with spaces.
The divisor argument is a floating-point number by which the output pixels are divided; the default value is 1.0. This can be used to
adjust the brightness of the graymap: for example, if the image is too dim, reduce the divisor.
In keeping with (I believe) Fortran line-printer conventions, input lines beginning with a + (plus) character are assumed to "overstrike"
the previous line, allowing a larger range of gray values.
This tool contradicts the message in the pbmtoascii manual: "Note that there is no asciitopbm tool - this transformation is one-way."
BUGS
The table of ASCII-to-grey values is subject to interpretation, and, of course, depends on the typeface intended for the input.
SEE ALSO pbmtoascii(1), pgm(5)AUTHOR
Wilson H. Bent. Jr. (whb@usc.edu)
26 December 1994 asciitopgm(1)
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