asciitopgm
convert ASCII graphics into a portable graymap
see also :
pbmtoascii
Synopsis
asciitopgm
[-d divisor] height width
[asciifile]
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examples
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description
Reads ASCII
data as input. Produces a portable graymap with pixel values
which are an approximation of the "brightness" of
the ASCII characters, 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 ,
pgm
author
Wilson H. Bent.
Jr. (whb[:at:]usc[:dot:]edu)