asciitopgm - convert ASCII graphics into a portable graymap
-d divisor] height width
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
characters are automatically padded with spaces.
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
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
that there is no asciitopbm tool - this transformation is one-way."
The table of ASCII-to-grey values is subject to interpretation, and, of course,
depends on the typeface intended for the input.
Wilson H. Bent. Jr. (email@example.com)