attempt to convert an unknown type of image file to a portable anymap
SYNOPSIS
anytopnmfile
DESCRIPTION
Uses the
file
program, possibly augmented by the magic numbers file
included with PBMPLUS, to try to figure out what type of image file it is.
"magic numbers"
If that fails (very few image formats have magic numbers),
looks at the filename extension.
If that fails, punts.
The type of the output file depends on the input file.