anytopnm - convert an arbitrary type of image file to PBM, PGM, or PPM
This program is part of Netpbm(1)
converts the input image, which may be in any of about 100
graphics formats, to PBM, PGM, or PPM format, depending on that nature of the
input image, and outputs it to Standard Output.
To determine the format of the input, anytopnm
uses the file
program (possibly assisted by the magic numbers file fragment included with
Netpbm). If that fails (very few image formats have magic numbers),
looks at the filename extension. If that fails,
The type of the output file depends on the input image.
uses the converters for particular graphics formats that are in
the Netpbm package, so it can't convert any format that you couldn't convert
with some other Netpbm program. What anytopnm
adds is the ability to
recognize the format and choose the appropriate Netpbm program to convert it.
For example, if you invoke anytopnm
on a GIF file, anytopnm
recognize that it is a GIF file and therefore giftopnm
knows how to
convert it to PNM, so anytopnm
cannot recognize every possible input format, so you may still
be able to convert an image with a specific Netpbm program when
fails to convert it.
indicates that the input file is compressed (either via Unix
compress, gzip, or bzip compression), anytopnm
uncompresses it and
proceeds as above with the uncompressed result.
indicates that the input file is encoded by uuencode or btoa,
decodes it and proceeds as above with the decoded result.
or not given, anytopnm
takes its input from
Copyright (C) 1991 by Jef Poskanzer.