pnmtotiff(1)pnmtotiff(1)NAMEpnmtotiff - convert a a portable anymap into a TIFF file
SYNOPSISpnmtotiff [-none|-packbits| -lzw|-g3|-g4] [-2d] [-fill] [-predictor n]
[-msb2lsb|-lsb2msb] [-rowsperstrip n] [pnmfile]
DESCRIPTION
Reads a portable anymap as input. Produces a TIFF file as output.
OPTIONS
By default, pnmtotiff creates a TIFF file with LZW compression. This
is your best bet most of the time. However, some TIFF readers can't
deal with it. If you want to try another compression scheme or tweak
some of the other even more obscure output options, there are a number
of flags to play with.
The -none, -packbits, -lzw, -g3, and -g4 options are used to override
the default and set the compression scheme used in creating the output
file. The CCITT Group 3 and Group 4 compression algorithms can only be
used with bilevel data. The -2d and -fill options are meaningful only
with Group 3 compression: -2d requests 2-dimensional encoding, while
-fill requests that each encoded scanline be zero-filled to a byte
boundry. The -predictor option is only meaningful with LZW compres‐
sion: a predictor value of 2 causes each scanline of the output image
to undergo horizontal differencing before it is encoded; a value of 1
forces each scanline to be encoded without differencing.
By default, pnmtotiff creates a TIFF file with msb-to-lsb fill order.
The -msb2lsb and -lsb2msb options are used to override the default and
set the fill order used in creating the file.
The -rowsperstrip option can be used to set the number of rows (scan‐
lines) in each strip of data in the output file. By default, the out‐
put file has the number of rows per strip set to a value that will
ensure each strip is no more than 8 kilobytes long.
BUGS
This program is not self-contained. To use it you must fetch the TIFF
Software package listed in the OTHER.SYSTEMS file and configure PBMPLUS
to use libtiff. See PBMPLUS's Makefile for details on this configura‐
tion.
SEE ALSOtifftopnm(1), pnm(5)AUTHOR
Derived by Jef Poskanzer from ras2tiff.c, which is Copyright (c) 1990
by Sun Microsystems, Inc. Author: Patrick J. Naughton
(naughton@wind.sun.com).
13 January 1991 pnmtotiff(1)
