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pnmtotiff(1) AMIGA (13 January 1991) pnmtotiff(1)
NAME
pnmtotiff - convert a a portable anymap into a TIFF file
SYNOPSIS
pnmtotiff [-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 compression: 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 (scanlines) in each strip of data in the output file.
By default, the output 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 configuration.
SEE ALSO
tifftopnm(1), pnm(5)
Page 1 (printed 3/1/94)
pnmtotiff(1) AMIGA (13 January 1991) pnmtotiff(1)
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).
Page 2 (printed 3/1/94)