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  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 ALSO

       tifftopnm(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)