PNMTOTIFF

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)

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).