Your message dated Tue, 22 Aug 2023 12:51:56 +0200
with message-id <[email protected]>
and subject line Re: Bug#423038: netpbm: doc says -lzw does not work, but it 
does
has caused the Debian Bug report #423038,
regarding netpbm: doc says -lzw does not work, but it does
to be marked as done.

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-- 
423038: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=423038
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: netpbm
Version: 2:10.0-11
Severity: minor
File: /usr/bin/pnmtotiff

The man page says:

  -lzw doesn't really
       work because the Tiff library doesn't do LZW compression.  It used  to,
       but  its developers removed the function out of concern about violating
       Unisys's patent.  This option remains in case you use  a  Tiff  library
       that  cooperates,  now or in the future.

However, using -lzw does work.  Thios should certainly be the default,
as stated in the same page:

       Actually,  the  best  default would be to use LZW compression, which is
       what pnmtotiff used to do by default.  However,  the  Tiff  library  no
       longer  does  LZW  compression  due to concerns with violating Unisys's
       patent on LZW compression.

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'testing-proposed-updates')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.18-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=it_IT@euro (charmap=ANSI_X3.4-1968) (ignored: LC_ALL 
set to C)
Shell: /bin/sh linked to /bin/bash

Versions of packages netpbm depends on:
ii  libc6                     2.3.6.ds1-13   GNU C Library: Shared libraries
ii  libjpeg62                 6b-13          The Independent JPEG Group's JPEG 
ii  libnetpbm10               2:10.0-11      Shared libraries for netpbm
ii  libpng12-0                1.2.15~beta5-1 PNG library - runtime
ii  libtiff4                  3.8.2-7        Tag Image File Format (TIFF) libra
ii  zlib1g                    1:1.2.3-13     compression library - runtime

Versions of packages netpbm recommends:
ii  gs-esp [gs]              8.15.3.dfsg.1-1 The Ghostscript PostScript interpr
ii  gs-gpl [gs]              8.54.dfsg.1-5   The GPL Ghostscript PostScript int

-- no debconf information


--- End Message ---
--- Begin Message ---
Version: 2:11.01.00-2

On 2007-05-09 Francesco Potorti` <[email protected]> wrote:
> Package: netpbm
> Version: 2:10.0-11
> Severity: minor
> File: /usr/bin/pnmtotiff

> The man page says:

>   -lzw doesn't really
>        work because the Tiff library doesn't do LZW compression.  It
>        used  to, but  its developers removed the function out of
>        concern about violating Unisys's patent.  This option remains
>        in case you use  a  Tiff  library that  cooperates,  now or in
>        the future.
[...]

In the current version pnmtotiff has been replaced by pamtotiff with
updated documentation.

cu Andreas
-- 
`What a good friend you are to him, Dr. Maturin. His other friends are
so grateful to you.'
`I sew his ears on from time to time, sure'

--- End Message ---

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