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March 2005

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2005.03.22 17:20 "tif_jpeg.c and 12bit JPEG Files", by Frank Warmerdam
2005.03.22 18:03 "Re: tif_jpeg.c and 12bit JPEG Files", by Lee Howard
2005.03.22 18:17 "Re: tif_jpeg.c and 12bit JPEG Files", by Frank Warmerdam
2005.03.22 18:33 "Re: tif_jpeg.c and 12bit JPEG Files", by Joris Van Damme
2005.03.22 18:04 "Re: tif_jpeg.c and 12bit JPEG Files", by Bob Friesenhahn
2005.03.22 18:10 "Re: tif_jpeg.c and 12bit JPEG Files", by Frank Warmerdam
2005.03.22 18:22 "Re: tif_jpeg.c and 12bit JPEG Files", by Bob Friesenhahn
2005.03.22 20:00 "Re: tif_jpeg.c and 12bit JPEG Files", by David Gilbert
2005.03.22 20:25 "Re: tif_jpeg.c and 12bit JPEG Files", by Bob Friesenhahn
2005.03.22 20:38 "Re: tif_jpeg.c and 12bit JPEG Files", by Frank Warmerdam
2005.03.22 21:59 "Re: tif_jpeg.c and 12bit JPEG Files", by Bob Friesenhahn
2005.03.22 22:28 "Re: tif_jpeg.c and 12bit JPEG Files", by Frank Warmerdam
2005.03.22 22:41 "Re: tif_jpeg.c and 12bit JPEG Files", by Bob Friesenhahn
2005.03.29 11:24 "Re: tif_jpeg.c and 12bit JPEG Files", by Jean-yves Le Ridant
2005.03.29 16:08 "Re: tif_jpeg.c and 12bit JPEG Files", by Bob Friesenhahn
2005.04.01 08:08 "Re: tif_jpeg.c and 12bit JPEG Files", by Jean-yves Le Ridant
2005.03.22 21:19 "Re: tif_jpeg.c and 12bit JPEG Files", by Chris Cox
2005.03.22 21:36 "Re: tif_jpeg.c and 12bit JPEG Files", by Bob Friesenhahn
2005.03.31 10:04 "Re: tif_jpeg.c and 12bit JPEG Files", by Jean-yves Le Ridant
2005.03.22 21:37 "Re: tif_jpeg.c and 12bit JPEG Files", by Chris Losinger
2005.03.23 14:08 "Re: tif_jpeg.c and 12bit JPEG Files", by Jeff Mather

2005.03.22 18:03 "Re: tif_jpeg.c and 12bit JPEG Files", by Lee Howard

Frank Warmerdam wrote:

> Finally, the "Mk1" library is essentially a libjpeg fork.  There is
> discussion on the JPEG mailing list about how to move to a libjpeg7
> with similar capabilities.  While it is likely that a libjpeg7 would take
> a somewhat different approach than the Mk1 library, it is hoped that
> the work being done now will help in that transition.  

There was also some discussion on the JPEG mailing list about adding 
support for CIELAB JPEG (fax).  Patches to enable this support are 
available.  I believe that this discussion occurred a week or two 
earlier than David's post to that list.  In the end, however, it sounded 
like the libjpeg maintainers were not interested in applying such 
patches to libjpeg6, and indicated that they would not be looking at 
including them until "v7".  I have done some work to libtiff to allow 
libtiff to make use of CIELAB JPEG in a "patched" libjpeg.  I am 
interested in seeing this work make it into the libtiff CVS.  See:

  http://bugzilla.remotesensing.org/show_bug.cgi?id=736

As it appears to me that libjpeg development is essentially comatose, I 
think that a successful fork would be relatively easy to accomplish, and 
I fully support this endeavor.  I don't envision the future "v7" coming 
from that group of people anytime soon (years).

There are numerous enhancements and developments available for libjpeg 
(not limited to the CIELAB work I mention) that have been indefinitely 
"postponed" by the current libjpeg maintainers.  It is my recommendation 
to you that you incorporate as much of these patches and developments as 
possible into this fork so as to gain whatever development momentum and 
strength that can be acquired from the developers of those works.  I do 
not believe that it would take very long for the community as a whole to 
recognize the Mk1 library as libjpeg7.

Thanks,

Lee.