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To: bgardner@ATHENA.MIT.EDU
Subject: In case you didn't see this.  W
Date: Wed, 09 Nov 88 21:39:03 EST


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To: davis@ATHENA.MIT.EDU
Cc: vcg@ATHENA.MIT.EDU, jhmurray@ATHENA.MIT.EDU, dmorgen@ATHENA.MIT.EDU,
        mwsmith@ATHENA.MIT.EDU, purcell@media-lab, jf@ATHENA.MIT.EDU,
        fcmiller@ATHENA.MIT.EDU, penman@ATHENA.MIT.EDU, gid@media-lab,
        rubin@media-lab, danappple@media-lab, phils@ATHENA.MIT.EDU,
        smyser@ATHENA.MIT.EDU, wiggins@ATHENA.MIT.EDU, jdevans@ATHENA.MIT.EDU,
        janson@ATHENA.MIT.EDU, servin@ATHENA.MIT.EDU, afleishr@ATHENA.MIT.EDU,
        dz@media-lab, saltzer@ATHENA.MIT.EDU, geer@ATHENA.MIT.EDU,
        charlie@ATHENA.MIT.EDU, champine@ATHENA.MIT.EDU
Subject: Video tools
Date: Mon, 07 Nov 88 20:34:59 EST

Folks,
     I thought you might be interested in the tools that Phil Thompson
has generated (see message below) that enable video windows on the
media workstations to be captured in a format that can be readily
manipulated and displayed/printed using various image processing tools
(such as Phil's ximage program, xim, which is in the "contrib" section
of the X11R3 tape.)

     This Thursday, Nov. 10, Phil will be demonstrating xtoxim and xim
between 11:00 and 12 noon for a few of us here at the Computer
Resource Lab (in the media room, 9-520).  All of you are welcome to
attend (as are others not on the list -- I pieced the list together
from some old video-mail).

					-- Joe F.

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To: jf@ATHENA.MIT.EDU
Cc: smyser@ATHENA.MIT.EDU
Subject: Video tools.
Date: Mon, 07 Nov 88 16:29:03 EST


Joe,
	 Our inability to grab, store and print from our video camera,
disc, MIT cable, and tape sources has been a serious limitation to the
functionality our video resources and video itself.  After not getting
far with Athena concerning such video capture tools and capabilities,
I decided to find out and do something myself.

	In this light of this, I now present "xtoxim".  It can now
convert output from "xwd" into the more useful "xim" format used here.
This includes video. Once the images are in this format it is possible
to view them on any type of monitor using "xim" or do some futher
processing using the Utah Raster Toolkit.  The toolkit can further
convert color images to postcript, for good quality printing.  So it
is now possible to grab, process, send and print color X and video
windows.

	However, much of this image processing requires quite a bit of
memory.  The current 4 megs our video workstation is not enough.  The
raster toolkit and the color 24 to 8 bit quantization programs do not
have enough core space to work. It is also not possible to display
more than one image at once. I do not whether you can get additional
memory, but adding it to the video workstation would certainly be
necessary if we are to scan,cut/paste and generally process images
with our video facilities in the future.

	I also made modifications to a video widget to allow the
dithering to be turned of in still mode.  This is necessary to get the
best resolution when making the above screen dumps.  I'll send this
extension to the video-hackers and hopefully they will accept this as
a permanent feature.  I've talked to a few of them and they seem
interested.

	I'll put the video 'xtoxim' translator, modified 'xvideo' and
any other future related programs under /site/mit/public/vaxbin on the
video Vaxstation (m9-520-1).

Philip Thompson



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