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Info-Graphics Digest	Thu May 15 21:14:32 PDT 1986

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Today's Topics:

 Looking for information
 want info leading to Xenix driver for Raster Tech 1/80
 May LA Siggraph Meeting
 Bay Area SIGGRAPH
 please pass this to appropriate parties
 RGB to NTSC Encoders

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Date: Mon, 28 Apr 86 06:10:22 edt
From: tom allebrandi <edison!ta2%virginia.csnet@CSNET-RELAY.ARPA>
Subject: Looking for information


Can anyone point me to a source that will help me solve the following
problem?

I have a laser printer that only draws horizontal and vertical lines - and
not many of them at that! (Due to band buffer limitations.) I know how to
create font loads for this printer; I am thinking about imaging the picture 
that I wish to print (in the VAX - god love virtual memory) and then convert
the result to a font load. The easy way to do this seems to be to simply sub-
divide the workspace into a collection of rectangles and create the character
glyphs from that. This approach bothers me for a couple of reasons: 1) What
is the optimum height of the glyphs/rectangles; 2) won't I be encoding a lot
of white space? I also could scan the image, doing corner point encoding
to recognize objects and then generate the glyphs from that. The problem
with that approach is that the corner point encoding algorithms I have
are all GE proprietary.

I could go on and on but won't. If you have the jist of what I tried
to explain, and can point me to a source of information please send
me mail.

Thanks!
Tom	#-}
...............
tom allebrandi		general electric automation controls operations
ta2@edison.uucp		edison!ta2%virginia@csnet-relay.arpa
(804) 978-5566		box 8106, charlottesville, va, 22906
...............


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Date: Mon, 28 Apr 86 16:24:53 pdt
From: Peter Ross <peter%isc.intel.com@CSNET-RELAY.ARPA>
Posted-Date: Mon, 28 Apr 86 16:24:53 pdt
Subject: want info leading to Xenix driver for Raster Tech 1/80


I am connecting a Raster Tech Model One/80 (1280x1024x24) display controller
to an IKON Multibus I/DR11-W interface card in an Intel 286/310 system.
Another connection from the 310 is to one of our Hypercubes;
not bad um ... peripherals for the 310 (tail? dog?). I want the device driver
to transfer bytes (user-code writes/reads) to/from the Raster Tech.
I have a document with a suggested DR11-W protocol, and would appreciate
driver source (Xenix or Unix), or info on Raster Tech's version of
DR11-W signals/protocol, or other implementation suggestions.

Thanks,

	Peter Ross

	UUCP:		tektronix!reed!omssw2!intelisc!peter
	CSNET,ARPA:	peter%isc.intel.com@csnet-relay


------------------------------

Date: Thu, 1 May 86 12:14:27 pdt
From: jisdale@omnilax (Jerry Isdale)
Subject: May LA Siggraph Meeting

	Los Angeles SIGGRAPH May Meeting Announcement

	Speakers: Art Durinski, Toyo Links Corp, Tokyo Japan
		  Craig Reynolds, Symbolics, LA, CA
		  Larry Yaeger, Digital Productions, LA, CA

	Subject: Future Directions for Computer Graphics

	Date: 	Wednesday, May 14, 1986
		Refreshments: 	6:30 - 7:30pm
		Meeting:	7:30 - 9:30pm

	Location: Cal State, Fullerton
		Fine Arts Building (near parking lot D)
		800 North State Collage Drive
		Fullerton, CA 92634

	Each speaker will discuss the future directions Computer
	Graphics might take, based on their personal areas of
	expertise.  Craig Reynolds is author of the MIT/III ASAS
	scripting system and is currently working at Symbolics in
	Westwood with LISP based animation systems. Larry Yaeger is one
	of the chief programmers at Digital Productions and is
	responsible for many of the outstanding images of fluid flows,
	etc.  created on DP's Cray X/MP.  Art Durinski is one of the
	most experienced Creative Directors in the computer animation
	industry.  For nearly 10 years he was very active in the LA
	graphics community, both in the commercial world (III, Digital
	Productions, Omnibus, etc.) and teaching at UCLA.  Art is
	currently working for Toyo Links in Japan. His return is
	eagerly anticipated.

	Cal State Fullerton is located approximately 2 miles north
	of the Anaheim Convention center, where NCGA will be held
	during the week of May 14. All attendees of the NCGA conference
	are invited to attend what promises to be a very interesting
	LA Siggraph meeting.

For Further Information:
	SIGPHONE: (213) 392-1074
		Los Angeles ACM/Special Interest Group on Computer GRAPhics
		PO BOX 90698
		World Way Postal Center
		Los Angeles, CA 90009

	ARPA/CSNET: jisdale@omnilax
		Jerry Isdale
		Omnibus Computer Graphics

	USENET:	randvax!able!collier
		Nancy Collier
		Able Image Research
		(213) 462-8100 x209


------------------------------

Date: Wed, 7 May 86 16:31:45 PDT
From: stephan@wilbur.ARPA (Stephan Keith)
Subject: Bay Area SIGGRAPH




               San Francisco Bay Area ACM/SIGGRAPH Announcement

     - TITLE: COMPUTER VISION - The Structured Description of Space

     - WHO: Alex Paul Pentland, Ph.D

       _A_B_S_T_R_A_C_T:

       The shape representations currently used In Artificial Intelligence were
       originally developed to be used in other disciplines such as physics and
       engineering.  These representations have not proven entirely suitable to
       the  AI  tasks  of  perception  and  reasoning.   Researchers in AI have
       developed more specific representations to accurately describe a variety
       of  natural  and  man  made forms in a succinct and natural manner.  The
       approach taken in this representational  system  is  to  describe  scene
       structure  at a scale that is more similar to our own  perceptual notion
       of "a part", by using descriptions that  reflect  a  possible  formative
       history of the object.  A possible formative object history might be how
       an  object  could  be  constructed  from  lumps  of  clay.    For   this
       representation  to  be  useful,  it  must  be  possible  to recover such
       descriptions from image data.  We show that the  primitive  elements  of
       this  representation  may  be  recovered  in  an  over  constrained  and
       therefore potentially reliable manner.

       _B_I_O_G_R_A_P_H_Y:

       Upon receiving his Ph.D from MIT in 1982, Alex Paul Pentland joined  SRI
       International's  Artificial  Intelligence Center.  He has taught in both
       the Computer Science and Psychology Departments at Stanford  University,
       and currently is Program Manager for the Visual Communication Project at
       Stanford's Center for the Study of Language  and  Information.   He  has
       done  research in artificial intelligence, machine vision, human vision,
       and graphics.  In 1984, he won the Best Paper prize  from  the  American
       Association  for  Artificial  Intelligence  for  his  work using fractal
       functions to model complex natural scenes.  He recently finished a  book
       entitled _F_r_o_m _P_i_x_e_l_s _t_o _P_r_e_d_i_c_a_t_e_s, to be published by Ablex Publishers.


     -> WHEN: 8:00 pm, Tuesday, 20 May 1986.

     -> WHERE: Skilling Auditorium, Stanford Campus



     -> ADMINISTRATION: Want to get involved? Help in  any  capacity?  Want  to
     lecture  about a topic in Computer Graphics?  Please contact Dan Clarke at
     408/496-7302.

     -> ELECTRONIC THEATRE: The San Francisco Bay Area SIGGRAPH  is  sponsoring
     an  Electronic  Theatre  composed  of  work  submitted  by  Local Computer
     Artists.  You are invited to consider submitting work.  Format for artwork
     submitted  is  to be in one of the following forms only: 3/4" Video, Beta,
     VHS, 16 mm film, 35mm Slides.  Deadline for submissions is  mid-September.
     Show  date  is late-November.  For more information, please contact Helena
     as follows:

             Helena Anderson         415/849-9583
             Program Chair
             Bay Area SIGGRAPH
             P.O. BOX 3553
             Santa Clara, CA  95055


------------------------------

Date: Wed,  7 May 86 23:58:29 EDT
From: Richard Barth <BARTH@MC.LCS.MIT.EDU>
Subject: please pass this to appropriate parties
        info-graphics@AIDS-UNIX.ARPA, info-micro@BRL.ARPA,
        intro%umass.bitnet@WISCVM.WISC.EDU

   This message doesn't fit the pattern of mail you normally get from
this group. I am sending it-  once only-  because I think the people
who will read this are in a position to get this information to those
who need it badly. If this doesn't concern you directly, pass
it along. If you're affiliated with a college or university, please
send a hard copy to the E.E. and meteorology departments.

                   ------------------------------

    The TIROS-N meteorological satellites are operated by NOAA
to track storms and provide other environmental information.
The data collected are sent down to earth on radio frequencies
of 1700-1710 MHz, among others. These data can be received by
anybody who cares to listen to them, and a number of colleges,
weather forecasters, and private individuals listen regularly.
No license and no permission are needed.

   The Federal Communications Commission is now considering a
proposal to allow into this band a new type of radio device
which could seriously interfere with the reception of these
satellite signals. The satellite receivers are legally entitled
to protection, but before they can be protected they have to be
identified. If you are receiving these signals, or expect to be
receiving them in the future, please contact NOAA for information
on how your reception can be protected. There is no charge for
this information, and you incur no obligation by asking for it.

   Whether or not you identify your receiver to NOAA, you're 
at liberty to continue listening to these signals. If you don't
register your receiver, however, you run the risk of not being
able to hear them much longer.

   For details, write:

       U.S. Dept. of Commerce
       Office of Radio Frequency Management
       Room 6106, Main Commerce Building
       Washington DC 20230

Or call (202) 377-0635

Or send the name and address of an appropriate contact to:

      BARTH@MIT-MC via the net, or
      RBARTH  via MCI Mail

 

------------------------------

Date: Wed, 7 May 86 21:45:09 pdt
From: Craig Bowman <cyadrin%noah.arc.cdn%ubc.csnet@CSNET-RELAY.ARPA>
Mmdf-Warning:  Parse error in original version of preceding line at CSNET-RELAY.ARPA
Subject: RGB to NTSC Encoders

	I'm trying to put together a list of available signal encoders
which convert RGB graphics terminal outputs into NTSC composite. The
only model I've seen to date is the CVP-100 Computer Video Processor
by Michael Cox Electronics.
	Although this unit claims: "Converts any computer line and
vertical refresh rate up to 1029 lines" it appears to use a real
'bowling-shirt' method to do this. ie. it drops certain scan lines
to achieve the reductions to 525 lines. No smoothing seems to be
applied.
	In a test we hooked the unit to a LEXIDATA 2400 Solidview
terminal and fed the NTSC composite to a SONY BVH-2500 Animation
Video Recorder. Using a shaded sphere as the test image we noticed
that the drop scan line approach produced a moire pattern in the
sphere. Not acceptable.

	If anyone is currently using, or knows of any encoders that
are commercially, or otherwise available I would be very grateful
if you could send me some info about them. ie. Bandwidth, Range
of input for Horizontal and Vertical Frequencies, Source of NTSC
reference signal for encoder, etc.

	If enough info comes in and there are requests for the list,
I'll assemble and post to the digest.

		Craig Bowman <cyadrin@noah.arc.cdn>

		Cyadrin Technologies Ltd.
               Suite 148, Calgary Advanced Technology Centre
               6815 8th Street N.E.
               Calgary, Alberta
               Canada
               T2E 7H7

               (403) 275-3153

"It's easier to tell everyone you're crazy, than to drive yourself insane
 trying to prove your sanity!"



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End of INFO-GRAPHICS
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