Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!decvax!decwrl!ucbvax!AIDS-Unix!Info-Graphics-Request From: Info-Graphics-Request@AIDS-Unix.UUCP Newsgroups: mod.graphics Subject: Info-Graphics Digest Message-ID: <8605170043.AA24375@ucbvax.Berkeley.EDU> Date: Fri, 16-May-86 00:14:32 EDT Article-I.D.: ucbvax.8605170043.AA24375 Posted: Fri May 16 00:14:32 1986 Date-Received: Sat, 17-May-86 23:28:22 EDT Sender: daemon@ucbvax.BERKELEY.EDU Reply-To: Info-Graphics@AIDS-Unix Organization: The ARPA Internet Lines: 315 Approved: info-graphics@aids-unix.arpa Info-Graphics Digest Thu May 15 21:14:32 PDT 1986 - Send submissions to Info-Graphics@AIDS-Unix - Send requests for list membership to Info-Graphics-Request@AIDS-Unix 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 ---------------------------------------------------------------------- Date: Mon, 28 Apr 86 06:10:22 edt From: tom allebrandi 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 ............... ------------------------------ Date: Mon, 28 Apr 86 16:24:53 pdt From: Peter Ross 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 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 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 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!" ------------------------------ End of INFO-GRAPHICS ********************