Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.ARPA Path: utzoo!watmath!clyde!burl!ulysses!ucbvax!aids-unix.arpa!Info-Graphics-Request From: Info-Graphics-Request@AIDS-UNIX.ARPA (Info-Graphics moderator Andy Croma Newsgroups: net.graphics Subject: Info-Graphics Digest Message-ID: <8509081904.AA11574@UCB-VAX.ARPA> Date: Sun, 8-Sep-85 06:00:58 EDT Article-I.D.: UCB-VAX.8509081904.AA11574 Posted: Sun Sep 8 06:00:58 1985 Date-Received: Mon, 9-Sep-85 03:03:15 EDT Sender: daemon@ucbvax.ARPA Reply-To: Info-Graphics@AIDS-Unix Organization: The ARPA Internet Lines: 699 Info-Graphics Digest Sun Sep 8 03:00:58 PDT 1985 - Send submissions to Info-Graphics@AIDS-Unix - Send requests for list membership to Info-Graphics-Request@AIDS-Unix Today's Topics: GKS Re: Dvorak and SIGGRAPH (rather long) volumetric displays Object Descriptions Wanted Re: Flight Simulators Wanted: Graphics Package for IBM PC & Mouse Re: Computer Vision newsgroup Re: Object Descriptions Wanted RGB to hue, intenstity, saturation conversion Re: Object Descriptions Wanted Info-Graphics is on autopilot for September. iis soft/hardware under Berkeley Unix. Re: Object Descriptions Wanted Re: Computer Vision newsgroup Scene models for boundary point (edge) detection Wanded: Video Overlay Device for IBM PC/VCR Re: Image processing articles? ---------------------------------------------------------------------- Date: 31 Aug 85 01:33:10 GMT From: decvax!genrad!panda!talcott!harvard!seismo!mcvax!ukc!reading!cybavax!mdb@Berkeley (Mr M D Butcher) Organization: University College Swansea, Wales Subject: GKS Errors-To: usenet-admin@Berkeley Does anyone know if GKS is available for the IBM PC ? Thanks in advance, Mike Butcher. ------------------------------ From: pur-ee!uiucdcs!convex!waltz!haddock@Berkeley Date: 26 Aug 85 17:43:00 GMT Subject: Re: Dvorak and SIGGRAPH (rather long) References: <1063@dual.UUCP> Errors-To: usenet-admin@Berkeley >Please, graphics people, give Dallas a chance. It's really a nice >place. And please, Siggraph planners, if it's going to be in >Dallas, how about late August or late September when it's cooler? Try late December.... :-) Late September would be best as this August has had numerous days at or above 100 degrees. Admittedly, this has been an UNUSUALLY warm summer (at least according to the weather people around here). ================================================================ _____ -Rusty- |\/ o \ o Texas Instruments | ( -< O o Where's the fish? Dallas, TX |/\__V__/ ARPA: Haddock%TI-CSL.csnet@CSNet-Relay.arpa or Rusty@Maryland CSNet: Haddock@TI-CSL USENET: {ut-sally, convex!smu, texsun, rice} ! waltz ! haddock ------------------------------ Date: 1 Sep 85 17:54:59 GMT From: decvax!mcnc!unc!hultquis@Berkeley (Jeffrey P. Hultquist) Organization: CS Dept, U. of N. Carolina, Chapel Hill Subject: volumetric displays Errors-To: usenet-admin@Berkeley A book, published in '66, mentions a "volumetric display" and describes such an animal in this way. Suppose you took a fishtank and filled it with some phospor with a non-linear excitation response. You could then pass two lasers through this medium at half the required triggering intensity, and thus excite any point in this volume by intersecting the beams. The book continues to state that no one had yet done this. Questions: In the past twenty years, has anyone tried to build such a device? If so; who, when, where, how, and did they publish their findings? Many thanks. PS: Please mail and I will post a summary to the net. --- decvax!mcnc!unc!hultquis ------------------------------ Date: 30 Aug 85 23:49:17 GMT From: sdcsvax!brian@Berkeley (Brian Kantor) Organization: UCSD wombat breeding society Subject: Object Descriptions Wanted Errors-To: usenet-admin@Berkeley Could some kind soul out there in pixel-land send me an object description or two, in machine readable form? I'm looking for some three-D relatively simple objects to play modelling and rendering experiments with, such as Martin Newell's teapot and the like. I can send a tape, or use anonymous ftp, or carrier pigeon, or whatever seems most appropriate. A thousand thanks! Brian Kantor UC San Diego Computer Graphics Lab decvax\ brian@ucsd.arpa akgua >--- sdcsvax --- brian ucbvax/ Kantor@Nosc ------------------------------ From: ucla-cs!lmiller@Berkeley Date: 2 Sep 85 17:14:05 GMT Organization: UCLA Computer Science Department Subject: Re: Flight Simulators References: <1112@mhuxt.UUCP> Errors-To: usenet-admin@Berkeley In article <1112@mhuxt.UUCP> evans@mhuxt.UUCP (crandall) writes: >Have there been any developments in flight simulators... >Any comments on what is minimal hardware-- >is an Amiga with its graphics hardware in the ballpark? During the past 18 months we have been building/writing flight simulators using IRIS terminals and workstations, primarily for investigating pilot- aircraft interfaces and expert systems for aircraft and pilot performance. We've added joysticks, throttles, voice I/O, and lots of tools for rapidly interacting with the display tables. The screen resolution is 767x1023, 12 bits per pixel, double buffered (leaving 6 per swappable image, less 2 reserved for certain background images, or 16 colors on the screen at any one time). This number of colors is marginally adequate. The resolution is fine. We do a substantial amount of non-graphics calculations per display loop, so we're updating the image between 5 and 10 times per second--not quite adequate for smooth motion. Ten updates per second is the minimum you'd want. Obviously, we do lots of tricks to get as much speed as possible, but other issues are more important now. We designed and built our own joystick/throttle and interfaces, using one of the RS-232 ports on the IRIS. Our joystick is a 9600 baud ASCII device that sends its x, y and throttle values (using A to D's and an 8008) when queried by the program. The joystick itself was obtained from a used aircraft parts shop, but there are new ones with all the A/D's built in that are not very expensive. Or you can go to McFadden controls and get real simulator hydraulics for 50K each. Plus an oil change every 1,000 hours. You will tire of slow, low resolution, poorly modelled flight quickly. An IRIS or equivalent (raster tech, chromatics, etc.) with fast graphics computing is the minimum you will want. There is still lots of other computations needed. The IRIS workstations are in the 40-60 K region, as I recall. Aerodynamic simulations can be reasonable with only very simple models. It is not necessary to model all the flow equations, since they turn out to be inaccurate anyhow, and it is the solutions you want. For special circumstances, such as ground effect, simple heuristics are best. By the way, we are interested in hearing from experienced UNIX/C programmers, with extensive graphics background, who also have a pilot's license. The work is being done at ISI. L. Miller {lmiller@isi-hobgoblin or lmiller@ucla-locus} ------------------------------ Date: 4 Sep 85 06:48:06 GMT From: vax135!cornell!uw-beaver!uw-june!entropy!dataio!butler!olivier@Berkeley (Charles Olivier) Organization: Butler - Controls Div., Kirkland WA Subject: Wanted: Graphics Package for IBM PC & Mouse Errors-To: usenet-admin@Berkeley I am looking for a graphics package for the IBM PC that contains graphics primatives that can be used with a Hercules Monochrome Graphics card. Also does anyone know of a mouse interface for the IBM PC ? Thanks in advance. Charles Olivier P.O. Box 2249 Kirkland Wa 98083 uucp: ...uw-beaver!{tikal,teltone}!dataio!butler!olivier & Email ------------------------------ Date: 5 Sep 85 06:13:22 GMT From: decwrl!turtlevax!ken@Berkeley (Ken Turkowski) Organization: CADLINC, Inc. @ Menlo Park, CA Subject: Re: Computer Vision newsgroup References: <11307@rochester.UUCP> Errors-To: usenet-admin@Berkeley In article <11307@rochester.UUCP> sher@rochester.UUCP (David Sher) writes: >A short time ago there was a discussion of whether there should >be a group for discussion of image processing/computer vision such as >net.ai.vision. ... Right now such discussion >is going on in net.graphics. This results in me n'ing about 75-90% >of the articles in order to separate out the articles that pertain to >my research! When you read through the printed literature on pattern recognition, don't you also have to weed through articles not pertaining to your research? >While many graphics people are interested in computer vision >many computer vision researchers and experts are not interested in graphics! >(me for one). Anyway since it is a field that has hundreds of researchers >on the net and many people are interested in it I suggest that the >issue be reopened about whether net.ai.vision should exist. It is unclear that a subgroup of AI would be the proper group. Part of vision is concerned with image processing, the other with pattern recognition. The mathematics associated with these is substantially dissimilar that such discussions may not belong in the same group. The image processing portion is a subset of signal processing, and who knows what kind of mathematics is used for pattern recognition (fuzzy set theory? statistics?). How about net.sigproc or net.signal for discussions about signal processing? This would include things like analog and digital filters, stability, anti-aliasing, image processing, Kalman filters, parameter estimation, correlation, signal theory, source coding, etc. What sort of interest is there in such topics? What techniques are used in computer vision? What are the current hot topics? Who knows? Who cares? Of those who care, what are your other interests? What sort of catagories make sense to interest a critical mass of people? Or should there be a mailing list set up for such things? Kahn at UCLA has such a mailing list for ARPA-type people, but it has been VERY inactive. Lets have some discussion! David Sher, are you there? How about other researchers and hackers? -- Ken Turkowski @ CADLINC, Menlo Park, CA UUCP: {amd,decwrl,hplabs,seismo,spar}!turtlevax!ken ARPA: turtlevax!ken@DECWRL.ARPA [For readers on the ARPANET, there is a Digest named VISION-LIST managed by Tod Levitt. To request that you be added to that list, send mail to VISION-LIST-REQUEST@AIDS-Unix.ARPA. -- asc] ------------------------------ Date: 5 Sep 85 15:36:05 GMT From: decvax!genrad!panda!talcott!harvard!gcc-bill!brad@Berkeley (Brad Parker) Organization: General Computer Company, Cambridge Ma (Home of the HyperDrive) Subject: Re: Object Descriptions Wanted References: <1074@sdcsvax.UUCP> Errors-To: usenet-admin@Berkeley In article <1074@sdcsvax.UUCP> brian@sdcsvax.UUCP (Brian Kantor) writes: >Could some kind soul out there in pixel-land send me an object >description or two, in machine readable form? I'm looking for some >three-D... I hate "me toos", but I'd like to grab onto anything pass around also! (some of us don't have ps-2's laying around....) ;-) Thanks. -- J Bradford Parker uucp: seismo!harvard!gcc-bill!brad "She said you know how to spell AUDACIOUSLY? I could tell I was in love... You want to go to heaven? or would you rather not be saved?" - Lloyd Coal ------------------------------ id a005844; 6 Sep 85 9:57 BST From: Ralph Martin (on ICF GEC 4090 at Cardiff) Date: Thu, 5 Sep 85 12:15 BST Subject: RGB to hue, intenstity, saturation conversion I would be grateful if anyone can give me some references on how to do this. Specifically, references to journal articles, especially recent ones, would be much appreciated. (I have come up with a scheme for doing this, and want to see how it compares to other schemes that are already known). Thanks, Ralph ------------------------------ Date: 6 Sep 85 02:06:20 GMT From: uwvax!derek@Berkeley (Derek Zahn) Organization: U of Wisconsin CS Dept Subject: Re: Object Descriptions Wanted References: <1074@sdcsvax.UUCP>, <302@gcc-bill.ARPA> Errors-To: usenet-admin@Berkeley >Could some kind soul out there in pixel-land send me an object >description or two, in machine readable form? I'm looking for some >three-D... I hate to sound stupid, but what does that mean? Object descriptions? (you mean spheres, the statue of liberty, or what?) Machine readable form? Is there some standard machine-readable form I never noticed? Also, could you post a summary of your replies to the net? I am not sure what you want, but I want it too! derek -- Derek Zahn @ wisconsin ...!{allegra,heurikon,ihnp4,seismo,sfwin,ucbvax,uwm-evax}!uwvax!derek derek@wisc-rsch.arpa ------------------------------ Date: 7 Sep 1985 00:44-PDT From: Andy Cromarty Subject: Info-Graphics is on autopilot for September. For a couple weeks in September, the Info-Graphics Digest will be running completely automated. Any requests for list membership additions, deletions, etc. will be delayed for a couple weeks during that time. I'll try to handle all requests before 1-Oct-85. Andy Cromarty Info-Graphics-Request@AIDS-Unix ------------------------------ Date: 5 Sep 85 17:58:38 GMT From: decvax!mcnc!philabs!scb@Berkeley (Sean Byrne) Organization: Philips Labs, Briarcliff Manor, NY Subject: iis soft/hardware under Berkeley Unix. Errors-To: usenet-admin@Berkeley Anyone know of the existence of iis software written for berkeley? I have seen it for VMS (yuk) but I want it to run under Unix. So, any pointers would be appreciated. Thanks, -- USENET- .... Sean Byrne 5 years . /\ . CSRG, Philips Laboratories of anarchy . / \ . Briarcliff Manor, NY 10510 freedom . / \ . (914) 945-6242 and ---/------\--- chaos. /. .\ UUCP: {allegra,decvax,ihnp4}!philabs!scb / . . . \ EUNET: {prlb2,mcvax,phlash}!philabs!scb ------------------------------ Date: 6 Sep 85 20:16:50 GMT From: decwrl!spar!turtlevax!ken@Berkeley (Ken Turkowski) Organization: CADLINC, Inc. @ Menlo Park, CA Subject: Re: Object Descriptions Wanted References: <1074@sdcsvax.UUCP>, <302@gcc-bill.ARPA> Errors-To: usenet-admin@Berkeley In article <302@gcc-bill.ARPA> brad@gcc-bill.UUCP (Brad Parker) writes: >In article <1074@sdcsvax.UUCP> brian@sdcsvax.UUCP (Brian Kantor) writes: >>Could some kind soul out there in pixel-land send me an object >>description or two, in machine readable form? I'm looking for some >>three-D... > >I hate "me toos", but I'd like to grab onto anything pass around also! >(some of us don't have ps-2's laying around....) A year and a half ago, I posted as a Christmas present Frank Crow's Flexible Image Generation Environment. Along with the code were posted some data objects: If you look in your net.sources archives for December 1983, you'll find: tube.std - a cylinder tubend.std - a cone champagngl.std - a champagne glass (Phong's?) icosa_pcl.std - an icosohedron icosa_vcl.std - an icosohedron trunc_pyr.std - a truncarted pyramid chkrbd.std - a checkerboard banana.std - a banana egg.std - an egg klnbtl.std - a Klein bottle -- Ken Turkowski @ CADLINC, Menlo Park, CA UUCP: {amd,decwrl,hplabs,seismo,spar}!turtlevax!ken ARPA: turtlevax!ken@DECWRL.ARPA ------------------------------ Date: 7 Sep 85 01:22:57 GMT From: decvax!genrad!panda!talcott!harvard!seismo!rochester!sher@Berkeley (David Sher) Organization: U. of Rochester, CS Dept. Subject: Re: Computer Vision newsgroup References: <11307@rochester.UUCP>, <888@turtlevax.UUCP> Errors-To: usenet-admin@Berkeley > > When you read through the printed literature on pattern recognition, > don't you also have to weed through articles not pertaining to your > research? I never have to avoid billions of articles on graphics, I don't get the graphics literature because of this. Most of the pattern recognition literature has some application to my studies however. > Ken here discusses pattern recognition vs image processing > There is a fine line between patter recognition and image processing. Much of image processing implicitly is involved in recognizing patterns in images and enhancing them. Image enhancement can ease the job of a pattern recognizer. As far as the mathematics of pattern recognition it is a hodgepodge of signal detection theory, information theory, biological models, and statistical inference. (I probably missed some). > > How about net.sigproc or net.signal for discussions about signal processing? > This would include things like > analog and digital filters, X > stability, ? > anti-aliasing, * > image processing, * > Kalman filters, ? Whats a Kalman filter? What is it for? (I am a converted AI/Logic person and don't have a very complete knowledge of signal processing. (I will by the time I finish my thesis though!)) (feel free to mail me if not of general interest) > parameter estimation, * > correlation, * > signal theory, * > source coding, etc. X > > What sort of interest is there in such topics? What techniques are > used in computer vision? What are the current hot topics? Who knows? > Who cares? Of those who care, what are your other interests? What > sort of catagories make sense to interest a critical mass of people? > I have anotated the list of topics above according to what is relevant to my picture of computer vision. * means that it is relevant, X means that it is irrelevant, and ? means I don't know what is refered to. Some hot topics in computer vision are: reconstructing the 3D scene from a 2D image : Subtopics shape from shading shape from optical flow deriving optical flow from images 3D motion from optical flow 3D motion from a sparse set of correlated points Evidence theory (combining the output of unreliable operators to get reliable results) Segmentation Object recognition Passive Navigation Models of the human visual system These are the kinds of topics I have come in contact with here at the University of Rochester. I will be glad to post short explanatory notes (at my convinience of course) explaining the meaning of some of these obscure names. There is no doubt much work in computer vision that is not done according to these topics so if anyone has any additions let me know. > Or should there be a mailing list set up for such things? Kahn at UCLA > has such a mailing list for ARPA-type people, but it has been VERY > inactive. Lets have some discussion! David Sher, are you there? How > about other researchers and hackers? Possibly the reason for the inactivity has been poor publicity. I just heard about it in response to my message! I think one can send to this group by mailing to vision@aids-unix but am not sure this is correct. I will probably soon send a message to net.graphics and vision@aids-unix about scene models. Oh yes, I am here but should be working on my thesis! > -- > Ken Turkowski @ CADLINC, Menlo Park, CA > UUCP: {amd,decwrl,hplabs,seismo,spar}!turtlevax!ken > ARPA: turtlevax!ken@DECWRL.ARPA *** REPLACE THIS LINE WITH YOUR FOOLISHNESS *** -- -David Sher sher@rochester seismo!rochester!sher ------------------------------ From: decvax!genrad!panda!talcott!harvard!seismo!rochester!sher@Berkeley Date: 7 Sep 85 02:48:12 GMT Organization: U. of Rochester, CS Dept. Subject: Scene models for boundary point (edge) detection Errors-To: usenet-admin@Berkeley From: David Sher I accidently sent the beginning of this article before it was finished so if you see an incomplete version of this I apologize. Anyway, I recently presented a paper to the Workshop on Probability and Uncertainty in AI on detecting boundary points (like edges but unoriented) from small windows based on probabilistic scene models. I encountered some criticism with regard to the "realism" of my scene models. Here is the scene model I used: 1. Regions (the things the boundaries are about) have no internal variation in graylevel (I am using black and white currently). 2. The noise has no known spacial structure and the probability of observing a gray-level at a point with a specified gray-level is known. 3. A small (3x3) window only intersects one boundary at a time or no boundary at all. 4. Only the (3x3) window is relevant to the probability of a boundary. (This is the meaning of restricting the operator to a window.) 5. The misregistration is a sufficent problem that the spactial structure within the small (3x3) window is not significant. Using models of this form I directly derived certain near optimal boundary detectors and analyzed some other simple ones. The reason I chose models of this form is the optimal operators vary in complexity with the complexity of the model and their computational complexity varies exponentially (intuition not mathematics) with the complexity of the model. This puts a large cost on naive analysises with complex models. Also this kind of model is close to the models commonly used by researchers in this area (such as Canny). I am now considerring more complex models but am not sure which way to go. Some possible more general models would: - Replace assumption 5 with a description of the possible spacial structures of small windows on and off boundaries. - Add blur type noise to assumption 2 (I am not sure exactly the best way to do this) - Replace assumption 1 with an assumption about the reflectance (or possible reflectances) of the objects and the sun position Any suggestions? By the way I have seen: %A Leonard P. Wesley %A Allen R. Hanson %T The Use of an Evidential-Based Model for Representing Knowledge and Reasoning about Images in the Visions System %K VISION DEMPSTER SHAFER EVIDENCE PROBABILITY THEORY %J PAMI %D Sept 1982 %V 4 %N 5 %P 14-25 %I IEEE %X Describes how Dempster-Shafer evidence theory is used for interpretation of a segmented image. Takes segemented image with statistics about each segment and binary relationships between segments and applies a known probability structure to it. %A David Sher %T Developing and Analyzing Boundary Detection Operators Using Probabilistic Models %K VISION PROBABILITY STATISTICS BAYES %J Workshop on Probability and Uncertainty in Artificial Intelligence %D August 1985 %I ACM,RCA %X Describes how evidence from boundary detectors can be combined if the boundary detectors take on a certain form. This form is to generate the likelihood of a boundary rather than the probability. Demonstrates how boundary detectors of this form can be constructed directly from a probabilistic model of the image and its boundaries. Also demonstrates how an established operator, the gradient, be converted into an operator of this form. Discusses what this tells us about the gradient. %A Hsien-Che Lee %A King-Sun Fu %T Generating Object Descriptions for Model Retrieval %D Sept 1983 %K VISION SURFACE 3D MODEL %J PAMI %V 5 %N 5 %P 462-471 %I IEEE %X Describes a system to return 3-D information starting with grey level image. First pass segments the image according to local grey level information such as gradients. Next uses this to select a target area. Then does edge detection & linking and forms chain codes of edges. Uses the result to extract regions with a slight perference to over fragmentation which will be reversed by 3D information. Uses shape of regions and regularity constraints like skew symmetry to derive 3D information. Picks region whose position indicates least slant and uses that to further constrain the image. Like Waltz filtering but on plane intersections rather than on junctions, thus more robust. %A John Francis Canny %T Finding Edges and Lines in Images %K VISION EDGE LINE %D June 1983 %I MIT Artificial Intelligence Laboratory %R 720 %X I quote from the Conclusion: ... %A Vishvjit S. Nalwa %T On Detecting Edges %K VISION EDGE %J Proceedings: Image Understanding Workshop %D October 1984 %P 157-164 %I Image Processing Techniques Office, Defense Advanced Research Projects Agency %X Describes a very good edge detector. It tries to fit a serries of surfaces over a window. If a plane in intensity space fits the window well then it isn't an edge. If a model of a step edge fits better than a quadratic surface then it is an edge. Determine the depth of the edge from the surface that was fit to the window. %A Thomas O. Binford %T Inferring Surfgaces from Images %K VISION MODEL SURFACE EDGE %J Artificial Intelligence %D August 1981 %V 17 %N 1-3 %P 205-244 %I North-Holland Publishing Company %C Amsterdam %X Describes a model of image description. Gives a set of criterion for interpretation of various kinds of 3-d edges,lines and discontinuities within them. Describes some criterion for edge detectors and a hack which binford particularly likes. %A Larry S. Davis %A Azriel Rosenfeld %A Steven W. Zucker %T General Purpose Models: Expectations about the Unexpected %K VISION MODEL %D January 1975 %I University of Maryland %R TR-347 %X Shows a need for models that do not describe specific situations. Describes some of the features such models might have. Describes when such models might be necessary and when they are unnecessary. General purpose models are applicable even when we have little or no a priori knowledge about the class of scenes that is to be analyzed. This work is notably vague. %A Allen R. Hanson %A Edward M. Riseman %T VISIONS: A Computer System for Interpretting Scenes %K VISION VISIONS HIGH LEVEL MODEL %D 1978 %P 303-334 %I Academic Press %B Computer Vision Systems %E Allen R. Hanson %E Edward M. Riseman %C New York %C San Francisco %C London %X Description of high level part of the VISIONS system. Assumes segmented images. works largely by matching segments with similar parts of models. Matching strategy determined flexibly. Strategy optimized to model being matched. Use of model dependent information emphasized. Use of knowledge of 3D constraints aeffects also. %A Dana H. Ballard %A Chris M. Brown %A Jerome A. Feldman %T An Approach to Knowledge-DIerected Image Analysis %K VISION HIGH LEVEL MODELS %D 1978 %P 271-282 %I Academic Press %B Computer Vision Systems %E Allen R. Hanson %E Edward M. Riseman %C New York %C San Francisco %C London %X Describes how a vision system might work. Introduces the concept of the sketch map between low level segmentation and high level model. The system described is query directed. The system seems to be bottom up to sketch map and top down to sketch map. -David Sher sher@rochester seismo!rochester!sher -- -David Sher sher@rochester seismo!rochester!sher ------------------------------ Date: 6 Sep 85 06:28:28 GMT From: tektronix!uw-beaver!uw-june!entropy!dataio!butler!olivier@Berkeley (Charles Olivier) Organization: Butler - Controls Div., Kirkland WA Subject: Wanded: Video Overlay Device for IBM PC/VCR Errors-To: usenet-admin@Berkeley (For the line eater [if its still around]) Hello, Does anybody know of any cheap method of doing video overlay with an IBM PC. I have an IBM PC and a VCR, and I would like to over text (& graphics data from my pc). Can this be done cheaply? Does anyone know of some hardware that can plug into or be attached to the pc/or VCR to allow overlaying?? I would appreciate any HELP that I can get. THANKS in ADVANCE !! P.S: I am capable of building any hardware and writing the required software. Charles Olivier P.O. Box 2249 Kirkland Wa 98083 uucp: ...uw-beaver!{tikal,teltone}!dataio!butler!olivier & Email ------------------------------ Date: 2 Sep 85 01:26:28 GMT From: ihnp4!stolaf!umn-cs!srcsip!meier@Berkeley (Christopher M. Meier) Organization: Honeywell SRC (SIP), Mpls MN Subject: Re: Image processing articles? References: <301@ur-laser.uucp>, <274@aoa.UUCP> Errors-To: usenet-admin@Berkeley >>So what happened to the 25-30 people who voted "yes" for the IP group? >> >> {seismo,allegra}!rochester!ur-laser!nitin.uucp > >To sum up, I feel there is a hardware difference between IP and CG. >Most postings to .graphics relate to graphic terminals, graphic >software, and printer/plotters. I do agree there should be some >honest discussion/interest related to image aquisition, >pre/post-processing, analog video signal processing, (not VCR, Beta, etc.) >vision systems and real-time scene analysis to warrant the creation of >net.image. > Dean Wormell I am one of 50+ people who work on image processing at Honeywell. We are interested in the creation of net.image for the discussion of image proc. topics. I am sure there are other IP groups out there, let's here from you. Christopher Meier Honeywell Systems & Research Center Signal & Image Processing ihnp4!umn-cs!srcsip!meier ------------------------------ End of INFO-GRAPHICS ********************