Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!usc!ucsd!ucbvax!ADS.COM!Vision-List-Request From: Vision-List-Request@ADS.COM (Vision-List moderator Phil Kahn) Newsgroups: comp.ai.vision Subject: Vision-List delayed redistribution Message-ID: <9006090400.AA20776@deimos.ads.com> Date: 9 Jun 90 00:37:22 GMT Sender: daemon@ucbvax.BERKELEY.EDU Reply-To: Vision-List@ADS.COM Distribution: inet Organization: The Internet Lines: 246 Approved: vision-list@ads.com Vision-List Digest Fri Jun 08 16:37:23 PDT 90 - Send submissions to Vision-List@ADS.COM - Send requests for list membership to Vision-List-Request@ADS.COM Today's Topics: List of industrial vision companies Curvature for 2-D closed boundary description Array Technologies Color Scanner CVGIP table of contents: Vol. 51, No. 2, August 1990 ECEM6 1991 Eye-Movements Conference, First Call Evans & Sutherland PS390 FOR SALE!! ---------------------------------------------------------------------- Date: 4 Jun 90 19:45:50 GMT From: Brian Palmer Subject: List of industrial vision companies Organization: Bolt Beranek and Newman Inc., Cambridge MA Well Samir and my attempts to generate a list of Industrial Vision companies is going slowly. Please continue to send info! I will post the summary. The final posting will contain all related information but for now here is the list of companies mentioned. Automatix Cognex Datacube View Engineering (still alive?) Adept GMF Intelledex Focus Systems Please send more names and a little info on the company. Also, if you know anything about the above (some descriptions were short) please pass that along too. Thanks, Brian ------------------------------ Date: 6 Jun 90 23:17:11 GMT From: zeitzew@CS.UCLA.EDU (Michael Zeitzew) Subject: Curvature for 2-D closed boundary description Organization: UCLA Computer Science Department From: O. Mitchell and T. Grogan "Global and Partial Shape Discrimination for Computer Vision" Optical Engineering, Volume 23, Number 5, September 1984. pg.484-491 A portion (section on the Fourier-Mellin Correlation) can be summarized as follows : +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ If the boundary function $z(i) = x(i) + \jmath y(i)$ is twice differentiable, the the curvature function, denoted by $\kappa(i)$ is given by : \[ \kappa(t) = \partial / \partial t \;\; \arctan \dot{y}(t) / \dot{x}(t) \] A discrete approximation of the curvature is : \begin{eqnarray} \kappa(i) = \arctan \frac{y_{i} - y_{i-1}}{x_{i} - x{i-1}} - \\ \arctan \frac{y_{i-1} - y_{i-2}}{x_{i-1} - x_{i-2}} \;\;i=0,\ldots,N-1 \nonumber \end{eqnarray} The curvature function provides a contour description which is invariant under translation and rotation..... +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Does anyone know why the definition of curvature is given as the partial derivative with respect to "time", and not "arc length" as one would see in a first year Calculus book ? What are the assumptions/implications here ? If this is a stupid/obvious/boring question, I'm sorry. If you care to e-mail me a response, thank you in advance. Mike Zeitzew zeitzew@lanai.cs.ucla.edu ------------------------------ Date: Thu, 7 Jun 90 10:07:32 EDT From: marra@jargon.whoi.edu (Marty Marra) Subject: Array Technologies Color Scanner Does anyone have experience working with an Array Technologies Color Scanner? Ideally I'd like to control their "image server" from my Sun via GPIB. Any general info about these scanners would also be greatly appreciated. Thanks. /\/\ /\/\ Marty Marra, Woods Hole Oceanographic Institution (WHOI DSL) / \ / \ Woods Hole, MA 02543 "marra@jargon.whoi.edu" (508)457-2000x3234 ------------------------------ Date: Fri, 1 Jun 90 13:08:02 -0700 From: graham@cs.washington.edu (Stephen Graham) Subject: CVGIP table of contents: Vol. 51, No. 2, August 1990 COMPUTER VISION, GRAPHICS, AND IMAGE PROCESSING . Volume 51, Number 2, August 1990 CONTENTS A. Huertas, W. Cole, and R. Nevatia. Detecting Runways in Complex Airport Scenes, p. 107. Maylor K. Leung and Yee-Hong Yang. Dynamic Strip Algorithm in Curve Fitting, p. 146. Josef Bigun. A Structure Feature for Some Image Processing Applications Based on Spiral Functions, p. 166. Lawrence O'Gorman. k x k Thinning, p. 195. ANNOUNCEMENTS, p. 216. ABSTRACTS OF PAPERS ACCEPTED FOR PUBLICATION, p. 217. ------------------------------ Date: Fri, 08 Jun 90 15:36:42 +0200 From: ECEM6 Subject: ECEM6 1991 Eye-Movements Conference, First Call Organization: 6th European Conference on Eye Movements 6th European Conference on Eye Movements 15 - 18 september 1991 Leuven, Belgium First Announcement & Call for Papers AIM This is the sixth meeting of the European Scientists actively involved in eye movement research and is the successor to the first meeting held in Bern (Switzerland) in 1981, an initiative of the European Group for Eye Movement Research (for more information on the Group: R. Groner, Laupenstrasse 4, CH-3008 Bern, Switzerland). The aim of the Conference is to promote the wider exchange of information concerning eye movement research in all its diverse fields, and to encourage contact between basic and applied research. The Conference will be of interest to psychologists, educational scientists, neurophysiologists, medical doctors, bioengineers, ergonomists and others interested in visual science. VENUE The Conference will be held at the Department of Psychology, University of Leuven, Belgium, and many presentations will be given in the Michotte Lecture Hall of the Department. CALL FOR PAPERS AND POSTERS If you wish to present a paper or a poster, please send a one- page abstract by January 31, 1991, at the very latest. The selection of posters or papers to be presented will be made by a committee including all preceding organizers of E.C.E.M. (with notifications to the proposers in April 1991). Papers and posters on the following topics are welcome: Neurophysiology of eye movements, oculomotor system, measurement techniques, eye movements in perceptual and cognitive tasks, eye movements and reading, oculomotor disorders, and applied research. Papers integrating sensory sciences and higher-order studies will be favored. Papers and posters should be in English, and the presentation of the paper should not exceed 20 minutes. CONFERENCE PUBLICATIONS If your paper is selected for presentation, you will be asked to resubmit your abstract in the form specified for the publication in the Congress Proceedings. This volume will be made available at the beginning of the Conference. An edited volume of selected papers will be published after the Conference by North-Holland Publishing Company in the new series "Studies in Visual Information Processing" (Series Editors: R. Groner & G. d'Ydewalle). SECOND AND FINAL CALL The second and final call will be forwarded to all those who submitted a paper and poster abstract. If you do not submit an abstract and you want to receive the final call, please give your address in the attached information sheet. The final call will include more details on the programmes as well as information on registration and accommodation. The organizers of the conference will be happy to answer any questions you may have. Our address is given here at the bottom line of the letter. ___ __ / / 6th European Conference on Eye Movements /--- / 15 - 18 september 1991 /___ /____ Leuven, Belgium ___ __ __ l / / l / l l___ Laboratory of Experimental Psychology /--- / l/ l l l Katholieke Unversiteit Leuven /___ / l l___l B-3000 Leuven, Belgium FPAAS91@BLEKUL11.EARN Presidents: Gery d'Ydewalle & Eric De Corte tel: (32)(16) 28 59 65 Organizer: Johan Van Rensbergen fax: (32)(16) 28 60 99 99 ------------------------------ Date: Mon, 4 Jun 90 15:48:52 CDT From: ssmith (Sean Smith) Subject: Evans & Sutherland PS390 FOR SALE!! Evans & Sutherland PS390 (includes): Graphics Control processor with 2 dual-sided Floppies 2 Megabytes Memory Display Processor 19" Color Raster Monitor RS-232C interface PS390 System Firmware, Host Software and License 5 Volume user set Ethernet Interface 1 Megabyte Memory Keyboard w/led display Control Dials w/LED display Tablet 6" x 6" (active area) *****Please contact Sean Smith (713)363-8494 ssmith@bcm.tmc.edu Please pass this message on to interested users. ------------------------------ End of VISION-LIST ********************