Vision-List-Request@ADS.COM (Vision-List moderator Phil Kahn) (04/24/91)
VISION-LIST Digest Tue Apr 23 11:47:36 PDT 91 Volume 10 : Issue 19 - Send submissions to Vision-List@ADS.COM - Send requests for list membership to Vision-List-Request@ADS.COM - Access Vision List Archives via anonymous ftp to ADS.COM Today's Topics: Realtime stereo machine? Looking for information on facial expression analysis Range Data + Model Sequence of calibrated motion images Feature Recognition from B-Rep or CSG Solid Object Models Request for info about imaging equip Re: Image Compression algorithms 3D Image-Model Matching Looking for recent literature on vision systems CFP: Biomedical Image Processing III and 3-D Microscopy Industrial Vision Metrology Conference ---------------------------------------------------------------------- Date: 23 Apr 91 16:28:51 GMT From: tnaka@ius3.ius.cs.cmu.edu (Tomoharu Nakahara) Organization: Carnegie-Mellon University, CS/RI Subject: Realtime stereo machine? Does anyone know the high-performance, practical, realtime stereo system which uses only cameras? And I want to know the processing time and the range resolution of the system. Thanks in advance. Tomoharu Nakahara Carnegie-Mellon University e.mail:tnaka@ius3.ius.cs.cmu.edu ------------------------------ Date: Mon, 22 Apr 91 23:59:47 EDT From: Rich Miner <miner@ulowell.ulowell.edu> Subject: Looking for information on facial expression analysis I am interested in information on facial pattern recognition, (ie smile, smirk, ...). If you have any pointers to papers or work in this are please drop me a note, I can repost of there is interest. Richard A. Miner miner@ulowell.edu Research Manager University of Lowell (508)934-2630 Center for Productivity Enhancement ------------------------------ Date: Sat, 20 Apr 91 03:47:23 GMT From: schoi@rodan.acs.syr.edu Subject: Range Data + Model Organization: Syracuse University, Syracuse, NY Several people here at Syracuse University under the direction of Professor Minsoo Suk are currently involved with 3-D object recognition. Are there anybody who has a range database suitable for object recognition research ( i.e. range data of one or more objects of various type along with their "model" to be matched), or knows someone who might have such a database? We will be grateful of your information. ------------------------------ From: taalebi@ai.mit.edu (Ali Taalebi) Date: Thu, 18 Apr 91 00:11:34 edt Subject: Sequence of calibrated motion images In order to test a few motion vision algorithms, I am looking for sequences of CALIBRATED motion images (calibrated focal lenghth and principal point.) Any reference to any possible source will be appreciated. [ This request for data requires a calibrated camera. I would very much like to add *calibrated* camera data to the Vision List Archive. Please contact me if you can provide such data at vision-list-request@ads.com . phil... ] Thanks. __ _ Ali Taalebi / ) // MIT AI Lab. /- -/ // o Room NE43-753 / /_</_<_ (617) 253-8005 ali@ai.mit.edu ------------------------------ Date: 19 Apr 91 23:27:43 GMT From: "Michael G Koopman" <mgkst1@unix.cis.pitt.edu> Organization: University of Pittsburgh Subject: Feature Recognition from B-Rep or CSG Solid Object Models Keywords: Feature recognition, Solid Models, CSG, B-Rep I am interested in the latest references regarding attempts to define, classify and recognize three-dimensional solid features. I am not interested in image analysis and should not need to be concerned about permuted images, besides isomerism. The problem I wish to address is the classification of solid objects for which a boundary representation, or preferably a constructive solids geometry representation exists. I am aware of the work by K. Spies (1957 Ph.D. Thesis, Technical University Hannover), primarily through the work of Taylan Altan and other principals at Battelle. The concept of 'shape groups' is then one avenue in which I have interest. I am looking for algorithms for the determination of the types of descriptions of solids which people can determine. For example, long and slender, fat and short, long and wide, thin and twisted come to mind as types of classifications (albeit with no apparent formalism in design). Of importance, the application of scaling techniques to reduce the number features (primitives?) in the description without losing the overall shape and the major characteristics of a solid. One of the types of results would be identification of an axisymmetric, or nearly so, solid or solid segment. Also, the determination of local features of a solid is of interest. An article by Hiroshi Sakurai and David C. Gossard (MIT), Recognizing Shape Features in Solid Models, IEEE Computer Graphics and Applications, Sept. 1990 conveys the meaning of what I have identified as "local features" better than I am able. In this case, a combination of facts from a B-rep graph (e.g. solid angles, adjacency) is graphed and such graphs matched to known features. (I have done grave injustice to this work, my apologies). A type of result to which this leads is identification of such features as through holes or sharp edges. Cuningham and Dixon at the University of Amherst and Mark Henderson of the University of Arizona have made progress in these areas. I am interested in any references, comments, "unbending laws of nature", suggestions, etc. which you are willing to share. I will attempt to create a compendium of these ideas for posting to the net. With all of the good, free ideas I expect to collect this compendium of commentaries should need to be compressed and 'ftp'-ed from a server :-) With Thanks, Mike Koopman (<mgkst1@unix.cis.pitt.edu>) MTI 1450 Scalp Avenue Johnstown, PA 15904 USA ------------------------------ Date: Thu, 18 Apr 91 12:36:09 CDT From: reich@ser.unl.edu (Stephen E. Reichenbach) Subject: request for info about imaging equip Two requests for information: 1) We are set to equip an imaging lab with (e.g. Sun) workstations and would appreciate any comments about others' experiences (interface, performance, cost, problems) or suggestions. The equipment will include: a) Camera, analog or digital output. We will also need a frame grabber if we get analog (video) output. b) Hardcopy, probably both a film recorder and printer. Tenatively, we are leaning toward a color dye sublimation printer, but are not very knowledgable about the many imaging printer technologies. We must have 256 gray levels and would like 16.7M colors. 2) Matrix sells film writers for MACs with SCSI interface. They provide a driver for the MAC, but not for other systems. Has anyone else written a SCSI driver for Matrix cameras that they could provide us? If not, would writing one be difficult for a non-systems person? I will provide a summary of the responses to anyone who requests one. Stephen E. Reichenbach Computer Science and Engineering Dept. University of Nebraska--Lincoln Lincoln, NE 68588-0115 Ferguson Hall 304 (402) 472-5007 Fax: (402) 472-7767 email: reich@fergvax.unl.edu ------------------------------ Date: Sat, 20 Apr 91 22:06:13 -0500 From: Steve Eddins <eddins@uicbert.eecs.uic.edu> Subject: Re: Image Compression algorithms Richard Hubert writes: >Take a look at the JPEG ISO imaging compression standard that will be >completed by this fall. ... >It uses frequency domain transformations (Adaptive Discrete Cosing Transform) >to reach lossless compression levels of at least 20:1 and decimated >compression of 40:1. If your looking for something simpler, there are lots >of public domain tools to reach a compression of 2:1 or so. Curiously enough, I just received a copy of the 8/14/90 draft standard today. I'm not sure exactly what he means by "decimated compression," but I believe the statements regarding lossless compression are inaccurate on two points: * DPCM, not ADCT, is used for lossless coding. * A lossless compression ratio figure of 20:1 is too high. Here are a few lines from Section 5 (Overview) of the draft standard: "Two classes of compression algorithms are defined, a set based on the two-dimensional discrete cosine transform (DCT) and a set based on spatial prediction techniques. The DCT based algorithms are intended to give output image quality relative to the source images ranging from very good to excellent (visually indistinguishable for typical viewing conditions). The spatial algorithms use differential pulse code modulation (DPCM) techniques, and are intended primarily for lossless coding. ... The compression achieved with these algorithms is dependent on the characteristics of the images being compressed. For the color images of natural scenes which have been used for testing and development of the algorithms, recognizable images are obtained at about 0.15 bits per pixel and useful images are obtained at about 0.25 bits per pixel. At 0.75 bits per pixel are typically of very good quality, and at about 1.5 bits per pixel or less the images are essentially indistinguishable from the original source images. Lossless coding is obtained at about 2:1 compression for these test images. All of these ratios are based on tests of 4:2:2 CCIR 601 format Y,Cb,Cr color images with an average of 16 bits per pixel." Steve Eddins eddins@uicbert.eecs.uic.edu (312) 996-5771 FAX: (312) 413-0024 University of Illinois at Chicago, EECS Dept., M/C 154, 1120 SEO Bldg, Box 4348, Chicago, IL 60680 ------------------------------ Date: 19 Apr 91 16:07:20 GMT From: perry@beno.CSS.GOV (John Perry) Subject: 3D Image-Model Matching Keywords: image processing, computer vision, 2D/3D vision I am interested in obtaining some references on papers, etc. on matching a 3D depth map obtained from stereo images with a 3D model (CAD, etc.) in order to obtain an estimate of the deformation of a 3D object. Any information is greatly appreciated. Thanks, - John ------------------------------ Date: Sat, 20 Apr 91 14:40:15 GMT From: cl7544@csc.albany.edu (Cole G. Libby) Subject: Looking for recent literature on vision systems Organization: University of NY at Albany I'm seeking references to recent literature on visions systems. Specifically, I'm interested in the major problems computer vision presents and a variety of proposed solutions to those problems. Can any one e-mail me references to the important works in the field? Cole Libby cl7544@leah.albany.edu ------------------------------ Date: Thu, 18 Apr 91 12:18:19 EDT From: Dr Dmitry Goldgof <goldgof@gasparilla.csee.usf.edu> Subject: CFP: BIOMEDICAL IMAGE PROCESSING III AND 3-D MICROSCOPY CALL FOR PAPERS BIOMEDICAL IMAGE PROCESSING III AND 3-D MICROSCOPY Part of 1992 SPIE/SPSE Symposium on Electronic Imaging February 9-14, 1992, San Jose, California The large variety of imaging modalities for the exploration of objects of biomedical interest has led to the necessity for solving many problems related to the specific characteristics of the radiation and sensing apparatus used. Acquired biomedical images typically suffer from degradation related to the physical limitations of the imaging device. These degradations serve to complicate the generic goals of analysis and interpretation. This conference is devoted to the presentation of new techniques directed towards the improved interpretation (interactive or automated) of biomedical images obtained from practical systems. Papers are colicited which detail methods for reconstructing images from partial information, for correcting image defects, or for effectively extracting/analyzing/interpreting practical images of biomedical interest. This conference will also explore the rapidly developing field of three-dimensional microscopy. Consideration will be given to the characteristics of the overall system design, including the illuminating source, imaging optics and electronics sensors as well as to digital methods for producing and displaying the resulting 3-D reconstruction. Recent innovations in microscopy are having a large impact especially in the biological and medical fields. Because these microscopes are now fully integral systems incorporating both optical and electronic elements, it is hoped that the broad range of relevant topics being presented at this symposium will serve to encourage interactions among instrumentation engineers, computer image analysts and biological and medical researchers. Papers are invited in the following and related areas: Biomedical Image Processing - Image reconstruction - Image restoration and enhancement - Feature enhancement and extraction in biomedical images - Biomedical image analysis and interpretation - Multi-dimensional biomedical image processing - Motion analysis in biomedical images 3-Dimensional Microscopy - Confocal Microscopy - 3-D and time-resolved image acquisition systems - Hybrid optical/electronic image processing systems - 3-D image processing and analysis - 3-D image reconstruction - Spatio-temporal reconstruction of living cells and tissues - Image visualization techniques for 3-D microscopy systems Submissions: Please send 4 copies of a 200-word abstract and a brief biography by July 15, 1991 to: SPIE/SPSE Technical Program Committee: Electronic Imaging: Science and Technology 1992 P.O. Box 10, Bellingham, WA 98227-0010 USA Shipping Address: 1000 20th St., Bellingham, WA 98225 Telephone: 206/676-3290 (Pacific Time); Telex 46-7053 Telefax: 206/647-1445; OPTO-LINK 206/733-2998 Please include the author(s) name(s), company name, complete address and telephone/telex/telefax numbers (principal author first), and clearly designate for which conference within symposium the abstract is intended. For more information contact SPIE/SPSE or Conference Chairs below. Important dates: Applicants will be notified of acceptance by mid-November. Camera-ready abstact is due December 2, 1991 Manuscript is due January 13, 1992 Conference Chairs: Dr. Carol J. Cogswell Physical Optics Department The University of Sydney NSW Australia 2006 Dr. Dmitry B. Goldgof Department of Computer Science and Engineering University of South Florida Tampa, Florida 33620-5350 Internet: goldgof@sol.csee.usf.edu Dr. Raj Acharya Department of Electrical and Computer Engineering State University of New York at Buffalo Buffalo, New York 14260 Internet: acharya@eng.buffalo.edu ------------------------------ Date: Tue, 23 Apr 91 10:30 EST From: ELHAKIM%NRCCIT.NRC.CA@VM.NRC.CA Subject: Industrial Vision Metrology Conference Final Announcement INTERNATIONAL CONFERENCE ON INDUSTRIAL VISION METROLOGY Location: The Canadian Institute for Industrial Technology 435 Ellice Ave., Winnipeg, Manitoba, Canada Date: July 11-12, 1991 Organized by: -International Society for Photogrammetry & Remote Sensing Commission V: Close-Range Photogrammetry and Machine Vision WG V/1: Digital and Real-time Close-range Photogrammetry Systems -National Research Council of Canada Proceeding published by: SPIE- The International Society for Optical Engineering Cooperating organizations: SPIE ASPRS- American Society for Photogrammetry & Remote Sensing Focusing on: Industrial applications of metric vision techniques Demonstrations of several systems will be given. Who should attend and why: Machine vision researchers and potential users of vision systems for industrial metrology applications. The conference will encourage discussions and debates of issues by allowing longer discussion times. Papers are encouraged to include as much details as possible (up to 20 pages). Technical Program: TS1: Gauging with Machine Vision: -A.Novini (USA),"Fundamentals of on-line gauging with machine vision" -K.Wong,et al (USA),"3-D gauging with stereo computer vision" -D.Fritsch (Germany),"Reconstruction of a sub-reflector by digital photogrammetric methods" TS2: Accuracy Analysis: -P.Gustafson (USA),"An accuracy/repeatability test for a video photogrammetric measurement" -A.Gruen,et al (Switzerland),"High accuracy edge matching with an extension of the MPGC-matching algorithm" -G.Derkson,et al (Canada),"Improved accuracy by camera movement" TS3: Surface/Object Reconstruction: -H.G.Maas (Switzerland),"Automated surface reconstruction with structured light" -A.Schenk (USA),"Reconstructing visible surface from stereo" -R.Daher,et al (Canada),"Implementation of a 3-D stereo vision system for the production of customized orthotic accessories" TS4: Camera and System Calibration -E.Bruzzone,et al (Italy),"Calibration of a CCD camera on a hybrid coordinate measuring machine for industrial metrology" -S.MacLean,et al (Canada),"Calibration of the space vision system SVS" -R.Lenz (Germany),"Geometrical and radiometrical signal transfer characteristics of a color CCD camera with 21 million pixels" TS5: System Applications I: -H.Beyer (Switzerland),"Automated dimensional inspection of cars in crash tests with digital photogrammetry" -D.Chapman,et al (UK),"A remote measuring system for the mapping of hazardous environments (HAZMAP)" -A.Hassan,et al (Malaysia),"Deformation study using photogrammetric and multispectral analysis methods" -Z.Delecki,et al (Canada),"A nonoptical noncoherent imaging in industrial testing" TS6: System Applications II: -S.Godber,et al (UK),"Three-dimensional machine vision using line-scan sensors" -M.Chapman,et al (Canada),"Storing and managing three-dimensional digital medical image information" -D.Zawieska,et al (Poland),"Moire technique in medical diagnosis and control of rehabilitation" -S.EL-Hakim (Canada),"Performance of a stereo vision dimensional measuring system" SEND REGISTRATION FORM TO: Industrial Vision Metrology Conference c/o National Research Council 435 Ellice Avenue Winnipeg, Manitoba, Canada R3B 1Y6 tel:(204) 983-5056 / Fax:(204) 983-3154 email:elhakim@nrccit.nrc.ca or elhakim@ciitip.ciit.nrc.ca ------------------------------------------------------------------------- Name:............................................................ Organization:.................................................... Title:........................................................... Address:......................................................... ................................................................. Tel:............................ Fax:....................... Hotel: ....-yes ....-no room: ....-single ....-double dates:.................................... Payment: .... - $180. (Canadian) enclosed, (student $50), or .... - pay upon arrival Fees include: Proceedings, reception, banquet, lunches and coffee. Student include proceedings, lunches and coffee only. ------------------------------ End of VISION-LIST digest 10.19 ************************