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VISION-LIST Digest Volume 12 Issue 60
VISION-LIST Digest Wed Dec 29 14:09:50 PDT 93 Volume 12 : Issue 60
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Today's Topics:
Moments from boundary
Solutions to pNp problem
question about scaling 2-d binary image
projective area-invariants(image)
INFO REQUEST on readability of printed text.
image acquisition boards
job opportunity
Columbia seeks junior, senior vis/rob profs
----------------------------------------------------------------------
Date: Wed, 22 Dec 93 09:39:38 GMT
From: Bill Denton (AD) <bill@sees.bangor.ac.uk>
Subject: Moments from boundary
Another paper which may be of interest is :
@ARTICLE{Medalia70
AUTHOR = "A. I. Medalia",
TITLE = "Dynamic Shape Factors of Particles"
JOURNAL = Powder Technology
YEAR = 1970/71
number = "4"
pages = "117--138"
}
Bill Denton
SEECS
University of Wales, Bangor
------------------------------
Date: 22 Dec 1993 13:09:07 -0600
From: lak@minuet.siue.edu (Lance Kendrick)
Organization: UTexas Mail-to-News Gateway
Subject: Solutions to pNp problem
I'm searching for papers that describe the implementation of or for
actual implementations of (ie, code) solutions to the "perspective
n-point problem" (pnp problem). The essential process of this problem
is to determine the position and orientation of a camera with respect
to object(s) in the scene. This problem is aka the exterior camera
calibration problem. Any info is appreciated.
Thanks,
Lance A. Kendrick
Home : 618-288-9607
Work : 618-887-4142
Office : Stealth Technologies, Inc.
101 E. Alton
Marine, IL 62061-0427
e-mail: : lak@minuet.siue.edu
------------------------------
Date: 22 Dec 1993 17:02:09 -0800
From: Pervez Mohta <pmohta@clyde.ICS.UCI.EDU>
Organization: UC Irvine, Department of ICS
Subject: question about scaling 2-d binary image
Keywords: binary image, 2-D, scaling, height/width ratio.
Hi,
I had a question about sccaling a binary image. Heres the scenario:
I have a 2-dimensional binary image represented as a (MxN) matrix with
values of '1' indicating presence of line content, and '0' indicating
absence of line content. (The image may be stored in a file in ascii
format with ascii '1's and '0's rather than as a strict binary file.
The idea is to scale this image up or down to a size (PxQ) matrix,
with no restrictions on P and Q. (i.e. P can be <, =, or > than M,
and similarly Q and N).
What is the best way of achieving this scaling WITHOUT loosing information
content and height/width ratio ,etc.. A rough analogy to the problem could
be that I have a 4x8 photo and I want to blow it up to a size 9x11 or
shrink it to a size 3x2, and still retain as much information as possible.
Well, any help in the form of references, suggestions, pros and cons of
various methods, etc.. would be highly welcome. I would appreciate
information at the algorithmic level rather than information about
commercial packages to do the job.
You can post the replies to the net or to my email address at:
pmohta@ics.uci.edu
Thanks. If there is interest, I will summarize on the net. (Although
I suspect this might be a trivial problem for you hard-core image
processing guys).
-- pervez mohta.
------------------------------
Date: 23 Dec 1993 02:19:49 GMT
From: eng00888@leonis.nus.sg (Yong Tet Kuen)
Organization: National University of Singapore
Subject: projective area-invariants(image)
I'm a Mechanical Engineering final year student from the National
University of Singapore. Currently I'm working on my project based on the
journal article:
CVGIP : Image Understanding Vol.54, No.1, July, pp. 145-159,1991
Title: Projective Area-Invariants as an Extension of the Cross-Ratio
Authors: Lars Nielsen and Gunnar Sparr
I'm currently using an image system to capture images of
triangles and parallelograms, with further image processing, hopefully I
could prove the results of the article.
There are many doubts which I would like to clarify and anyone
who is currently working in these areas or has previous experience, I
need your invaluable advice.
Some of the doubts are:
1. The results obtained seem to be limited by having shapes which have
three smaller similar shapes within itself.
2. The results seem to work only for fixed length scales, and these fixed
length scales give similar results for different shapes.
And many more...
Urgent reply needed!
------------------------------
Date: 22 Dec 1993 12:52:26 GMT
From: jans@sun1.NoSubdomain.NoDomain (Jan Stap)
Organization: Eindhoven University of Technology, Department of Electrical Engineering
Subject: INFO REQUEST on readability of printed text.
Keywords: readability, legibility, perceptability, visibility
A hello to everyone out there,
I am interested in literature references to articles and books on the
subject of readability of text, printed in ink on components like IC
housings, cassette tapes and other products. More precisely, I would
like to now which factors influence the human readability of text and
what the influence of these factors is. Since I am new to the Usenet
news community, I am also interested in other news groups dealing with
related subjects. Can any one of you experienced news readers/submitters
help me out on this?
Much thanks in advance,
Jan Stap
------------------------------
Date: 22 Dec 93 19:45:05 GMT
From: dforan@pilot.njin.net (David Foran)
Organization: Rutgers Univ., New Brunswick, N.J.
Subject: image acquisition boards
Keywords: images, boards, sgi, sun, sbus
Hello,
I am interested in purchasing two image acquisition boards;
one for an SGI and one for a Sun Workstation. The Sun
workstation has an S-bus. Each board should allow for 24bit
color, and 4 512x512 subimages.
Any recommendations would be gladly received.
Thanks in advance,
David Foran
djf@mirage.umdnj.edu
------------------------------
Date: Wed, 22 Dec 93 14:42:49 PST
From: lhm@robotics.Jpl.Nasa.Gov (Larry Matthies)
Subject: job opportunity
The Robotic Systems and Advanced Computer Technology Section of the
Jet Propulsion Laboratory (JPL) in Pasadena, California, is seeking
research staff in computer vision. Responsibilities will include
conducting research and development of prototype computer vision
capabilities for robotic ground vehicles, telerobotic space
manipulators, and other robotics projects. Individuals will initially
contribute to existing projects, but will be expected to participate
actively in new project development. Candidates must have a Ph.D. in
electrical engineering, computer science, applied physics, or a
related field, with thesis work or extensive experience in computer
vision. Particular research areas of interest include visual shape
and motion estimation, visual tracking, pose estimation, and object
recognition. Desirable skills include facility with stochastic
modeling, signal theory, computer graphics, optics, and "C" language
programming under Unix. Experience with real-time operating systems
and image processing hardware, robotic path planning and control, and
electronics design is also valuable. Individuals must be physically
able to travel and conduct field experiments with outdoor robotic
vehicles. Research facilities at JPL include Sparc-10 and Silicon
Graphics workstations, indoor and outdoor robotic vehicles, and
several six to eight-DOF manipulators. In addition to the areas
mentioned above, the Robotic Systems and Advanced Computer Technology
Section conducts research in neural networks, nonlinear systems,
optical networks, and advanced computer systems. It has ties with
other JPL Sections that conduct research in Artificial Intelligence,
VLSI, remote sensing, and advanced spacecraft control, as well as ties
with Caltech and other major research universities in southern
California and elsewhere.
Positions are available at entry and intermediate levels. Compensation will
be commensurate with experience. Interested individuals should reply to:
Larry Matthies
Mail stop 107-102
Jet Propulsion Laboratory
4800 Oak Grove Drive
Pasadena, CA 91109
lhm@robotics.jpl.nasa.gov
818-354-3722
JPL, a division of the California Institute of Technology, is an equal
opportunity employer.
------------------------------
Date: Wed, 22 Dec 93 9:46:49 EST
From: "John R. Kender" <jrk@cs.columbia.edu>
Subject: Columbia seeks junior, senior vis/rob profs
Columbia University has both a junior and a senior position open to
researchers in computer vision and/or robotics. The senior position
requires serving as chair. The restriction mentioned in the ad is
meant to refer to mainstream AI, and does not apply to vision or
robotics (which were explicitly ruled out in last year's ad).
COLUMBIA UNIVERSITY
DEPARTMENT OF COMPUTER SCIENCE
We are anticipating at least one tenure track opening. We invite
applications from exceptional candidates at all ranks and in all areas
except artificial intelligence, but we are particularly interested in
areas that complement current departmental research interests. In
addition, we have interest in the areas of applied databases and
programming languages.
Our department of nineteen tenure-track faculty and two lecturers
emphasizes research, and attracts excellent Ph.D. students, virtually
all of whom are fully supported. Departmental facilities include
numerous Sun 4 servers, Sun, HP, Digital, IBM, and NeXT workstations,
plus state-of-the-art experimental equipment. The department is in
the second year of an NSF CISE infrastructure grant and we have
recently purchased an HP parallel cluster. We are within an hour's
drive of the research laboratories of AT&T, Bellcore, IBM, Matsushita,
NEC, NYNEX, Philips, Siemens, and other leading industrial companies.
Columbia University is one of the leading research universities
in the United States, and New York City is one of the cultural,
financial, and communications capitals of the world. Columbia's
enclosed campus of tree-lined walks is located in Morningside Heights
on the Upper West Side. The department has its own building plus
additional space and facilities in the new interdisciplinary Schapiro
Center for Engineering and Physical Science Research. University rent
controlled housing and parking are available.
Candidates for assistant professor should exhibit exceptional
research promise, while those seeking a more senior position should
have an outstanding record of research achievement. Interest and
ability in teaching undergraduates and graduates is necessary. Please
submit a summary of research interests, resume, email address, and the
names of at least three references to: Prof. Kathleen McKeown, Faculty
Search Chairperson, Department of Computer Science, 450 Computer
Science Building, Columbia University, New York, New York 10027
(recruiting@cs.columbia.edu).
Columbia University is an Equal Opportunity/Affirmative Action
Employer. We encourage applications from women and minorities.
COLUMBIA UNIVERSITY
CHAIRPERSON
DEPARTMENT OF COMPUTER SCIENCE
The Computer Science Department is considering hiring an outside
person to serve as Chair of the Department and Professor. Our
department of nineteen tenure-track faculty and two lecturers
emphasizes research, and has strengths in the areas of theoretical
computer science, vision/robotics, artificial intelligence, user
interfaces, software, and hardware. Nearly all of our eligible
professors have been awarded PYIs, NYIs, or ONR YIs, and two have been
awarded Packard Fellowships. We attract excellent Ph.D. students,
virtually all of whom are fully supported. Current undergraduate
majors number about 100, M.S. students about 100, and Ph.D. students
about 70. Departmental facilities include numerous Sparc servers,
Sun, HP, Digital, IBM, and NeXT workstations, plus state-of-the-art
experimental equipment for vision/robotics and for mobile computing.
The department is in the third year of an NSF CISE infrastructure
grant and we have recently purchased an HP parallel cluster. We are
within an hour's drive of the research laboratories of AT&T, Bellcore,
IBM, Matsushita, NEC, NYNEX, Philips, Siemens, and other leading
companies.
Columbia University is one of the leading research universities
in the United States, and New York City is one of the cultural,
financial, and communications capitals of the world. Columbia's
enclosed campus of tree-lined walks is located in Morningside Heights
on the Upper West Side. The department has its own building plus
additional space and facilities in the new interdisciplinary Schapiro
Center for Engineering and Physical Science Research. University
subsidized housing and parking are available.
Candidates should have a demonstrated record of outstanding
research with broad-based funding and be excellent teachers. Evidence
of scientific and organizational leadership, educational innovation,
and administrative effectiveness is expected. Please submit a
curriculum vita, email address, and the names of at least three
references to: Chair Search Committee, Department of Computer Science,
450 Computer Science Building, Columbia University, New York, New York
10027 (recruiting@cs.columbia.edu).
Columbia University is an Equal Opportunity/Affirmative Action
Employer. We encourage applications from women and minorities.
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End of VISION-LIST digest 12.60
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