A. Etemadi, ICSTM, Feb 17th 1993
These directories contain the elements for creating, testing, and running
the Object Recogition Toolkit (ORT). Contact me (address at the end of
this file) if you have any problems.
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INSTALL file contains Installation info.
The Doc/FAQ file contains frequently asked questions and usage info.
The Doc/EXAMPLE file contains an example session
The Doc/PHILOSOPHY file describes the philosophy behind the design
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Object Recognition Toolkit (ORT) Version 2.3
============================================
ORT is a collection of pixel grouping S/W in C aimed for use on Unix
platforms (Sun4, Decstation, Iris, X86 under Linux). Currently the
starting point for ORT is an edge detected image. The S/W is in the
form of filters and includes a displayer for use on COLOUR workstations
under X11R4/5. All the S/W comes with the GNU general public licence.
Also included are LaTeX copies of papers on some of the S/W (FEX, LPEG).
Basically ORT allows you to create progressively more complex groupings
of a set of edge pixels [lines/arcs -> parallel/collinear/junctions ->
triplets/corners/polygons]. Changes from previous versions are:
Version 2.1:
1. All programs are now default driven
2. PGM format as standard with option for raw images
3. Added new options to LPEG and IPEG
4. IPEG is fully general and very much faster
5. LPEG now has option to consider pairs of collinear lines as real lines
Version 2.3:
1. Changed names of programs and converted to lowercase characters
2. Added support for rectangular images
3. Fixed problem with HUGE value being too big for some compilers (eg
gcc on 386 and 486PCs.)
4. Now all programs (except ort2image) may be chained using Unix pipes
5. The ID number assigned to Lines and Circular arcs is constant. Before I
used to change ID numbers when grouping the lines. This caused some
people problems.
6. All programs are faster (specially ipeg).
7. Fixed problem (actually a C bug I think :) in ipeg which made it give
segmentation fault for no reason. This was due the use of bcopy.
Now only if you set the quality factor very low (eg 0.3) it usually
requires too much memory for average machines and crashes. Since I don't
know how to check for available memory on-the-fly I left this bug alone.
8. Restructured the directories
The features defined within ORT represent the complete set required to
recognize any polyhedral object (view point independently) starting from edge
information. Available later this year will be an Edge detection module,
and hopefully also a generalised curve grouping system.
Code Description
-------------- ----------------------------------------------------------
Liste List handling library in C by Jean-Paul Schmidt formerly
of University of Surrey, UK. [Version 1.2]
chainpix Pixel Chainning code by Geoff A.W. West and Paul L. Rosin
of Curtin University, Australia [Version 1.2]
fex Segments chained pixel lists produced by chainpix
into straight-line segments and circular arcs. [Version 1.7]
lpeg Low-level straight-line grouping [Version 1.9]. Groups
straight-line segments produced by fex into:
Parallel overlapping Parallel non-overlapping
Collinear V,L,T, and Lambda Junctions
ipeg Intermediate-level grouping [Version 2.1]. Groups sets
produced by lpeg into:
Triplets (barends, Z)
Corners (3 lines sharing a junction point)
Polygons
DisplayGrps X11R4/5 viewer for the above groupings/segments by
Jean-Paul Schmidt and Ata Etemadi [Version 1.2]
I would appreciate it if people who obtain the S/W drop me a line. All
contributions/comments to the distribution are most welcome. If you have
any problems I'll be glad to help.
regards
Ata <(|)>.
| Mail Dr Ata Etemadi, Blackett Laboratory, |
| Space and Atmospheric Physics Group, |
| Imperial College of Science, Technology, and Medicine, |
| Prince Consort Road, London SW7 2BZ, ENGLAND |
| Phone +44 (0)71 589 5111 Ext 6751 or 6752 (secretary/answer phone) |
| Fax +44 (0)71 823 8250 Attn. Dr Ata Etemadi, |
| Telex 929484 (IMPCOL G) Attn. Dr Ata Etemadi, |
| Janet atae@uk.ac.ic.ph.spva or ata@uk.ac.ucl.mssl.c |
| Internet/Arpanet/Earn/Bitnet atae@spva.ph.ic.ac.uk or ata@c.mssl.ucl.ac.uk |
| Span SPVA::atae or MSSLC:atae |
| UUCP/Usenet atae%spva.ph.ic@nsfnet-relay.ac.uk |
