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OBVIUS: Object-Based Vision and Image Understanding System

OBVIUS (Object-Based Vision and Image Understanding System) is an image-processing system based on Common Lisp and CLOS (Common Lisp Object System). The system provides a flexible interactive user interface for working with images, image-sequences, and other pictorially displayable objects. By using Lisp as its primary language, the system is able to take advantage of the interpretive lisp environment (the ``listener''), object-oriented programming, and the extensibility provided by incremental compilation. The top-level of OBVIUS is implemented in Common Lisp, thus providing an interpreted, object-oriented programming environment. The low-level floating point operations are implemented in C for efficiency. A graphical user interface, based on menus and dialog boxes is also provided, in addition to the Lisp interpreter (listener). In the typical mode of interaction, the user types an expression to the lisp listener (or enters a command in a dialog box) and it returns a result. A picture of that result will then be automatically displayed in a window. Each window contains a circular stack of pictures. The user can cycle through this stack using mouse clicks with certain shift (``bucky'') key combinations. Commonly used operations such as histogram and zoom are also provided via mouse clicks. The system provides a library of low-level image processing routines, including - arithmetic operations (add, multiply, lookup-table point operations, etc) - image statistics (mean, variance, kurtosis, maximum, histograms etc) - convolutions, Fourier transforms, Hilbert transforms - geometric operations (crop, slice, rotate, flip-x, etc) - comparisons (greater-than, etc) - synthetic image generation - matrix operations OBVIUS also provides postscript output of pictures. Writing new operations in OBVIUS is relatively simple, and it is straightforward to add new viewable and picture types. OBVIUS uses a homebrew interface to X11 (i.e., it does not use clx or clue). However, they eventually hope to port Obvius to a CLX/CLUE platform.
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Version: 3.0.3 (30-MAY-94) Requires: Common Lisp, X11 Ports: Runs in Lucid 4.0 on Sun and SGI workstations. For the Sun implementation, it also requires the LispView interface to OpenWindows/X, which is available free of charge on the X11 distribution tape (copy included in this distribution). Copying: Copyright (c) 1994 by the Leland Stanford Junior University. Copyright (c) 1991 by the Massachusetts Institute of Technology. Use, copying, and modification for noncommercial purposes permitted. (See COPYRIGHT file for details.) Please send a mail message to the authors if you are using Obvius, so that they can maintain a list of users (for sending out bug fixes, informing you of new releases, etc.). CD-ROM: Prime Time Freeware for AI, Issue 1-1 Author(s): David Heeger Tel: (415) 723-4048 Eero Simoncelli or Tel: (215) 898-0376 Keywords: Authors!Heeger, Authors!Simoncelli, Computer Vision, OBVIUS, Vision References: Documentation (latex), and a User's Guide with installation instructions are included in the distribution.
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