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Browsing AI Memos (1959 - 2004) by Title

Research and Teaching Output of the MIT Community

Browsing AI Memos (1959 - 2004) by Title

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  • Direct Passive Navigation: Analytical Solution for Planes 
    Negahdaripour, Shahriar (1985-08-01)
    In this paper, we derive a closed form solution for recovering the motion of an observer relative to a planar surface directly from image brightness derivatives. We do not compute the optical flow as an intermediate ...
  • Direct Passive Navigation: Analytical Solution for Quadratic Patches 
    Negahdaripour, Shahriar; Yuille, Alan (1986-03-01)
    In this paper, we solve the problem of recovering the motion of an observer relative to a surface which can be locally approximated by a quadratic patch directly from image brightness values. We do not compute the ...
  • Direct Recovery of Motion and Shape in the General Case by Fixation 
    Taalebinezhaad, M. Ali (1990-03-01)
    This work introduces a direct method called FIXATION for solving the general motion vision problem. This Fixation method results in a constraint equation between translational and rotational velocities that in combination ...
  • Discovering Good Regions for Teitelman's Character Recognition Scheme 
    Winston, Patrick (1969-05-01)
    Warren Teitelman presented a novel scheme for real time character recognition in his master's thesis submitted in June of 1963. A rectangle, in which a character is to be drawn, is divided into two parts, one shaded ...
  • Discovery Systems 
    Haase, Kenneth W., Jr. (1986-04-01)
    Cyrano is a thoughtful reimplementation of Lenat's controversial Eurisko program, designed to perform automated discovery and concept formation in a variety of technical fields. The 'thought' in the reimplementation ...
  • Disparity Gradients and Depth Scaling 
    Bulthoff, Henrich; Fahle, Manfred (1989-09-01)
    The binocular perception of shape and depth relations between objects can change considerably if the viewing direction is changed only by a small angle. We explored this effect psychophysically and found a strong depth ...
  • Display Functions in LISP 
    Binford, Thomas O. (1970-03-01)
    This note describes a system which compiles various forms of LISP lists and arrays into display commands for the DEC 340 display, and provides supporting functions for scaling, for moving elements in a display, for pot ...
  • Dissociated Dipoles: Image representation via non-local comparisons 
    Balas, Benjamin J.; Sinha, Pawan (2003-08-13)
    A fundamental question in visual neuroscience is how to represent image structure. The most common representational schemes rely on differential operators that compare adjacent image regions. While well-suited to encoding ...
  • Distance Metric Between 3D Models and 3D Images for Recognition and Classification 
    Basri, Ronen; Weinshall, Daphna (1992-07-01)
    Similarity measurements between 3D objects and 2D images are useful for the tasks of object recognition and classification. We distinguish between two types of similarity metrics: metrics computed in image-space (image ...
  • The Dream of a Lifetime: A Lazy Scoping Mechanism 
    Steele, Guy Lewis, Jr.; Sussman, Gerald Jay (1979-11-01)
    We define a "rack", a data abstraction hybrid of a register and a stack. It is used for encapsulating the behavior of the kind of register whose contents may have an extent which requires that it be saved during the ...
  • D-SCRIPT: A Computational Theory of Descriptions 
    Moore, Robert C. (1973-02-01)
    This paper descries D-SCRIPT, a language for representing knowledge in artificial intelligence programs. D-SCRIPT contains a powerful formalism for descriptions, which permits the representation of statements that are ...
  • Dual Coding and the Representation of Letter Strings 
    Rosenberg, Steven T. (1977-07-01)
    Sub-strings derived from four-letter strings (e.g. ABCD) were presented to subjects using a variation on Bransford and Franks' (1971) paradigm. Each strins was in either upper or lower case. Subjects were then tested ...
  • Dynamical Systems and Motion Vision 
    Heel, Joachim (1988-04-01)
    In this paper we show how the theory of dynamical systems can be employed to solve problems in motion vision. In particular we develop algorithms for the recovery of dense depth maps and motion parameters using state ...
  • A Dynamical Systems Model for Language Change 
    Niyogi, Partha; Berwick, Robert (1995-12-01)
    Formalizing linguists' intuitions of language change as a dynamical system, we quantify the time course of language change including sudden vs. gradual changes in languages. We apply the computer model to the historical ...
  • Dynamic Graphics Using Quasi Parallelism 
    Kahn, Kenneth M.; Hewitt, Carl (1978-06-01)
    Dynamic computer graphics is best represented as several processes operating in parallel. Full parallel processing, however, entails much complex mechanism making it difficult to write simple, intuitive programs for ...
  • Dynamic Interactions Between Limb Segments During Planar Arm Movement 
    Hollerbach, John M.; Flash, Tamar (1981-11-01)
    Movement of multiple segment limbs requires generation of appropriate joint torques which include terms arising from dynamic interactions among the moving segments as well as from such external forces as gravity. The ...
  • The Dynamicist's Workbench: I Automatic Preparation of Numerical Experiments 
    Abelson, Harold; Sussman, Gerald Jay (1987-05-01)
    The dynamicist's workbench is a system for automating some of the work of experimental dynamics. We describe a portion of our system that deals with the setting up and execution of numerical simulations. This part of ...
  • Dynamic Model and Control of an Artificial Muscle Based on Contractile Polymers 
    Brock, David L. (1991-11-01)
    A dynamic model and control system of an artificial muscle is presented. The artificial muscle is based on a contractile polymer gel which undergoes abrupt volume changes in response to variations in external conditions. ...
  • Dynamic Scaling of Manipulator Trajectories 
    Hollerbach, John M. (1983-01-01)
    A fundamental time-scaling property of manipulator dynamics has been identified that allows modification of movement speed without complete dynamics recalculation. By exploiting this property, it can be determined ...
  • Dynamics of a Three Degree of Freedom Kinematic Chain 
    Horn, Berthold K.P.; Hirokawa, Ken-Ichi; Vazirani, Vijay (1977-10-01)
    In order to be able to design a control system for high-speed control of mechanical manipulators, it is necessary to understand properly their dynamics. Here we present an analysis of a detailed model of a three-link ...
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