Search
Now showing items 261-270 of 625
Logo Turtle Graphics for the Lisp Machine
(MIT Artificial Intelligence Laboratory, 1981-05-05)
This paper is a manual for an implementation of Logo graphics primitives in Lisp on the MIT Lisp Machine. The graphics system provides:
Simple line drawing and erasing using "turtle geometry"
Flexible relative and absolute ...
A Primer for the Act-1 Language
(MIT Artificial Intelligence Laboratory, 1981-06)
This document is intended to describe the current design for computer programming language, Act-1. It describes the Actor computational model, which Act-1 was designed to support. A perspective is provided from which to ...
The Structures of Everyday Life
(MIT Artificial Intelligence Laboratory, 1985-02)
This note descends from a talk I gave at the AI Lab's Revolving Seminar series in November 1984. I offer it as an informal introduction to some work I've been doing over the last year on common sense reasoning. Four themes ...
Exceptional Situations in Lisp
(MIT Artificial Intelligence Laboratory, 1985-02)
Frequently, it is convenient to describe a program in terms of the normal situations in which it will be used, even if such a description does not describe the its complete behavior in all circumstances. This paper surveys ...
Obviously Synchronizable Series Expressions: Part I: User's Manual for the OSS Macro Package
(1987-10-01)
The benefits of programming in a functional style are well known. In particular, algorithms that are expressed as compositions of functions operating on series/vectors/streams of data elements are much easier to ...
Self Calibration of Motion and Stereo Vision for Mobile RobotsNavigation
(1987-08-01)
We report on experiments with a mobile robot using one vision process (forward motion vision) to calibrate another (stereo vision) without resorting to any external units of measurement. Both are calibrated to a velocity ...
A Fully Abstract Semantics for Event-Based Simulation
(1987-05-01)
This paper shows that, provided circuits contain no zero-delay loops, a tight relationship, full abstraction, exists between a natural event-based operational semantics for circuits and a natural denotational semantics ...
Massively Parallel Implementations of Theories for Apparent Motion
(1987-06-01)
We investigate two ways of solving the correspondence problem for motion using the assumptions of minimal mapping and rigidity. Massively parallel analog networks are designed to implement these theories. Their ...
Multigrid Relaxation Methods and the Analysis of Lightness, Shading and Flow
(1984-10-01)
Image analysis problems, posed mathematically as variational principles or as partial differential equations, are amenable to numerical solution by relaxation algorithms that are local, iterative, and often parallel. ...
Color Vision: Representing Material Categories
(1984-05-01)
We argue that one of the early goals of color vision is to distinguish one kind of material from another. Accordingly, we show that when a pair of image regions is such that one region has greater intensity at one wavelength ...