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Motion Field and Optical Flow: Qualitative Properties
(1986-12-01)
In this paper we show that the optical flow, a 2D field that can be associated with the variation of the image brightness pattern, and the 2D motion field, the projection on the image plane of the 3D velocity field of ...
The Analysis of Visual Motion: From Computational Theory to Neuronal Mechanisms
(1986-12-01)
This paper reviews a number of aspects of visual motion analysis in biological systems from a computational perspective. We illustrate the kinds of insights that have been gained through computational studies and how ...
Computations in the Vertebrate Retina: Gain Enhancement, Differentiation and Motion Discrimination
(1986-09-01)
The vertebrate retina, which provides the visual input to the brain and its main interface with the outside world, is a very attractive model system for approaching the question of the information processing role of ...
Regularization Theory and Shape Constraints
(1986-09-01)
Many problems of early vision are ill-posed; to recover unique stable solutions regularization techniques can be used. These techniques lead to meaningful results, provided that solutions belong to suitable compact ...
Boolean Classes
(1986-09-01)
Object-oriented programming languages all involve the notions of class and object. We extend the notion of class so that any Boolean combination of classes is also a class. Boolean classes allow greater precision and ...
Visual Attention in Brains and Computers
(1986-09-01)
Existing computer programs designed to perform visual recognition of objects suffer from a basic weakness: the inability to spotlight regions in the image that potentially correspond to objects of interest. The brain's ...
Perspective Projection Invariants
(1986-02-01)
An important part of stereo vision consists of finding and matching points in two images which correspond to the same physical element in the scene. We show that zeros of curvature of curves are perspective projection ...
Defining Natural Language Grammars in GPSG
(1986-04-01)
This paper is a formal analysis of whether generalized phrase structure grammar's (GPSG) weak context-free generative power will allow it to achieve three of its central goals: (1) to characterize all and only the ...
Discovery Systems
(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 ...
An Approach To Object Recognition: Aligning Pictorial Descriptions
(1986-12-01)
This paper examines the problem of shape-based object recognition and proposes a new approach, the alignment of pictorial descriptions. The first part of the paper reviews general approaches to visual object recognition ...