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Vertical Image Registration in Stereopsis
(1983-10-01)
Most computational theories of stereopsis require a registration stage prior to stereo matching to reduce the matching to a one-dimensional search. Even after registration, it is critical that the stereo matching process ...
Scaling Theorems for Zero-Crossings
(1983-06-01)
We characterize some properties of the zero-crossings of the laplacian of signals - in particular images - filtered with linear filters, as a function of the scale of the filter (following recent work by A. Witkin, 1983). ...
Differential Operators for Edge Detection
(MIT Artificial Intelligence Laboratory, 1983-03)
We present several results characterizing two differential operators used for edge detection: the Laplacian and the second directional derivative along the gradient. In particular, (a)we give conditions for coincidence of ...
Cooperative Physics of Fly Swarms: An Emergent Behavior
(1995-04-11)
We have simulated the behavior of several artificial flies, interacting visually with each other. Each fly is described by a simple tracking system (Poggio and Reichardt, 1973; Land and Collett, 1974) which summarizes ...
Hidden Cues in Random Line Stereograms
(MIT Artificial Intelligence Laboratory, 1982-04)
Successful fusion of random-line stereograms with breaks in the vernier acuity range has been interpreted to suggest that the interpolation process underlying hyperacuity is parallel and preliminary to stereomatching. In ...
From Understanding Computation to Understanding Neural Circuitry
(1976-05-01)
The CNS needs to be understood at four nearly independent levels of description: (1) that at which the nature of computation is expressed; (2) that at which the algorithms that implement a computation are characterized; ...
Hidden Clues in Random Line Stereograms
(1983-08-01)
Successful fusion of random-line stereograms with breaks in the vernier acuity range has been previously interpreted to suggest that the interpolation process underlying hyperacuity is parallel and preliminary to ...
A Generalized Ordering Constraint for Stereo Correspondence
(1984-05-01)
The ordering constraint along epipolar lines is a powerful constraint that has been exploited by some recent stereomatching algorithms. We formulate a generalized ordering constraint, not restricted to epipolar lines. ...
Probabilistic Solution of Ill-Posed Problems in Computational Vision
(1987-03-01)
We formulate several problems in early vision as inverse problems. Among the solution methods we review standard regularization theory, discuss its limitations, and present new stochastic (in particular, Bayesian) ...
Evidence for a Fifth, Smaller Channel in Early Human Vision
(1979-08-01)
Recent studies in psychophysics and neurophysiology suggest that the human visual system utilizes a range of different size or spatial frequency tuned mechanisms in its processing of visual information. It has been ...