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Phantom Stacks: If You Look Too Hard, They Aren't There
(1980-07-01)
A Stack is a very efficient way of allocating and deallocating memory, but it works only with a restricted pattern of usage. Garbage collection is completely flexible but comparatively costly. The implementation of ...
An Information Processing Approach to Understanding the Visual Cortex
(1980-04-01)
An outline description is given of the experimental work on the visual acuity and hyperacuity of human beings. The very high resolution achieved in hyperacuity corresponds to a fraction of the spacing between adjacent ...
A Real Time Garbage Collector Based on the Lifetimes of Objects
(1981-10-01)
In previous heap storage systems, the cost of creating objects and garbage collection is independent of the lifetime of the object. Since objects with short lifetimes account for a large portion of storage use, it's ...
Determining Optical Flow
(1980-04-01)
Optical flow cannot be computed locally, since only one independent measurement is available from the image sequence at a point, while the flow velocity has two components. A second constraint is needed. A method for ...
A Model for the Spatio-Temporal Organization of X- and Y-Type Ganglion Cells in the Primate Retina
(1980-04-01)
A model is proposed for the spatial and temporal characteristics of X- and Y-type responses of ganglion cells in the primate retina. The model is related to a theory of directional selectivity proposed by Marr & Ullman ...
Some Comments on a Recent Theory of Stereopsis
(1980-07-01)
A number of developments have taken place since the formulation of Marr and Poggio's theory of human stereo vision. In particular, these concern the shape of the underlying receptive fields, the control of eye movements ...
EMACS Manual for TWENEX Users
(1983-03-01)
A reference manual for the extensible, customizable, self-documenting real-time display editor. This manual corresponds to EMACS version 162.
The Measurement of Visual Motion
(1982-12-01)
The analysis of visual motion divides naturally into two stages: the first is the measurement of motion, for example, the assignment of direction and magnitude of velocity to elements in the image, on the basis of the ...
Qualitative Process Theory
(1983-05-01)
Things move, collide, flow, bend, heat up, cool down, stretch, break and boil. These and other things that happen to cause changes in objects over time are intuitively characterized as processes. To understand common ...
Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing
(1981-09-01)
In a dendritic tree transient synaptic inputs activating ionic conductances with an equilibrium potential near the resting potential can veto very effectively other excitatory inputs. Analog operations of this type can ...