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Inferring 3D Shapes from 2D Codons
(1985-04-01)
All plane curves can be described at an abstract level by a sequence of five primitive elemental shapes, called "condons", which capture the sequential relations between the singular points of curvature. The condon ...
Boundaries of Visual Motion
(1985-04-01)
A representation of visual motion convenient for recognition shouldsmake prominent the qualitative differences among simple motions. Wesargue that the first stage in such a motion representation is to makesexplicit ...
Visual Routines
(1983-06-01)
This paper examines the processing of visual information beyond the creation of the early representations. A fundamental requirement at this level is the capacity to establish visually abstract shape properties and ...
Computing Visible-Surface Representations
(1985-03-01)
The low-level interpretation of images provides constraints on 3D surface shape at multiple resolutions, but typically only at scattered locations over the visual field. Subsequent visual processing can be facilitated ...
Codon Constraints on Closed 2D Shapes
(1984-05-01)
Codons are simple primitives for describing plane curves. They thus are primarily image-based descriptors. Yet they have the power to capture important information about the 3-D world, such as making part boundaries ...
Generating and Generalizing Models of Visual Objects
(1985-07-01)
We report on initial experiments with an implemented learning system whose inputs are images of two-dimensional shapes. The system first builds semantic network descriptions of shapes based on Brady's smoothed local ...
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 ...
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 ...
Toward a Surface Primal Sketch
(1985-04-01)
This paper reports progress toward the development of a representation of significant surface changes in dense depth maps. We call the representation the Surface Primal Sketch by analogy with representation of intensity ...
The Computational Approach to Vision and Motor Control
(1985-08-01)
Over the past decade it has become increasingly clear that to understand the brain, we must study not only its biochemical and biophysical mechanisms and its outward perceptual and physical behavior. We also must study ...