Grossberg

: A set of long range oriented cells which are excited by cells of their orientation and inhibited by perpendicular orientations.

: Synthesizes an emergent binocular boundary segmentation from combinations of oriented and unoriented elements. Composed of the OC Filter and CC Loop. The OC Filter extracts regions of oriented-contrast and the CC Loop can perform long-rang grouping and completion, and thus creates the Filling-In Barriers (FIB). The boundary contours are invisible since they must be sensitive only to the amount of contrast and not its sign. Output from the BCS goes to the object recognition system which sends learned top-down templates to the BCS.

: Part of the BCS. A cooperative-competitive feedback exchange which creates boundaries between similarly oriented and spatially aligned cells.

: A compensatory process needed to prevent featural quality from flowing out of the percepts of all line endings and corners as orientationally tuned input masks are insensitive to orientation at the ends of scenic lines and corners.

: The fact that elongated receptive fields (i.e. edge detectors) are insensitive to orientation at the ends of thin lines. Motivation for a successive computational stage, end-cutting, which generates line ends.

: FACADE stands for Form-And-Color-And-DEpth. Grossberg's theory of 3-D Figure-Ground Separation in Visual Cortex. (Grossberg, 1994)

: Triggers a diffusive filling-in of featural quality within perceptual domain whose boundaries are determined by output signals from the BCS.

: If spacial vision operates by first attenuating all but the edges in a patter, than how do we ever arrive at a percept of rigid bodies with ample interiors which are the primary objects of vision?

: Filling-in resonant exchange. Procedure by which filling in occurs in older theoretical work.

: Describes the spacial wavelength of the disinhibitory peaks that arise in response to prescribed input patterns
(See also Structural Scales).

: Accurate processing of both low activity and high activity input patterns can be prevented by sensitivity loss due to noise (at the low activity end) and saturation (at the high activity end).

: Part of the BCS. Two successive stages of oriented cells. The first sensitive to direction of contrast, the second insensitive to direction of contrast. Both are sensitive for orientation, position, spacial frequency and amount of contrast. Outputs from the OC filter go to the CC Loop.

: A cell or cell population that is selectively responsive to edges at a specific retina postion and orientation.

: Postulate that mechanisms exist that prevent cooperative mechanisms from grouping across all intervening percepts. A long-range cooperative process is needed to complete boundaries, but it has to be prevented from grouping together inappropriate combinations of inputs. Implemented by a bipole field which receives excitation from one orientation and inhibition from perpendicular orientations.

: Describe how rapidly a network feedback interaction coefficient decrease as a function of distance.
(See also Functional Scales).

: The activities of populations whose initial activation is less than the QT are suppressed, whereas the activity pattern of population whose initial activations exceed the QT is contrast enhances before being stored.