INVESTIGATION OF IMAGE ANALYSIS TECHNIQUES.
Abstract
The objective of this program was to construct a functional model of the frog retina in order to evaluate its performance with respect to operational requirements of the Air Force. This report contains a review of the logic and circuits which were developed to accomplish this objective. A comparison is made between the physiological measurements obtained from frogs and the outputs from the functional model. The features abstracted both by the frog and the model are the presence and location of edges, moving dark convexities, changing contrast, and dimming. A large number of the parameters of the four feature-abstraction functions found in the frog were incorporated in the model. The model was designed so that processing takes place in logic layers (or planes) analogous to those found in the brain of the frog. Although parallel processing is used in the model, a minimum of physical interconnections between processing planes was required. This simplification was accomplished by the use of neon-lamp/photoconductor-cell pairs. These pairs were coupled by the light emitted from a neon lamp on one processing plane to a photoconductor located on the following processing plane. The neon lamps also serve as threshold elements for logic functions. Spatially repetitive patterns of logic were used in each plane to simplify the parallel processing as much as possible. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1963
- Accession Number
- AD0421402
Entities
People
- M. B. Herscher
- T. P. Kelley