Adaptive Two-Dimensional Neighborhood Sensitivity Control By A One-Dimensional Process

Oliver A. Hilsenrath; Yehoshua Y. Zeevi

doi:10.1117/12.969019

25 October 1988 Adaptive Two-Dimensional Neighborhood Sensitivity Control By A One-Dimensional Process

Oliver A. Hilsenrath, Yehoshua Y. Zeevi

Proceedings Volume 1001, Visual Communications and Image Processing '88: Third in a Series; (1988) https://doi.org/10.1117/12.969019
Event: Visual Communications and Image Processing III, 1988, Cambridge, MA, United States

Abstract

The adaptive characteristics of the retina, which operates over an extremely wide range of light intensities, exceed by far the performance of serially accessed sensors such as vidicons or C.C.D.'s. The latter, operating over the entire optical field (or sampled grid) as a single neighborhood, are easily cut off by small areas of high intensity, resulting in the well known effect of "obscured images". Implementation of the biological solution of two-dimensional neighborhood processing, in which sensitivity at a given point is determined by the surrounding (receptive) field, would be the best solution. This approach requires, however, a new generation of still unavailable detector arrays with random access, neighborhood processing and local sensitivity feedback. The approach proposed in this paper is devised for sequentially accessed detectors/detector-arrays with one-dimensional processing, in which a Peano-Hilbert-like scan-path acquires visual data, thereby preserving a compact two-dimensional neighborhood relation. Neighborhood suppression is controlled by the expected value of a one-dimensional string, mapped onto the relevant two-dimensional neighborhood and subtracted, in turn, from the intensity of the delayed central element of the confined data string.

Citation Download Citation

Oliver A. Hilsenrath and Yehoshua Y. Zeevi "Adaptive Two-Dimensional Neighborhood Sensitivity Control By A One-Dimensional Process", Proc. SPIE 1001, Visual Communications and Image Processing '88: Third in a Series, (25 October 1988); https://doi.org/10.1117/12.969019

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