Real-time correction of intensity nonlinearities in imaging systems

Authors:
Alexander A. Sawchuk
Affiliations:
Department of Electrical Engineering, University of Southern California, Los Angeles, CA
Venue:
IEEE Transactions on Computers
Year:
1977

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Abstract

An analysis of two-dimensional imaging systems with general intensity nonlinearities is presented and several methods for real-time correction are discussed. Exact correction for measurement purposes and approximate correction for the human observer are described, and system implementation is by digital hardware, primarily using programmable read-only memories (PROM's). Calibration techniques for these systems are given, and estimates of computing time and required system complexity are made. Experimental application of these techniques is discussed.