Document Type
Thesis
Date of Award
5-31-1988
Degree Name
Master of Science in Electrical Engineering - (M.S.)
Department
Electrical Engineering
First Advisor
Andrew Ulrich Meyer
Second Advisor
W. H. Warren Ball
Third Advisor
Alfonse A. Cinotti
Abstract
This work is concerned with the use of the visual Evoked Response (VER) to determine Contrast Sensitivity in humans. For this purpose, a system has been developed where signals, obtained from scalp electrodes, and stimulated by visual grating patterns, are recorded digitized and processed on a personal computer (IBM compatible). Processing includes signal averaging and digital filtering. The system provides storage, retrieval and graphic representation of data as well as the capability to transfer data to other computer systems. Data processing includes parameter estimation of suitable signal models, which provide effective data compression of the signal into a finite set of signal parameters. This is done by least-square method, with initial parameter values estimated manually by graphical representation.
The objective of this work is to establish relations between the signal parameters and contrast sensitivity threshold parameters obtained by subjective testing methods. The system developed is to establish a basis to conduct extensive tests on selected subject groups and to provide these relations as well as their ranges.
Recommended Citation
Lu, Ken-Gen, "Contrast sensitivity measurement via evoked potential" (1988). Theses. 3148.
https://digitalcommons.njit.edu/theses/3148
