Document Type
Thesis
Date of Award
1-31-1990
Degree Name
Master of Science in Electrical Engineering - (M.S.)
Department
Electrical and Computer Engineering
First Advisor
Walter F. Kosonocky
Second Advisor
Constantine N. Manikopoulos
Third Advisor
Chung H. Lu
Abstract
An off-set-type, one point response uniformity corrector and the associated signal processing circuits was developed to be used for a 160 x 244-element IR-CCD camera with PtSi Schottky-barrier detectors. Image sensors with PtSi Schottky-barrier detectors exhibit two types of noise in the displayed video output, a temporal noise and a spatial fixed pattern noise. The performance of the image sensor, limited by the spatial noise which obscures low contrast detail and limits camera sensitivity, can be improved by a uniformity corrector. The uniformity corrector was constructed to substantially reduce the spatial noise in the output display by digitally subtracting a reference frame of correction factors (formed by averaging sixteen background-exposure frames) from each video signal frame of the image sensor. The efficiency of the uniformity corrector was determined from noise measurements before and after the corrector. A minimum resolvable temperature test was also performed to determine the camera sensitivity for several spatial frequencies. Finally, operation of the 160 x 244-element IR-CCD camera was demonstrated using a standard NTSC TV monitor with and without the uniformity corrector to illustrate the difference in image quality.
Recommended Citation
Blume, Paul D., "Uniformity corrector and signal processing for a 160 x 244-element IR-CCD camera with PtSi Schottky-barrier detectors" (1990). Theses. 2506.
https://digitalcommons.njit.edu/theses/2506
