Document Type


Date of Award


Degree Name

Master of Science in Electrical Engineering - (M.S.)


Electrical and Computer Engineering

First Advisor

Walter F. Kosonocky

Second Advisor

Constantine N. Manikopoulos

Third Advisor

Chung H. Lu


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.



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