Title :
Analytical method to calculate optical transfer functions for image motion and its implementation in vibrated image restoration
Author :
Stern, A. ; Kopeika, N.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
A convenient form with which to quantify image degradation due to motion and vibration is the optical transfer function (OTF). We introduce a new method of calculating the OTF for image blur caused by arbitrary motion. Previous methods, except for a few specific types of motion, were numerical rather then analytical. This new method make it possible to obtain analytical expressions for the OTF, deriving from any kind of motion, by means of the statistical moments of the motion function. An analytical OTF expression is derived for sinusoidal vibrations. An example of the implementation of the method in restoration of images blurred randomly by low-frequency vibration is presented
Keywords :
approximation theory; convergence of numerical methods; image restoration; method of moments; motion estimation; optical transfer function; vibrations; OTF; analytical method; approximate analytical OTF expression; convergence; image blur; image degradation; image motion; low-frequency vibration; moment method; motion function; optical transfer functions; sinusoidal vibrations; statistical moments; vibrated image restoration; Degradation; Fourier transforms; Frequency; Image analysis; Image motion analysis; Image restoration; Moment methods; Motion analysis; Optical sensors; Transfer functions;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 1996., Nineteenth Convention of
Conference_Location :
Jerusalem
Print_ISBN :
0-7803-3330-6
DOI :
10.1109/EEIS.1996.566994
