Title :
Optical system modeling for digital image restoration
Author :
Costello, Thomas P. ; Mikhael, Wasfy B.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Central Florida, Orlando, FL, USA
Abstract :
Defocused digital images may be effectively restored if the imaging system´s optical transfer function (OTF) is known. In this paper, Wiener filtering based on known OTFs is applied to noisy, defocused images to characterize the conditions for useful restoration for a range of noise and defocus levels. Restoration mean-square-error is measured over these ranges as a function of a constant noise/object power spectrum ratio in the Wiener filter equation.
Keywords :
Wiener filters; filtering theory; image restoration; optical transfer function; Wiener filtering; constant noise/object power spectrum ratio; defocused digital images; digital image restoration; mean-square-error; noise levels; optical system modeling; optical transfer function; Digital images; Image restoration; Modeling; Noise level; Optical filters; Optical imaging; Optical noise; Power system restoration; Transfer functions; Wiener filter;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.662229
