Image Restoration and Enhancement

Motion-blurred image restoration using modified inverse all-pole filters

[+] Author Affiliations
Boris Likhterov

Ben-Gurion University, Electrical Engineering Department, POB 653, Beer-Sheva?84105, Israel E-mail: lichtrov@ee.bgu.ac.il

Norman S. Kopeika

Ben-Gurion University, Electrical Engineering Department, POB 653, Beer-Sheva?84105, Israel

J. Electron. Imaging. 13(2), 257-263 (Apr 01, 2004). doi:10.1117/1.1666876
History: Received Aug. 6, 2002; Revised Aug. 21, 2003; Revised Sep. 17, 2003; Accepted Oct. 30, 2003; Online April 01, 2004
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The restoration of vibration-blurred images using measured motion function is considered. Since the blurring filter is of the finite impulse response type, the inverse one is of the all-pole infinite impulse response type. Direct application of the inverse filter to restore images blurred by vibration is attractive because of reduced computation requirements. Space domain filtering allows high parallelization of the process and reduction of required processor speed. However, a pure inverse filter provides excessive noise amplification and is possibly unstable. The proposed technique is to construct a modified inverse filter with preserved all-pole structure and optimized noise and stability properties. A mathematical concept was developed using z-transform properties. An experiment testing the proposed technique was setup and the results indicate restoration is 60%–80% of that possible with ideal Wiener filtering. However, the reduced computation and high parallelization can facilitate real-time restoration. © 2004 SPIE and IS&T.

© 2004 SPIE and IS&T

Citation

Boris Likhterov and Norman S. Kopeika
"Motion-blurred image restoration using modified inverse all-pole filters", J. Electron. Imaging. 13(2), 257-263 (Apr 01, 2004). ; http://dx.doi.org/10.1117/1.1666876


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