Title :
Landweber image restoration with adaptive step-size
Author :
Bilcu, Radu Ciprian ; Trimeche, Mejdi ; Alenius, Sakari ; Vehvilainen, Markku
Author_Institution :
Multimedia Technol. Lab., Nokia Res. Center, Helsinki
Abstract :
The Landweber algorithm is probably one of the simplest iterative method for image restoration which makes it a good choice for practical implementations. In this paper, we introduce a novel Landweber method that uses an adaptive step-size to improve the convergence speed and ensure stability. We review the convergence behavior of the Landweber algorithm and we introduce an enhanced method which we compare with an existing approach that also uses time-varying step-size.
Keywords :
convergence; image restoration; iterative methods; Landweber image restoration; adaptive step-size; convergence speed improvement; iterative methods; time-varying step-size; Additive noise; Convergence; Degradation; Image restoration; Iterative algorithms; Iterative methods; Optical distortion; Optical filters; Optical noise; Stability;
Conference_Titel :
Signal Processing and Its Applications, 2007. ISSPA 2007. 9th International Symposium on
Conference_Location :
Sharjah
Print_ISBN :
978-1-4244-0778-1
Electronic_ISBN :
978-1-4244-1779-8
DOI :
10.1109/ISSPA.2007.4555321
