Title :
Fast Super-Resolution for Rational Magnification Factors
Author :
Pelletier, Stéphane ; Cooperstock, Jeremy R.
Author_Institution :
McGill Univ., Montreal
fDate :
Sept. 16 2007-Oct. 19 2007
Abstract :
Super-resolution (SR) is a technique that generates a high-resolution (HR) image from a set of low-resolution (LR) ones. Previous preconditioning methods for SR did not consider the case of rational magnification factors. In this paper, a method for preconditioning SR problems involving such factors is presented. We show that by reordering the pixels of the observed LR images, the structure of the linear problem to solve is modified in such a way that preconditioners based on circulant operators can be used. Simulations with magnification factors of practical interest demonstrate the effectiveness of our approach.
Keywords :
image resolution; linear systems; matrix algebra; fast super-resolution; linear problem; preconditioning SR problem; rational magnification factor; Acceleration; Bismuth; Cameras; Equations; Image resolution; Image restoration; Linear systems; Pixel; Strontium; Vectors; Super-resolution; image restoration; linear systems; preconditioning;
Conference_Titel :
Image Processing, 2007. ICIP 2007. IEEE International Conference on
Conference_Location :
San Antonio, TX
Print_ISBN :
978-1-4244-1437-6
Electronic_ISBN :
1522-4880
DOI :
10.1109/ICIP.2007.4379093
