Title :
An adaptive super-resolution of videos with noise information on camera systems
Author :
Ono, Toshiyuki ; Hasegawa, Hiroshi ; Yamada, Isao ; Sakaniwa, Kohichi
Author_Institution :
Dept. of Commun. & Integrated Syst., Tokyo Inst. of Technol., Japan
Abstract :
We present a novel adaptive super-resolution of videos based on an embedded constraint version of adaptive projected subgradient method (Yamada & Ogura, Numerical Functional Analysis and Optimization, vol 25, no.7&8, p.593-617, 2004). The super-resolution image recovery problem is formulated as an estimation of linear time-varying systems, which is a modified version of (Elad & Feuer, IEEE Trans. on Image Proc., vol.8, no.3, p.387-395, 1999). Our method efficiently improves the estimation accuracy by simple iterative operations which can be processed on parallel systems. Robustness to additive noise as well as inaccurate estimation of degradation parameters, is realized by incorporating stochastic information of the noise.
Keywords :
adaptive signal processing; gradient methods; image resolution; stochastic systems; video signal processing; adaptive projected subgradient method; adaptive video super-resolution; additive noise robustness; camera system noise information; estimation accuracy; iterative operations; linear time-varying system estimation; noise statistical information; super-resolution image recovery; Additive noise; Cameras; Constraint optimization; Functional analysis; Image resolution; Iterative methods; Noise robustness; Parameter estimation; Time varying systems; Videos;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1415540