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Titolo:
A fast MAP algorithm for high-resolution image reconstruction with multisensors
Autore:
Ng, MK; Yip, AM;
Indirizzi:
Univ Hong Kong, Dept Math, Hong Kong, Hong Kong, Peoples R China Univ HongKong Hong Kong Hong Kong Peoples R China Kong, Peoples R China Univ Calif Los Angeles, Dept Math, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA
Titolo Testata:
MULTIDIMENSIONAL SYSTEMS AND SIGNAL PROCESSING
fascicolo: 2, volume: 12, anno: 2001,
pagine: 143 - 164
SICI:
0923-6082(200104)12:2<143:AFMAFH>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRECONDITIONERS;
Keywords:
MAP; regularization; cosine transform; image reconstruction; structured matrices;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Ng, MK Univ Hong Kong, Dept Math, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China Univ Hong Kong Pokfulam Rd Hong Kong Hong Kong Peoples R China ina
Citazione:
M.K. Ng e A.M. Yip, "A fast MAP algorithm for high-resolution image reconstruction with multisensors", MULTID SYST, 12(2), 2001, pp. 143-164

Abstract

In many applications, it is required to reconstruct a high-resolution image from multiple, undersampled and shifted noisy images. Using the regularization techniques such as the classical Tikhonov regularization and maximum a posteriori (MAP) procedure, a high-resolution image reconstruction algorithm is developed. Because of the blurring process, the boundary values of the low-resolution image are not completely determined by the original imageinside the scene. This paper addresses how to use (i) the Neumann boundarycondition on the image, i.e., we assume that the scene immediately outsideis a reflection of the original scene at the boundary, and (ii) the preconditioned conjugate gradient method with cosine transform preconditioners tosolve linear systems arising from the high-resolution image reconstructionwith multisensors. The usefulness of the algorithm is demonstrated throughsimulated examples.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 06:32:53