CyberinfraV1, Main, Exploration, bibRecord, 000B18

Effect of noise in image restoration of Multi-aperture Telescope

Identifieur interne : 000B18 ( Main/Exploration ); précédent : 000B17; suivant : 000B19

Effect of noise in image restoration of Multi-aperture Telescope

Auteurs : ZHIWEI ZHOU [République populaire de Chine] ; DAYONG WANG [République populaire de Chine] ; YUNXIN WAN [République populaire de Chine] ; YUHONG WAN [République populaire de Chine]

Source :

Proceedings of SPIE, the International Society for Optical Engineering [ 0277-786X ] ; 2010.

RBID : Pascal:11-0004588

Descripteurs français

Pascal (Inist)
- Restauration image, Traitement image, Haute résolution, Image multiple, Qualité image, Image floue, Télescope, Résolution angulaire, Miroir, Bruit additif, Niveau bruit, Diamètre, Filtre Wiener, Fonction transfert, Rapport signal bruit, Réduction bruit, Variation totale, Déconvolution aveugle, Méthode itérative, Télévision.
Wicri :
- topic : Télévision.

English descriptors

KwdEn :
- Additive noise, Angular resolution, Blind deconvolution, Blurred image, Diameter, High resolution, Image processing, Image quality, Image restoration, Iterative method, Mirror, Multiple image, Noise level, Noise reduction, Signal to noise ratio, Telescope, Television, Total variation, Transfer function, Wiener filter.

Abstract

Multi-aperture telescope is proposed to achieve high angular resolution without fabricating a large diameter monolithic primary mirror. Due to the array structure, the multi-aperture telescope has almost the same cut-off frequency as an equivalent diameter telescope, but decrease in the area of light collecting, which is the reason that the direct output image of multi-aperture telescope is blurred and low contrast. The additive noise level is another reason for low image quality. The Wiener filter is sensitive to noise because of the zero value out of the cut-off frequency in optical transfer function. An alternative image deblurring method is total variation (TV) blind deconvolution. The TV method is an iterative algorithm and preserves the edge information well. The most important characteristic of TV blind deconvolution is that the algorithm is still working with high noise level and produces reasonable result.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000088
to stream PascalFrancis, to step Curation: 000157
to stream PascalFrancis, to step Checkpoint: 000124
to stream Main, to step Merge: 000B23
to stream Main, to step Curation: 000B18

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Additive noise</term>
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<term>Image processing</term>
<term>Image quality</term>
<term>Image restoration</term>
<term>Iterative method</term>
<term>Mirror</term>
<term>Multiple image</term>
<term>Noise level</term>
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<term>Image floue</term>
<term>Télescope</term>
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<front><div type="abstract" xml:lang="en">Multi-aperture telescope is proposed to achieve high angular resolution without fabricating a large diameter monolithic primary mirror. Due to the array structure, the multi-aperture telescope has almost the same cut-off frequency as an equivalent diameter telescope, but decrease in the area of light collecting, which is the reason that the direct output image of multi-aperture telescope is blurred and low contrast. The additive noise level is another reason for low image quality. The Wiener filter is sensitive to noise because of the zero value out of the cut-off frequency in optical transfer function. An alternative image deblurring method is total variation (TV) blind deconvolution. The TV method is an iterative algorithm and preserves the edge information well. The most important characteristic of TV blind deconvolution is that the algorithm is still working with high noise level and produces reasonable result.</div>
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Effect of noise in image restoration of Multi-aperture Telescope

Effect of noise in image restoration of Multi-aperture Telescope

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri