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Title:

Noise reduction for digital holograms in a discrete cosine transform (DCT) domain

Group publication title:

Optica Applicata

Creator:

Choi, Hyun-Jun ; Seo, Young-Ho ; Kim, Dong-Wook

Subject and Keywords:

optyka ; digital hologram ; noise reduction ; discrete cosine transform (DCT) ; holographic reconstruction

Description:

Optica Applicata, Vol. 40, 2010, nr 4, s. 991-1005

Publisher:

Oficyna Wydawnicza Politechniki Wrocławskiej

Place of publication:

Wrocław

Contributor:

Gaj, Miron. Redakcja ; Urbańczyk, Wacław. Redakcja

Date:

2010

Resource Type:

artykuł

Source:

<sygn. PWr A3481II> ; click here to follow the link ; click here to follow the link

Language:

eng

Relation:

Optica Applicata ; Optica Applicata, Vol. 40, 2010 ; Optica Applicata, Vol. 40, 2010, nr 4 ; Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki

Location:

Politechnika Wrocławska

Abstrakt:

This paper presents a method for reducing noise in a digital hologram, which occurs during acquisition. The algorithm proposed initially transforms a digital hologram into frequency-domain data through a discrete cosine transform (DCT), and separates the object from the background in the transformed image. As a noise reduction method, a histogram modification method is applied to the object, while the background is substituted with zero values. Experimental results showed that the proposed scheme improves the visual image quality very much when reconstructed by both the optical system and the PC simulation.

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