title: Coherent noise suppression in digital holography based on flat fielding with apodized apertures.
abstract: Great number of approaches has been carried out in digital holography (DH) in order to overcome the problem of coherent noise in the reconstruction process. In this paper, we describe a new method that can be used to suppress the coherent noise in phase-contrast image. The proposed method is a combination of the flat fielding method and the apodized apertures technique. The proposed method is applied to a sample of 200 μm step height. The quality of the phase-contrast image of the sample is refined and the coherent noise level is reduced drastically by the order of 65%. The proposed method can also applicable to noise reduction of intensity imaging.
authors.affiliation: Division of Mechanical System Engineering, Chonbuk National University, Jeonju, Korea.
authors.forename: D G
authors.initials: DG
authors.lastname: Abdelsalam
authors.forename: Daesuk
authors.initials: D
authors.lastname: Kim