Zero order elimination for digital holograms: study of setup dependent methods

Halaq, Hanan; Takakura, Yoshitate; Vukičević, Dalibor

doi:10.1109/isacs48493.2019.9068894

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…The hologram is used to subtract the intensity of the reference light from the intensity of the object light. However, it is difficult to capture these three images in the same environment [27]. Chen et al [28] proposed a numerical method based on a linear approximation of the interference equation; this technique, however, is only applicable to amplitude objects with an inline configuration and a plane wave reference whose phase is precisely controlled.…”

Section: Introductionmentioning

confidence: 99%

Suppressing the Zero-Frequency Components in Single Quantitative Phase Imaging by Filtering the Low-Frequency Intrinsic Mode Function Components

et al. 2023

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In off-axis quantitative phase imaging, existing methods of suppressing the zero-frequency component (ZFC) always cause the loss of high-frequency phase information, thus degrading the accuracy of phase reconstruction. To overcome these problems, this paper proposes to preserve the high-frequency information by filtering the intrinsic mode function. In this method, empirical mode decomposition is employed to decompose the interferometric image into a series of intrinsic mode function (IMF) components from high to low frequencies. The decomposed low-frequency IMF components are processed by Gaussian high-pass filters for ZFC suppression, and the high-frequency IMF components and the filtered low-frequency IMF components are combined to obtain the reconstructed hologram. Hilbert transform is then performed on the reconstructed hologram to filter out the conjugate image, leaving only the original image. In order to verify the performance of our proposed method, the phase maps processed by our proposed method are compared with those processed by the Fourier filtering method, wavelet transform-based method and Laplace operator method. The experimental results show that the proposed method not only suppresses ZFC but also achieves higher accuracy in phase reconstruction.

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Section: Introductionmentioning

confidence: 99%

Suppressing the Zero-Frequency Components in Single Quantitative Phase Imaging by Filtering the Low-Frequency Intrinsic Mode Function Components

et al. 2023

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“…The issue with this method is that it needs an uncontrolled vibration environment and the authors do not fully account for the unknown phase-shift that might have been introduced between the object and the reference fields. Another drawback of this approach is justification of the removal of object autocorrelation based on the Taylor expansion, which is unsatisfying as mentioned in [13].…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of complex-object using edge point referencing

Gautam

Singh

Narayanamurthy

et al. 2020

J. Opt.

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For imaging complex-valued objects, generally digital holography is used. In holography, the requirement of a separate reference source could restrict its application. Investigating objects through recording multiple holograms demands a stable platform to keep the reference field the same. Without the reference field, one can obtain only the object autocorrelation term from the far-field intensity pattern. We propose a compact, robust, lensless and common path method to retrieve the complex object information directly from the object autocorrelation using edge point referencing where we control the field at a point located at the periphery of the beam illuminating the object. We show that the object field can be reconstructed and object dynamics can be monitored with high fidelity.

show abstract

Zero order elimination for digital holograms: study of setup dependent methods

Cited by 2 publications

References 20 publications

Suppressing the Zero-Frequency Components in Single Quantitative Phase Imaging by Filtering the Low-Frequency Intrinsic Mode Function Components

Suppressing the Zero-Frequency Components in Single Quantitative Phase Imaging by Filtering the Low-Frequency Intrinsic Mode Function Components

Reconstruction of complex-object using edge point referencing

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