Suppression of DC term in Fresnel digital holography by sequence subtraction of holograms

TL;DR

This paper introduces a method to improve image quality in Fresnel digital holography by capturing two holograms at different times and subtracting them to suppress the DC term, reducing noise and enhancing reconstructed images.

Contribution

The paper presents a novel sequential subtraction technique for suppressing the DC term in Fresnel digital holography, improving image clarity.

Findings

DC term is effectively suppressed in reconstructed images.

Virtual and real images are successfully reconstructed after subtraction.

Method reduces noise and enhances image quality.

Abstract

An experimental method for suppression of DC term in the reconstructed images from Fresnel digital holograms is presented. In this method, two holograms for the same object are captured sequentially and subtracted. Since these two holograms are captured at different moments, they are slightly different from each other for fluctuations of noises. The DC term is suppressed in the image reconstructed from the subtraction hologram, while the two virtual and real images are successfully reconstructed. This method can be potentially used for the improvement of image quality reconstructed from Fresnel digital holograms.