Improved three-dimensional localization of multiple small objects in close proximity in digital holography

Using intensity gradient- or sparsity-based focus metrics, the ability to accurately localize the three-dimensional (3D) position of a small object in a digital holographic reconstruction of a large field of view is hindered in the presence of multiple nearby objects. A more accurate alternative met...

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Bibliographic Details
Published in:Applied optics (2004) 2021-02, Vol.60 (4), p.A285
Main Authors: Hall, Matthew L, McCall, Philip, Towers, Catherine E, Towers, David P
Format: Article
Language:English
Subjects:
Field of view
Holography
Localization
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Summary:Using intensity gradient- or sparsity-based focus metrics, the ability to accurately localize the three-dimensional (3D) position of a small object in a digital holographic reconstruction of a large field of view is hindered in the presence of multiple nearby objects. A more accurate alternative method for 3D localization, based on evaluation of the complex reconstructed volume, is proposed. Simulations and experimental data demonstrate a reduction in depth positional error for single objects and a notably improved axial resolution of multiple objects in close proximity.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.404432