Results 101 to 110 of about 5,322 (221)

Automatic Focusing of Off-Axis Digital Holographic Microscopy by Combining the Discrete Cosine Transform Sparse Dictionary with the Edge Preservation Index

Optics
Automatic focusing is a crucial research issue for achieving high-quality reconstructed images in digital holographic microscopy. This paper proposes an automatic focusing method that combines the discrete cosine transform (DCT) sparse dictionary with ...
Zhaoliang Liu, Peizhen Qiu, Yupei Zhang
doaj   +1 more source

Label-free spatio-temporal monitoring of cytosolic mass, osmolarity, and volume in living cells

Nature Communications, 2019
Label-free, spatio-temporal imaging of cellular physiological responses is challenging. Here the authors combine digital holographic microscopy with a millifluidic chip and mathematical modelling to quantify cell volume, mass and cell uptake under ...
Daniel Midtvedt, Erik Olsén, Fredrik Höök, Gavin D. M. Jeffries   +3 more
doaj   +1 more source

In Situ Real-time Visualization and Corrosion Testing of Stainless Steel 316LVM with Emphasis on Digital In-line Holographic Microscopy

, 2012
Digital in-line holographic microscopy (DIHM) has been incorporated as an additional simultaneous in situ optical technique with ellipsomicroscopy for surface imaging and microscopy to study metastable pitting corrosion on stainless steel 316LVM in ...
Klages, Peter E.
core  

Real Time 3-D Cytomorphological Imaging Using Digital Holographic Microscopy and Fluorescence Microscopy for Space Biology

A microscope operating in Digital Holographic Microscopy (DHM) and classical widefield epi-fluorescence microscopy in a time sequential manner is developed to study morphological alterations of mouse myoblast cells under simulated microgravity in real ...
Egli, Marcel, Depeursinge, Christian, Pache, Christophe, Toy, Muhammed Fatih, Kühn, Jonas, Parent, Jérôme   +5 more
core   +1 more source

Broadband Digital Holographic Camera for Microscopy

, 2015
In this thesis, we explore a combination of analog and digital holographic techniques to demonstrate high speed quantitative phase imaging (QPI) using low coherence (broad bandwidth) light sources.
Monemhaghdoust, Zahra
core   +1 more source

synthetic aperture digital holographic Microscopy

, 2014
Digital holographic microscopy (DHM) was developed and. Synthetic aperture is formed by moving the CCD camera to 9 positions and stitched together to increase the field of view with 22 Kilo pixels.We reconstructed the transparent
John, Renu, Ram, G HanuPhani, Prabhu, P Vimal   +2 more
core  

Second Harmonic and Fundamental Wavelength Digital Holographic Microscopy

We report on a new, multi-functional second harmonic generation digital holographic microscope that allows retrieval of an object complex diffraction wavefront at both second harmonic and fundamental wavelengths ...
Depeursinge, Christian, Pavillon, Nicolas, Kühn, Jonas, Shaffer, Etienne   +3 more
core   +1 more source

Simultaneous Cell Morphometry and Refractive Index Measurement with Dual-Wavelength Digital Holographic Microscopy

, 2008
The refractive index and cellular thickness information contained in the phase signal recorded by Digital Holographic Microscopy is measured independently with a dual-wavelength technique exploiting the dispersion of a dye present in the perfusion medium.
Rappaz, Benjamin, Depeursinge, Christian, Tristan Colomb, Pierre J. Magistretti, Magistretti, Pierre J., Benjamin Rappaz, Christian Depeursinge, Marquet, Pierre, Colomb, Tristan, Charrière, Florian, Florian Charrière, Pierre Marquet   +11 more
core   +1 more source

Extended Depth-of-Field and 3D Information Extraction in Digital Holographic Microscopy

, 2009
A comparison of algorithms for depth-of-field extension in the particular field of digital holographic microscopy is presented. Using the reconstruction properties of holography, a simple 3D reconstruction method from a single hologram is deducted ...
Emery, Yves, Depeursinge, Christian, Tristan Colomb, Nicolas Pavillon, Pavillon, Nicolas, Christian Depeursinge, Isabelle Bergoënd, Bergoënd, Isabelle, Colomb, Tristan, Yves Emery   +9 more
core   +1 more source

Compressed Sensing: a new framework for signals recovery and its application in Digital Holography

, 2011
In olografia digitale l'informazione di ampiezza e fase del fronte d'onda di un oggetto può essere ottenuta quantitativamente e analizzata in digitale attraverso la simulazione numerica delle leggi di diffrazione.
Memmolo, Pasquale
core