Publications related to Spatial filtering and aperture apodization in digital holographic microscopy

Continuous-Domain Signal Reconstruction Using L-p-Norm Regularization

We focus on the generalized-interpolation problem. There, one reconstructs continuous-domain signals that honor discrete data constraints. This problem is infinite-dimensional and ill-posed. We make it well-posed by imposing that the solution balances data ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

Fourier-Domain Optimization for Image Processing

Sabine Süsstrunk, Radhakrishna Achanta, Majed El Helou, Frederike Dümbgen

Image optimization problems encompass many applications such as spectral fusion, deblurring, deconvolution, dehazing, matting, reflection removal and image interpolation, among others. With current image sizes in the order of megabytes, it is extremely exp ...

arXiv2018

Compact lensless digital holography

Manon Rostykus

Microscopy is of high interest for biology since it allows imaging features that are too small to be seen with naked eyes. However, cells are mostly transparent to visible and infrared light which makes it difficult to see with a traditional microscope. To ...

EPFL2018

Hermite Snakes with Control of Tangents

Michaël Unser, Julien René Pierre Fageot, Virginie Sophie Uhlmann

We introduce a new model of parametric contours defined in a continuous fashion. Our curve model relies on Hermite spline interpolation and can easily generate curves with sharp discontinuities; it also grants direct access to the tangent at each location. ...

IEEE2016

Statistical Optimality of Hermite Splines

Michaël Unser, Julien René Pierre Fageot, Virginie Sophie Uhlmann, Harshit Gupta

Hermite splines are commonly used for interpolating data when samples of the derivative are available, in a scheme called Hermite interpolation. Assuming a suitable statistical model, we demonstrate that this method is actually optimal for reconstructing r ...

IEEE2015

Propagation of the Lower Hybrid wave in a density fluctuating SOL

Joan Decker

The perturbation of the lower hybrid wave (LH) power spectrum by fluctuations of the plasma in the vicinity of the antenna is investigated by solving the full wave equation in a slab geometry using COMSOL MultiphysicsÂ®. The numerical model whose generalit ...

2015

Handheld high-throughput plasmonic biosensor using computational on-chip imaging

Hatice Altug, Arif Engin Cetin, Min Huang

We demonstrate a handheld on-chip biosensing technology that employs plasmonic microarrays coupled with a lens-free computational imaging system towards multiplexed and high-throughput screening of biomolecular interactions for point-of-care applications a ...

2014

Estimation of phase derivatives using discrete energy separation algorithm in digital holographic interferometry

Pramod Rastogi, Rishikesh Dilip Kulkarni

This Letter proposes a new method for the estimation of the first-and second-order phase derivatives corresponding to strain and curvature from a single fringe pattern in digital holographic interferometry. The method is based on a discrete energy separati ...

Optical Soc Amer2014

Cardinal Hermite Exponential Splines: Theoretical Insights and Applications to Active Contours

Michaël Unser, Virginie Sophie Uhlmann

Cardinal Hermite exponential spline functions are a generalization of the classical cardinal Hermite polynomial splines. In this work we consider the 4-dimensional space

ε _{ 4 }

= {1, x,

e ^{ \alpha x }

,

e ^{ -\alpha x }

} with α ∈ $ ℝ ^{ + } ...

SMAI-SIGMA2014

Phase Retrieval for Sparse Signals: Uniqueness Conditions

Martin Vetterli, Yue Lu, Juri Ranieri, Amina Chebira

In a variety of fields, in particular those involving imaging and optics, we often measure signals whose phase is missing or has been irremediably distorted. Phase retrieval attempts the recovery of the phase information of a signal from the magnitude of i ...

2013

Spatial filtering and aperture apodization in digital holographic microscopy

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Continuous-Domain Signal Reconstruction Using L-p-Norm Regularization

Fourier-Domain Optimization for Image Processing

Compact lensless digital holography

Hermite Snakes with Control of Tangents

Statistical Optimality of Hermite Splines

Propagation of the Lower Hybrid wave in a density fluctuating SOL

Handheld high-throughput plasmonic biosensor using computational on-chip imaging

Estimation of phase derivatives using discrete energy separation algorithm in digital holographic interferometry

Cardinal Hermite Exponential Splines: Theoretical Insights and Applications to Active Contours

Phase Retrieval for Sparse Signals: Uniqueness Conditions

Phase Retrieval for Sparse Signals: Uniqueness Conditions

Cardinal Hermite Exponential Splines: Theoretical Insights and Applications to Active Contours

Estimation of phase derivatives using discrete energy separation algorithm in digital holographic interferometry

Continuous-Domain Signal Reconstruction Using L-p-Norm Regularization

Fourier-Domain Optimization for Image Processing

Compact lensless digital holography

Statistical Optimality of Hermite Splines

Propagation of the Lower Hybrid wave in a density fluctuating SOL

Hermite Snakes with Control of Tangents

Handheld high-throughput plasmonic biosensor using computational on-chip imaging