Publications related to Aliasing

Fringe filtering technique based on local signal reconstruction using noise subspace inflation

Pramod Rastogi, Rishikesh Dilip Kulkarni

A noise filtering technique is proposed to filter the fringe pattern recorded in the optical measurement set-up. A single fringe pattern carrying the information on the measurand is treated as a data matrix which can either be complex or real valued. In th ...

2016

On Minimal Trajectories for Mobile Sampling of Bandlimited Fields

Martin Vetterli, Jayakrishnan Unnikrishnan

We study the design of sampling trajectories for stable sampling and the reconstruction of bandlimited spatial fields using mobile sensors. The spectrum is assumed to be a symmetric convex set. As a performance metric we use the path density of the set of ...

Elsevier2015

Tutorial: Sub-Nyquist artifacts and sampling moiré effects

Isaac Amidror

Sampling moiré effects are well known in signal processing. They occur when a continuous periodic signal g(x) is sampled using a sampling frequency fs that does not respect the Nyquist condition, and the signal frequency f folds-over and gives a new, false ...

The Royal Society Publishing2015

A Fast Hadamard Transform for Signals with Sub-linear Sparsity in the Transform Domain

Martin Vetterli, Robin Scheibler, Saeid Haghighatshoar

In this paper, we design a new iterative low-complexity algorithm for computing the Walsh-Hadamard transform (WHT) of an N dimensional signal with a K-sparse WHT. We suppose that N is a power of two and K = O(N^α), scales sub-linearly in N for some α ∈ (0, ...

Institute of Electrical and Electronics Engineers2015

MATHICSE Technical Report : Accelerated filtering on graphs using Lanczos method

Pierre Vandergheynst, Daniel Kressner, Nathanaël Perraudin, Ana Susnjara

Sinal-processing on graphs has developed into a very active field of research during the last decade. In particular, the number of applications using frames con-structed from graphs, like wavelets on graphs, has substantially increased. To attain scalabili ...

MATHICSE2015

Random sampling of bandlimited signals on graphs

Pierre Vandergheynst, Rémi Gribonval, Gilles Puy, Nicolas Tremblay

We study the problem of sampling

k

-bandlimited signals on graphs. We propose two sampling strategies that consist in selecting a small subset of nodes at random. The first strategy is non-adaptive, \ie, independent of the graph structure, and its perform ...

2015

Acquisition of multiple phase derivatives from a single frame in digital holographic interferometry

Pramod Rastogi, Rishikesh Dilip Kulkarni

This paper proposes a technique to extract two-dimensional multiple phase derivatives (strains, slopes, and shearing strains) from a single frame of the interference fringe pattern recorded in an optical setup with multiple illumination beams. In the propo ...

Spie-Soc Photo-Optical Instrumentation Engineers2015

Jaggies as aliasing or reconstruction phenomena: a tutorial

Roger Hersch, Isaac Amidror

Jaggies (staircasing effects) along slanted lines or curved edges are omnipresent in digital imaging. They are so widespread in digital display devices that very often they are associated with the modern "computerized" world (and sometimes even intentional ...

Is&T & Spie2014

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Random sampling of bandlimited signals on graphs

Pierre Vandergheynst, Rémi Gribonval, Gilles Puy, Nicolas Tremblay

We study the problem of sampling

k

2015

Aliasing

Fringe filtering technique based on local signal reconstruction using noise subspace inflation

On Minimal Trajectories for Mobile Sampling of Bandlimited Fields

Sub-Nyquist artifacts and sampling moiré effects, Part 2: Spectral-domain analysis

Tutorial: Sub-Nyquist artifacts and sampling moiré effects

A Fast Hadamard Transform for Signals with Sub-linear Sparsity in the Transform Domain

Image Reconstruction in K-Space from MR Data Encoded with Ambiguous Gradient Fields

MATHICSE Technical Report : Accelerated filtering on graphs using Lanczos method

Random sampling of bandlimited signals on graphs

Acquisition of multiple phase derivatives from a single frame in digital holographic interferometry

Jaggies as aliasing or reconstruction phenomena: a tutorial

Graph Chatbot

Chat with Graph Search

Fringe filtering technique based on local signal reconstruction using noise subspace inflation

Tutorial: Sub-Nyquist artifacts and sampling moiré effects

Sub-Nyquist artifacts and sampling moiré effects, Part 2: Spectral-domain analysis

On Minimal Trajectories for Mobile Sampling of Bandlimited Fields

A Fast Hadamard Transform for Signals with Sub-linear Sparsity in the Transform Domain

Image Reconstruction in K-Space from MR Data Encoded with Ambiguous Gradient Fields

MATHICSE Technical Report : Accelerated filtering on graphs using Lanczos method

Random sampling of bandlimited signals on graphs

Acquisition of multiple phase derivatives from a single frame in digital holographic interferometry

Jaggies as aliasing or reconstruction phenomena: a tutorial