Home

Person

Pramod Rastogi

This person has left EPFL

About
Privacy
Disclaimer

Graph Chatbot

Related publications (111)

Page 3 of 6

Numerical analysis of fringe patterns recorded in holographic interferometry using high-order ambiguity function

Pramod Rastogi, Sai Siva Gorthi

This letter introduces a new approach for the demodulation of fringe patterns recorded in holographic interferometry using high-order ambiguity function (HAF). The proposed approach is capable of retrieving the phase from a single fringe pattern. The main ...

Taylor & Francis2009

Multiple phase estimation via signal separation using a windowed Fourier transform in digital holographic interferometry

Pramod Rastogi, Rishikesh Dilip Kulkarni

This paper proposes a novel method for the simultaneous estimation of multiple interference phases from a single recording of the interference field in a multi-wave digital holographic interferometry set-up. The method involves the separation of signal com ...

IOP Publishing2015

Closed fringe demodulation using phase decomposition by Fourier basis functions

Pramod Rastogi, Rishikesh Dilip Kulkarni

We report a new technique for the demodulation of a closed fringe pattern by representing the phase as a weighted linear combination of a certain number of linearly independent Fourier basis functions in a given row/column at a time. A state space model is ...

2016

Simultaneous measurement of displacement, strain and curvature in digital holographic interferometry using high- order instantaneous moments

Pramod Rastogi, Sai Siva Gorthi

2009

Iterative signal separation based multiple phase estimation in digital holographic interferometry

Pramod Rastogi, Rishikesh Dilip Kulkarni

We propose a new method for signal separation from a multicomponent interference field recorded in a digital holographic interferometry setup. The setup consisting of multiple object illuminating beams results in an interference field containing multiple s ...

Optical Society of America2015

Simultaneous measurement of in-plane and out-of-plane displacement derivatives using dual-wavelength digital holographic interferometry

Pramod Rastogi, Sai Siva Gorthi, Rajshekhar Gannavarpu

The paper introduces a method for simultaneously measuring the in-plane and out-of-plane displacement derivatives of a deformed object in digital holographic interferometry. In the proposed method, lasers of different wavelengths are used to simultaneously ...

Optical Society of America2011

Application of complex-lag distributions for estimation of arbitrary order phase derivatives in digital holographic interferometry

Pramod Rastogi, Rajshekhar Gannavarpu

This Letter proposes a method to estimate phase derivatives of arbitrary order in digital holographic interferometry. Based on the desired order, the generalized complex-lag distribution is computed from the reconstructed interference field. Subsequently, ...

Optical Society of America2011

Simultaneous estimation of phase and phase derivative using a difference equation representation of the interference field

Pramod Rastogi, Rishikesh Dilip Kulkarni

A computationally efficient technique for fringe analysis in digital holographic interferometry using a difference equation representation of the interference field is presented. The spatially varying coefficient of the difference equation is estimated acc ...

Optical Soc Amer2014

Digital holographic moiré for the direct and simultaneous estimation of strain and slope fields

Pramod Rastogi, Rishikesh Dilip Kulkarni

A novel method is proposed for the direct and simultaneous estimation of multiple phase derivatives corresponding to strain and slope fields from a single moiré fringe pattern in digital holographic moiré. The interference field in a given row/column is a ...

Optical Society of America2014

Discrete chirp Fourier transform based analysis of reconstructed interference fields in digital holographic interferometry

Pramod Rastogi, Sai Siva Gorthi

Taylor & Francis2009

Measurement of Displacement and Its Derivatives from a Phase Fringe Pattern

Pramod Rastogi, Rishikesh Dilip Kulkarni

Noting the fact that the phase and phase derivatives carry the information on the mechanical deformation in optical interferometric measurements techniques, we propose a noise robust fringe analysis technique for the simultaneous estimation of unwrapped ph ...

SPRINGER INTERNATIONAL PUBLISHING AG2019

Phase estimation using a state-space approach based method

Pramod Rastogi, Rajshekhar Gannavarpu

The paper demonstrates a phase estimation method in fringe analysis. The proposed method relies on local polynomial phase approximation and subsequent state-space formulation. The polynomial approximation of phase transforms phase extraction into a paramet ...

Elsevier2013

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

Phase-shifting interferometry in the presence of nonlinear phase steps, harmonics, and noise

Pramod Rastogi, Abhijit Patil, Rajesh Langoju

2006

Windowed high-order ambiguity function method for fringe analysis

Pramod Rastogi, Sai Siva Gorthi

American Institute of Physics2009

Direct unwrapped phase estimation in phase shifting interferometry using Levenberg-Marquardt algorithm

Pramod Rastogi, Rishikesh Dilip Kulkarni

An algorithm for the direct unwrapped phase estimation from the linearly phase shifted interferograms is presented. The temporal fringe intensity along each pixel is represented as a function of fringe amplitude, phase step and the searched phase. These pa ...

Iop Publishing Ltd2017

Pramod Rastogi

Graph Chatbot

Numerical analysis of fringe patterns recorded in holographic interferometry using high-order ambiguity function

Multiple phase estimation via signal separation using a windowed Fourier transform in digital holographic interferometry

Closed fringe demodulation using phase decomposition by Fourier basis functions

Simultaneous measurement of displacement, strain and curvature in digital holographic interferometry using high- order instantaneous moments

Iterative signal separation based multiple phase estimation in digital holographic interferometry

Simultaneous measurement of in-plane and out-of-plane displacement derivatives using dual-wavelength digital holographic interferometry

Application of complex-lag distributions for estimation of arbitrary order phase derivatives in digital holographic interferometry

Simultaneous estimation of phase and phase derivative using a difference equation representation of the interference field

Digital holographic moiré for the direct and simultaneous estimation of strain and slope fields

Discrete chirp Fourier transform based analysis of reconstructed interference fields in digital holographic interferometry

Measurement of Displacement and Its Derivatives from a Phase Fringe Pattern

Phase estimation using a state-space approach based method

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

Phase-shifting interferometry in the presence of nonlinear phase steps, harmonics, and noise

Windowed high-order ambiguity function method for fringe analysis

Direct unwrapped phase estimation in phase shifting interferometry using Levenberg-Marquardt algorithm

Statistical study and experimental verification of high resolution methods in phase-shifting interferometry

Recent developments in interferometry for microsystems metrology

Demodulation of moire fringes in digital holographic interferometry using an extended Kalman filter

Predicting phase step in phase shifting interferometry in the presence of harmonics and noise