Dr. Nader M. Namazi Profile

Dr. Nader M. Namazi

Professor at Catholic Univ of America

SPIE Involvement:

Author

Publications (24)

SPIE Journal Paper | 5 October 2018

Spectral analysis and implementation of secure chaotic free-space optical communication systems

Marc M. Sepantaie, Nader Namazi, Amir Sepantaie

OE, Vol. 57, Issue 10, 106101, (October 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.10.106101

KEYWORDS: Free space optics, Telecommunications, Scintillation, Binary data, Interference (communication), Receivers, Atmospheric propagation, Turbulence, Signal processing, Mathematical modeling

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Proceedings Article | 17 May 2016 Paper

Identical synchronization of chaotic secure communication systems with channel induced coherence resonance

Marc Sepantaie, Nader Namazi, Amir Sepantaie

Proceedings Volume 9842, 98421D (2016) https://doi.org/10.1117/12.2224638

KEYWORDS: Telecommunications, Binary data, Modulation, Wavelets, Complex systems, Free space optics, Receivers, Transmitters, Discrete wavelet transforms, Wavelet transforms

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Proceedings Article | 22 May 2015 Paper

Secure communication systems using synchronized Lorenz strange attractor on reconfigurable hardware

Marc Sepantaie, Vy Bui, Esam El-Araby, Amir Sepantaie, Georges Nehmatallah, Nader Namazi

Proceedings Volume 9478, 947802 (2015) https://doi.org/10.1117/12.2177589

KEYWORDS: Telecommunications, Binary data, Discrete wavelet transforms, Signal to noise ratio, Prototyping, Receivers, Field programmable gate arrays, Wavelets, Transmitters, Finite impulse response filters

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Proceedings Article | 12 May 2015 Paper

A noise model for the design of a compressive sensing imaging system

Bradley Preece, Todd Du Bosq, Nader Namazi, Georges Nehmetallah, Kevin Kelly

Proceedings Volume 9452, 94520L (2015) https://doi.org/10.1117/12.2177275

KEYWORDS: Imaging systems, Cameras, Signal to noise ratio, Wavelets, Compressed sensing, Image resolution, Reconstruction algorithms, Systems modeling, Visual process modeling, Image quality

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Proceedings Article | 9 June 2014 Paper

Detecting binary non-return-to-zero data in free-space optical communication systems using FPGAs

Vy Bui, Lan Tran, Esam El-Araby, Nader Namazi

Proceedings Volume 9080, 90801G (2014) https://doi.org/10.1117/12.2049850

KEYWORDS: Binary data, Free space optics, Signal to noise ratio, Wavelets, Field programmable gate arrays, Optical filters, Prototyping, Telecommunications, Free space optical communications, Interference (communication)

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Proceedings Article | 25 September 2013 Paper

Prototyping FM data demodulation in free-space optical communication systems using discrete wavelet transformation

Lan Tran, Esam El-Araby, Nader Namazi

Proceedings Volume 8874, 887412 (2013) https://doi.org/10.1117/12.2025201

KEYWORDS: Signal to noise ratio, Discrete wavelet transforms, Free space optics, Prototyping, Frequency modulation, Interference (communication), Field programmable gate arrays, Wavelets, Fermium, Digital signal processing

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Proceedings Article | 2 February 2012 Paper

Global registration and stabilization of jittered and noisy airborne image sequences

Nader Namazi, William Scharpf, Jerome Obermark, James Caron

Proceedings Volume 8295, 82950J (2012) https://doi.org/10.1117/12.912505

KEYWORDS: Image fusion, Image registration, Image processing, Point spread functions, Image restoration, Signal to noise ratio, Cameras, Wavelets, Discrete wavelet transforms, Airborne remote sensing

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SPIE Journal Paper | 1 December 2010

Global registration and moving objects detection in noisy airborne image sequences

Nader Namazi, William Scharpf, Jerome Obermark, James Caron

OE, Vol. 49, Issue 12, 127005, (December 2010) https://doi.org/10.1117/12.10.1117/1.3520057

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Proceedings Article | 8 September 2010 Paper

Use of the EM algorithm in image registration in a scene captured by a moving camera

Nader Namazi, William Scharpf, Jay Obermark, James Caron

Proceedings Volume 7798, 77982I (2010) https://doi.org/10.1117/12.863383

KEYWORDS: Expectation maximization algorithms, Motion estimation, Cameras, Image registration, Distortion, Binary data, Motion detection, Image restoration, Detection and tracking algorithms, Data compression

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Proceedings Article | 2 September 2009 Paper

Image motion detection in a scene captured by a moving camera

Nader Namazi, William Scharpf, James Caron, Michael Fatemi, David Huber, Jay Obermark

Proceedings Volume 7443, 744324 (2009) https://doi.org/10.1117/12.827369

KEYWORDS: Motion detection, Motion estimation, Cameras, Algorithm development, Distortion, Binary data, Image filtering, Video, Data compression, Image compression

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Proceedings Article | 25 September 2007 Paper

Demodulation of FM data in free-space optical communication systems using discrete wavelet transformation

Nader Namazi, Ray Burris, G. Charmaine Gilbreath, Michele Suite

Proceedings Volume 6709, 67091L (2007) https://doi.org/10.1117/12.736032

KEYWORDS: Signal to noise ratio, Discrete wavelet transforms, Fermium, Frequency modulation, Wavelets, Scintillation, Free space optics, Free space optical communications, Demodulation, Interference (communication)

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SPIE Journal Paper | 1 February 2007

Analytical approach to the calculation of probability of bit error and optimum thresholds in free-space optical communication

Nader Namazi, Ray Burris, G. Charmaine Gilbreath

OE, Vol. 46, Issue 02, 025007, (February 2007) https://doi.org/10.1117/12.10.1117/1.2709628

KEYWORDS: Free space optics, Error analysis, Binary data, Wavelets, Analytical research, Optical engineering, Free space optical communications, Signal detection, Telecommunications, Digital filtering

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Proceedings Article | 1 September 2006 Paper

Demodulation of analog data in free-space optical communication systems using discrete wavelet transformation

Nader Namazi, Kenneth Grant, Ray Burris, Christopher Moore, Rita Mahon, William Rabinovich, G. Charmaine Gilbreath

Proceedings Volume 6304, 630405 (2006) https://doi.org/10.1117/12.679062

KEYWORDS: Signal to noise ratio, Discrete wavelet transforms, Wavelets, Analog electronics, Free space optical communications, Free space optics, Demodulation, Data communications, Interference (communication), Scintillation

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SPIE Journal Paper | 1 January 2006

Synchronization and detection of binary data in free-space optical communication systems using Haar wavelet transformation

Nader Namazi, Harris Burris, Charles Conner, G. Charmaine Gilbreath

OE, Vol. 45, Issue 01, 015001, (January 2006) https://doi.org/10.1117/12.10.1117/1.2162029

KEYWORDS: Binary data, Free space optics, Wavelets, Optical engineering, Telecommunications, Data communications, Bandpass filters, Electronic filtering, Optical filters, Modulation

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Proceedings Article | 31 August 2005 Paper

Analytical approach to calculation of probability of bit error and optimum threshholds in free-space optical communication

Nader Namazi, Ray Burris, G. Charmaine Gilbreath

Proceedings Volume 5892, 58920T (2005) https://doi.org/10.1117/12.619236

KEYWORDS: Free space optics, Binary data, Error analysis, Wavelets, Free space optical communications, Analytical research, Telecommunications, Digital filtering, Electronic filtering, Modulation

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Proceedings Article | 20 October 2004 Paper

Synchronization and detection of binary data in free-space optical communication systems using Haar wavelet transformation

Nader Namazi, Ray Burris, Charles Conner, G. Charmaine Gilbreath, William Scharpf

Proceedings Volume 5550, (2004) https://doi.org/10.1117/12.561473

KEYWORDS: Binary data, Free space optics, Wavelets, Telecommunications, Bandpass filters, Linear filtering, Optical filters, Free space optical communications, Receivers, Signal detection

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Proceedings Article | 27 January 2004 Paper

Low-frequency sampling adaptive thresholding for free-space optical communication receivers with multiplicative noise

Harris Burris, Christopher Moore, Michael Vilcheck, Rita Mahon, Mena Stell, Michele Suite, Mark Davis, William Scharpf, Anne Reed, William Rabinovich, G. Gilbreath, Eun Oh, Nader Namazi

Proceedings Volume 5160, (2004) https://doi.org/10.1117/12.507553

KEYWORDS: Signal to noise ratio, Error analysis, Avalanche photodetectors, Receivers, Interference (communication), Sensors, Statistical analysis, Filtering (signal processing), Free space optics, Free space optical communications

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Proceedings Article | 9 December 2002 Paper

Comparison of adaptive methods for optimal thresholding for free-space optical communication receivers with multiplicative noise

Harris Burris, Nader Namazi, Anne Reed, William Scharpf, Christopher Moore, Michael Vilcheck, Mark Davis, Mena Stell, Michele Suite, William Rabinovich, R. Mahon

Proceedings Volume 4821, (2002) https://doi.org/10.1117/12.451059

KEYWORDS: Signal to noise ratio, Filtering (signal processing), Receivers, Free space optical communications, Electronic filtering, Error analysis, Interference (communication), Atmospheric optics, Laser imaging, Algorithms

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Proceedings Article | 9 January 1998 Paper

Simultaneous moving and uncovered-background pixel detection and parameter estimation in video sequences

Kristine Matthews, Nader Namazi

Proceedings Volume 3309, (1998) https://doi.org/10.1117/12.298392

KEYWORDS: Expectation maximization algorithms, Image segmentation, Image processing algorithms and systems, Motion estimation, Image compression, Signal to noise ratio, Video, Quantization, Video coding, Algorithm development

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Proceedings Article | 27 February 1996 Paper

Simultaneous parameter estimation and image segmentation for image sequence coding

Kristine Matthews, Nader Namazi

Proceedings Volume 2727, (1996) https://doi.org/10.1117/12.233179

KEYWORDS: Expectation maximization algorithms, Image segmentation, Image compression, Motion estimation, Image processing algorithms and systems, Signal to noise ratio, Image analysis, Reconstruction algorithms, Fermium, Electrical engineering

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Proceedings Article | 1 December 1991 Paper

Maximum likelihood estimation of affine-modeled image motion

Samir Shaltaf, Nader Namazi

Proceedings Volume 1567, (1991) https://doi.org/10.1117/12.50849

KEYWORDS: Digital image processing, Motion estimation, Affine motion model, Motion models, Image processing, Image analysis, Image filtering, Signal to noise ratio, Image compression, 3D modeling

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Proceedings Article | 1 December 1991 Paper

Nonuniform image motion estimation in transformed-domain

Nader Namazi, John Lipp

Proceedings Volume 1567, (1991) https://doi.org/10.1117/12.50861

KEYWORDS: Transform theory, Motion estimation, Digital image processing, Algorithm development, Image analysis, Image storage, Resistance, Denoising, Image compression, Digital imaging

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SPIE Journal Paper | 1 October 1991

Use of the generalized maximum likelihood algorithm for estimation of Markovian modeled image motion

Nader Namazi, David Foxall

OE, Vol. 30, Issue 10, (October 1991) https://doi.org/10.1117/12.10.1117/12.55968

KEYWORDS: Motion models, Motion estimation, Evolutionary algorithms, Computer simulations, Image compression, Electrical engineering, Optical engineering, Video, Medicine, Environmental sensing

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Proceedings Article | 1 November 1990 Paper

Use of the generalized maximum-likelihood algorithm for estimation of Markovian-modeled image motion

Nader Namazi, David Foxall

Proceedings Volume 1349, (1990) https://doi.org/10.1117/12.23534

KEYWORDS: Motion estimation, Motion models, Digital image processing, Computer simulations, Convolution, Image processing, Error analysis, Image analysis, Televisions, Fourier transforms

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Showing 5 of 24 publications

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