Dr. Leon Cohen Profile

Dr. Leon Cohen

Professor

SPIE Involvement:

Conference Program Committee | Author

Publications (87)

Proceedings Article | 14 May 2019 Presentation + Paper

Manifestly positive series approximation to probability densities

L. Cohen

Proceedings Volume 10988, 109880Q (2019) https://doi.org/10.1117/12.2520153

KEYWORDS: Probability theory, Quantum mechanics

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Proceedings Article | 30 April 2018 Presentation + Paper

Series approximation to probability densities

L. Cohen

Proceedings Volume 10648, 106480C (2018) https://doi.org/10.1117/12.2304808

KEYWORDS: Transform theory, Probability theory, Time series analysis

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Proceedings Article | 12 May 2016 Paper

Pulse propagation in wavelet phase space

Patrick Loughlin, Leon Cohen

Proceedings Volume 9844, 98440K (2016) https://doi.org/10.1117/12.2223992

KEYWORDS: Wave propagation, Wavelets, Wavelet transforms, Continuous wavelet transforms, Spatial frequencies, Fourier transforms, Physics, Automatic target recognition, Mahalanobis distance, Current controlled current source

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Proceedings Article | 12 May 2016 Paper

Transformation of distributions into heavy tailed

Leon Cohen

Proceedings Volume 9844, 98440J (2016) https://doi.org/10.1117/12.2223130

KEYWORDS: Probability theory, Statistical modeling, Physics, Automatic target recognition, Mahalanobis distance, Current controlled current source

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Proceedings Article | 22 May 2015 Paper

Instantaneous bandwidth

Leon Cohen

Proceedings Volume 9476, 94760I (2015) https://doi.org/10.1117/12.2180133

KEYWORDS: Frequency modulation, Amplitude modulation, Fermium, Modulation, Phase shift keying, Fourier transforms, Automatic target recognition, Mahalanobis distance, Current controlled current source, Signal analyzers

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Proceedings Article | 13 June 2014 Paper

Nonstationary noise propagation with sources

J. Ben-Benjamin, L. Cohen

Proceedings Volume 9090, 909007 (2014) https://doi.org/10.1117/12.2053113

KEYWORDS: Wave propagation, Particles, Free space, Lutetium, Dispersion, Waveguides, Space operations, Automatic target recognition, Mahalanobis distance, Current controlled current source

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Proceedings Article | 10 June 2013 Paper

Propagation in channels

J. Ben-Benjamin, L. Cohen

Proceedings Volume 8744, 874413 (2013) https://doi.org/10.1117/12.2020726

KEYWORDS: Dispersion, Differential equations, Wave propagation, Signal attenuation, Partial differential equations, Fourier transforms, Detection and tracking algorithms, Automatic target recognition, Mahalanobis distance, Current controlled current source

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Proceedings Article | 3 May 2012 Paper

The scintillation index for reverberation noise

L. Cohen, A. Ahmad

Proceedings Volume 8391, 83910F (2012) https://doi.org/10.1117/12.919456

KEYWORDS: Scintillation, Interference (communication), Automatic target recognition, Mahalanobis distance, Current controlled current source, Crystals

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Proceedings Article | 3 May 2012 Paper

Constructing and estimating probability distributions from moments

J. Tekel, L. Cohen

Proceedings Volume 8391, 83910E (2012) https://doi.org/10.1117/12.919443

KEYWORDS: Probability theory, Automatic target recognition, Mahalanobis distance, Current controlled current source

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Proceedings Article | 19 May 2011 Paper

Time dependent moments for a nonstationary noise model

L. Cohen, A. Ahmad

Proceedings Volume 8049, 80490B (2011) https://doi.org/10.1117/12.883977

KEYWORDS: Scintillation, Interference (communication), Stars, Radar, Plasma physics, Astronomy, Speckle, Automatic target recognition, Mahalanobis distance, Current controlled current source

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Proceedings Article | 19 May 2011 Paper

Probability distribution for intensity for a reverberation model

A. Ahmad, L. Cohen

Proceedings Volume 8049, 80490D (2011) https://doi.org/10.1117/12.883997

KEYWORDS: Computer simulations, Interference (communication), Coastal modeling, Automatic target recognition, Mahalanobis distance, Current controlled current source

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Proceedings Article | 13 May 2010 Paper

Moments in a random medium with dispersion

Y. Yang, L. Cohen

Proceedings Volume 7696, 76960H (2010) https://doi.org/10.1117/12.850076

KEYWORDS: Wave propagation, Dispersion, Radar, Acoustics, Fiber optics, Automatic target recognition, Automatic tracking, Optical tracking, Laser systems engineering, Laser applications

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Proceedings Article | 13 May 2010 Paper

Reverberation in a dispersive medium

Leon Cohen

Proceedings Volume 7696, 769602 (2010) https://doi.org/10.1117/12.850071

KEYWORDS: Interference (communication), Projection systems, Target detection, Control systems, Active sonar, Statistical modeling, Tin, Automatic target recognition, Automatic tracking, Optical tracking

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Proceedings Article | 3 September 2009 Paper

Clutter model with dispersion

Leon Cohen

Proceedings Volume 7444, 74440T (2009) https://doi.org/10.1117/12.834175

KEYWORDS: Signal attenuation, Scintillation, Interference (communication), Tin, Multiple scattering, Fourier transforms, Time-frequency analysis, Mathematics, Signal processing, Data processing

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Proceedings Article | 5 May 2009 Paper

Time-frequency representations and operators

Leon Cohen

Proceedings Volume 7335, 73350J (2009) https://doi.org/10.1117/12.818743

KEYWORDS: Differential equations, Time-frequency analysis, Partial differential equations, Fourier transforms, Automatic target recognition, Mahalanobis distance, Current controlled current source, Probability theory, Ordinary differential equations, Gold

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Proceedings Article | 5 May 2009 Paper

Transformation of time dependent probability distributions

Juraj Tekel, Leon Cohen

Proceedings Volume 7335, 733505 (2009) https://doi.org/10.1117/12.818503

KEYWORDS: Relativity, Dispersion, Diffusion, Automatic target recognition, Mahalanobis distance, Current controlled current source, Wave propagation

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Proceedings Article | 9 September 2008 Paper

Construction of time-frequency distributions for fields

Leon Cohen

Proceedings Volume 7074, 70740O (2008) https://doi.org/10.1117/12.801359

KEYWORDS: Wave propagation, Differential equations, Particles, Time-frequency analysis, Mechanics, Fourier transforms, Partial differential equations, Medium wave, Scientific research, Signal processing

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Proceedings Article | 25 September 2007 Paper

Time-varying spectral analysis in exercise and sport science

Barry Frishberg, Lorenzo Galleani, Leon Cohen

Proceedings Volume 6697, 66970A (2007) https://doi.org/10.1117/12.740183

KEYWORDS: Time-frequency analysis, Heart, Signal generators, Biological research, Signal analyzers, Computer simulations, Fourier transforms, Signal detection, Information operations, Physical phenomena

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Proceedings Article | 25 September 2007 Paper

Linear invariant systems

Leon Cohen

Proceedings Volume 6697, 669707 (2007) https://doi.org/10.1117/12.740184

KEYWORDS: Signal processing

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Proceedings Article | 25 September 2007 Paper

Construction of time-frequency representations from moments

Leon Cohen, Patrick Loughlin, Keith Davidson

Proceedings Volume 6697, 66970B (2007) https://doi.org/10.1117/12.740191

KEYWORDS: Time-frequency analysis, Fermium, Frequency modulation, Scientific research, Applied physics, Signal processing, Acoustics, Scattering, Fourier transforms

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Proceedings Article | 21 June 2007 Paper

Fluctuations in speech

Srinivasan Umesh, Leon Cohen, Douglas Nelson

Proceedings Volume 6602, 66020G (2007) https://doi.org/10.1117/12.726586

KEYWORDS: Californium, Acoustics, Defense and security, Fourier transforms, Biomedical optics, Lead, Solids, Atrial fibrillation

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Proceedings Article | 21 June 2007 Paper

Time-varying spectral analysis of astronomical time series

Lorenzo Galleani, Leon Cohen, Douglas Nelson, Tomaso Belloni

Proceedings Volume 6603, 660315 (2007) https://doi.org/10.1117/12.728759

KEYWORDS: Astronomy, X-rays, Photonics, Quantum optics, Optical communications, Quantum communications, Electroluminescence, Tin, Fermium, Frequency modulation

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Proceedings Article | 15 June 2007 Paper

Time-frequency analysis of econometric time series

Sharif Corinaldi, Leon Cohen

Proceedings Volume 6601, 660117 (2007) https://doi.org/10.1117/12.726112

KEYWORDS: Time-frequency analysis, Stochastic processes, Complex systems

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Proceedings Article | 7 May 2007 Paper

Constructing densities from moments

Leon Cohen, Keith Davidson, Patrick Loughlin

Proceedings Volume 6566, 65660H (2007) https://doi.org/10.1117/12.720651

KEYWORDS: Time-frequency analysis, Fourier transforms, Scientific research, Applied physics, Automatic target recognition, Fermium, Frequency modulation

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Proceedings Article | 7 May 2007 Paper

Construction and correction of probability densities

Leon Cohen

Proceedings Volume 6566, 656615 (2007) https://doi.org/10.1117/12.720263

KEYWORDS: Probability theory, Scientific research, Automatic target recognition, Gold, Time-frequency analysis, Quantum mechanics

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Proceedings Article | 8 September 2006 Paper

Time-frequency analysis of classical and quantum noise

Y. Yang, L. Cohen

Proceedings Volume 6313, 63130O (2006) https://doi.org/10.1117/12.684024

KEYWORDS: Time-frequency analysis, Signal processing, Oscillators

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Proceedings Article | 5 September 2006 Paper

Local signal to noise ratio

Lorenzo Galleani, Leon Cohen, Douglas Nelson

Proceedings Volume 6313, 63130Q (2006) https://doi.org/10.1117/12.684026

KEYWORDS: Signal to noise ratio, Interference (communication), Time-frequency analysis, Computer simulations, Signal detection, Stars, Defense and security, Fourier transforms, Numerical simulations, Signal processing

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Proceedings Article | 5 September 2006 Paper

Local stationarity and time-frequency distributions

Lorenzo Galleani, Leon Cohen, Bruce Suter

Proceedings Volume 6313, 63130Z (2006) https://doi.org/10.1117/12.684027

KEYWORDS: Time-frequency analysis, Signal processing

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Proceedings Article | 18 May 2006 Paper

Nonstationary and stationary noise

Lorenzo Galleani, Leon Cohen

Proceedings Volume 6234, 623416 (2006) https://doi.org/10.1117/12.668448

KEYWORDS: Automatic target recognition, Time-frequency analysis

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Proceedings Article | 18 May 2006 Paper

Recognition of propagating vibrations and invariant features for classification

Greg Okopal, Patrick Loughlin, Leon Cohen

Proceedings Volume 6234, 623415 (2006) https://doi.org/10.1117/12.668253

KEYWORDS: Wave propagation, Optical spheres, Backscatter, Dispersion, Fourier transforms, Automatic target recognition, Waveguides, Wave plates, Target recognition, Signal attenuation

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Proceedings Article | 17 September 2005 Paper

The speech scale and spectral transformation

Srinivasan Umesh, Leon Cohen, Douglas Nelson

Proceedings Volume 5914, 59140G (2005) https://doi.org/10.1117/12.617609

KEYWORDS: Commercial off the shelf technology, Error analysis, Ear, Transform theory, Mouth, Computer science, Defense and security, Fourier transforms, Mathematical modeling, Wavelets

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Proceedings Article | 17 September 2005 Paper

Spectral modeling of nonstationary clouds

Lorenzo Galleani, Leon Cohen, Gabriel Cristobal, Bruce Suter

Proceedings Volume 5910, 591017 (2005) https://doi.org/10.1117/12.623606

KEYWORDS: Clouds, Spectral models, Filtering (signal processing), Denoising, Convolution, Algorithm development, Analytical research, Roads, Humidity, Fourier transforms

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Proceedings Article | 16 September 2005 Paper

Detection of false transients

Lorenzo Galleani, Leon Cohen, Douglas Nelson

Proceedings Volume 5910, 59100C (2005) https://doi.org/10.1117/12.617662

KEYWORDS: Time-frequency analysis, Interference (communication), Signal to noise ratio, Signal detection, Sensors, Defense and security, Fourier transforms, Signal processing, Detection and tracking algorithms, Stars

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Proceedings Article | 2 November 2004 Paper

Volumetric image fusion using the pseudo-Wigner distribution

Salvador Gabarda, Gabriel Cristobal, Sylvain Fischer, Rafael Redondo, Lorenzo Galleani, Leon Cohen

Proceedings Volume 5558, (2004) https://doi.org/10.1117/12.561108

KEYWORDS: Image fusion, Image enhancement, Image processing, Distance measurement, Image restoration, Image quality, Image resolution, Cameras, Quality measurement, Microorganisms

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Proceedings Article | 26 October 2004 Paper

Phase-space approach to wave propagation with dispersion and damping

Patrick Loughlin, Leon Cohen

Proceedings Volume 5559, (2004) https://doi.org/10.1117/12.564249

KEYWORDS: Wave propagation, Dispersion, Fourier transforms, Time-frequency analysis, Signal attenuation, Spatial frequencies, Astatine, Partial differential equations, Waveguides, Signal processing

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Proceedings Article | 26 October 2004 Paper

Wave propagation with dispersion and damping

Leon Cohen

Proceedings Volume 5559, (2004) https://doi.org/10.1117/12.564247

KEYWORDS: Wave propagation, Fourier transforms, Dispersion, Differential equations, Signal processing, Signal attenuation

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Proceedings Article | 26 October 2004 Paper

Time-varying noise

Lorenzo Galleani, Leon Cohen

Proceedings Volume 5559, (2004) https://doi.org/10.1117/12.564250

KEYWORDS: Signal processing

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Proceedings Article | 21 September 2004 Paper

Moment features invariant to dispersion

Patrick Loughlin, Leon Cohen

Proceedings Volume 5426, (2004) https://doi.org/10.1117/12.542424

KEYWORDS: Wave propagation, Fourier transforms, Time-frequency analysis, Dispersion, Bandpass filters, Digital filtering, Radar, Automatic target recognition, Time metrology, Spatial filters

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Proceedings Article | 21 September 2004 Paper

Stationary phase approximation: a modification

Leon Cohen, Patrick Loughlin

Proceedings Volume 5426, (2004) https://doi.org/10.1117/12.542447

KEYWORDS: Wave propagation, Automatic target recognition, Fourier transforms

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Proceedings Article | 10 August 2004 Paper

Deriving uniformly spaced samples from a nonuniformly sampled function via time warping with applications to fast transforms

John Browning, Alan Lindsey, Leon Cohen

Proceedings Volume 5440, (2004) https://doi.org/10.1117/12.562327

KEYWORDS: Transform theory, Fourier transforms, Atrial fibrillation, Convolution, Analytical research, Algorithm development, Integral transforms, Nonuniform sampling, Distortion, Bessel functions

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Proceedings Article | 25 May 2004 Paper

The history of noise

Leon Cohen

Proceedings Volume 5473, (2004) https://doi.org/10.1117/12.547847

KEYWORDS: Chemical species, Stochastic processes, Particles, Differential equations, Chemistry, Vacuum tubes, Thermodynamics, Molecules, Physics, Electrical engineering

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Proceedings Article | 25 May 2004 Paper

Cloud denoising

Salvador Gabarda, Gabriel Cristobal, Lorenzo Galleani, Leon Cohen

Proceedings Volume 5467, (2004) https://doi.org/10.1117/12.547635

KEYWORDS: Clouds, Image fusion, Denoising, Spatial frequencies, Cameras, Image registration, Image enhancement, Fluctuations and noise, Biomedical optics, Image filtering

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Proceedings Article | 25 May 2004 Paper

The description of nonstationary noise

Lorenzo Galleani, Leon Cohen

Proceedings Volume 5471, (2004) https://doi.org/10.1117/12.547625

KEYWORDS: Complex systems, Stochastic processes

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Proceedings Article | 30 December 2003 Paper

On the 1/f model for cloud generation

Lorenzo Galleani, Leon Cohen, Gabriel Cristobal, Bruce Suter

Proceedings Volume 5200, (2003) https://doi.org/10.1117/12.506854

KEYWORDS: Clouds, Differential equations, Fourier transforms, Systems modeling, Numerical simulations, Analytical research, Roads, Evolutionary algorithms, Stochastic processes, Neural networks

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Proceedings Article | 24 December 2003 Paper

The marginals and time-frequency distributions

Leon Cohen, Patrick Loughlin

Proceedings Volume 5205, (2003) https://doi.org/10.1117/12.513899

KEYWORDS: Time-frequency analysis, Surface plasmons, Fourier transforms, Signal processing, Fermium, Frequency modulation, Numerical simulations, Physics, Differential equations, Visualization

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Proceedings Article | 24 December 2003 Paper

Time-frequency characterization of random systems

Lorenzo Galleani, Leon Cohen

Proceedings Volume 5205, (2003) https://doi.org/10.1117/12.513900

KEYWORDS: Time-frequency analysis, Fourier transforms, Filtering (signal processing), Particles, Continuous wavelet transforms, Signal processing, Electronic filtering, Differential equations, Wavelet transforms, Stochastic processes

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Proceedings Article | 19 November 2003 Paper

Texture discrimination using the Wigner-Ville distribution

Javier Hormigo, Gabriel Cristobal, Leon Cohen, Lorenzo Galleani, Bruce Suter

Proceedings Volume 5203, (2003) https://doi.org/10.1117/12.506881

KEYWORDS: Principal component analysis, Image segmentation, Signal analyzers, Image analysis, Filtering (signal processing), Medical imaging, Data compression, Image classification, Neural networks, Smoothing

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Proceedings Article | 13 November 2003 Paper

Estimating speaker scale factors from vowels

Douglas Nelson, David Smith, Srinivasan Umesh, Leon Cohen

Proceedings Volume 5207, (2003) https://doi.org/10.1117/12.507416

KEYWORDS: Factor analysis, Databases, Ear, Composites, Defense and security, Fourier transforms, Mendelevium, Defense technologies, Wavelets, Signal processing

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Proceedings Article | 6 December 2002 Paper

The speech scale, the Mel scale, and the tube model for speech

Srinivasan Umesh, Leon Cohen, Douglas Nelson

Proceedings Volume 4791, (2002) https://doi.org/10.1117/12.456493

KEYWORDS: Commercial off the shelf technology, Fourier transforms, Composites, Ear, Mouth, Defense and security, Signal processing, Acoustics, Laser induced plasma spectroscopy

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Proceedings Article | 6 December 2002 Paper

Phase-amplitude study of clouds

Lorenzo Galleani, Leon Cohen, Gabriel Cristobal, Bruce Suter

Proceedings Volume 4791, (2002) https://doi.org/10.1117/12.456491

KEYWORDS: Clouds, Denoising, Fourier transforms, Filtering (signal processing), Image analysis, Analytical research, Roads, Signal processing, Linear filtering, Optical inspection

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Proceedings Article | 15 November 2002 Paper

Segmentation, autofocusing, and signature extraction of tuberculosis sputum images

Manuel Forero-Vargas, Filip Sroubek, Josue Alvarez-Borrego, Norberto Malpica, Gabriel Cristobal, Andres Santos, Luis Alcala, Manuel Desco, Leon Cohen

Proceedings Volume 4788, (2002) https://doi.org/10.1117/12.451665

KEYWORDS: Image segmentation, Bacteria, Colorimetry, Image processing, Luminescence, Optical filters, Color image processing, Feature extraction, Mathematical morphology, Fuzzy logic

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Proceedings Article | 25 July 2002 Paper

Generalization of group velocity and group acceleration

Leon Cohen

Proceedings Volume 4726, (2002) https://doi.org/10.1117/12.477013

KEYWORDS: Dispersion, Wave propagation, Quantum mechanics, Automatic target recognition, Differential equations, Lead, Quantum efficiency, Modulation

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Proceedings Article | 19 December 2001 Paper

Wigner distribution for radar waves incident upon a metallic half-space

David Hughes, Leon Cohen, Bruce Suter

Proceedings Volume 4508, (2001) https://doi.org/10.1117/12.450784

KEYWORDS: Metals, Wave propagation, Radio propagation, Radar, Refraction, Reflection, Interfaces, Electromagnetism, Electromagnetic radiation, Signal attenuation

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Proceedings Article | 5 December 2001 Paper

Transforming convolution and correlation

Leon Cohen, Alan Lindsey, Bruce Suter

Proceedings Volume 4478, (2001) https://doi.org/10.1117/12.449703

KEYWORDS: Convolution, Electronic filtering, Integral transforms, Wavelets, Analytical research, Roads, Signal processing, Image processing, Inspection

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Proceedings Article | 5 December 2001 Paper

Further experimental results on the speech-hearing connection

S. Umesh, Douglas Nelson, Leon Cohen

Proceedings Volume 4478, (2001) https://doi.org/10.1117/12.449700

KEYWORDS: Databases, Composites, Fourier transforms, Defense and security, Physics, Transmitters, Receivers, Associative arrays, Computer programming, Ear

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Proceedings Article | 20 November 2001 Paper

Solution of differential equations using the smoothed Wigner distribution

Lorenzo Galleani, Leon Cohen

Proceedings Volume 4474, (2001) https://doi.org/10.1117/12.448638

KEYWORDS: Differential equations, Ordinary differential equations, Standards development, Smoothing, Convolution, Fourier transforms, Time-frequency analysis, Signal processing, Partial differential equations, Einsteinium

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Proceedings Article | 20 November 2001 Paper

Wigner distribution and pulse propagation

Leon Cohen

Proceedings Volume 4474, (2001) https://doi.org/10.1117/12.448655

KEYWORDS: Particles, Wave propagation, Dispersion, Lead, Mechanics, Partial differential equations, Signal processing, Astatine

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Proceedings Article | 1 November 2001 Paper

Estimating the instantaneous power spectrum of an x-ray binary system

Lorenzo Galleani, Leon Cohen, Douglas Nelson, Jeffrey Scargle

Proceedings Volume 4477, (2001) https://doi.org/10.1117/12.447165

KEYWORDS: Time-frequency analysis, Signal processing, Electronic filtering, Interference (communication), Optical filters, Filtering (signal processing), X-rays, Binary data, Nonlinear filtering, Linear filtering

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Proceedings Article | 26 March 2001 Paper

Local particle view of a propagating pulse

Leon Cohen

Proceedings Volume 4391, (2001) https://doi.org/10.1117/12.421203

KEYWORDS: Particles, Wave propagation, Visualization, Mathematical modeling, Partial differential equations, Dispersion, Differential equations, Berkelium, Mechanics, Motion models

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Proceedings Article | 18 December 2000 Paper

Higher-order dispersion in a propagating pulse

Leon Cohen, Bruce Suter

Proceedings Volume 4142, (2000) https://doi.org/10.1117/12.410553

KEYWORDS: Dispersion, Wave propagation, Radar, Fiber optics, Roads, Astatine

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Proceedings Article | 4 December 2000 Paper

Classification of transforms

Leon Cohen, Alan Lindsey, Bruce Suter

Proceedings Volume 4119, (2000) https://doi.org/10.1117/12.408626

KEYWORDS: Transform theory, Convolution, Wavelets, Analytical research, Roads, Signal processing, Image processing

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Proceedings Article | 4 December 2000 Paper

High-resolution formant estimation and its application in frequency scaling of speech

Douglas Nelson, S. Umesh, Leon Cohen

Proceedings Volume 4119, (2000) https://doi.org/10.1117/12.408613

KEYWORDS: Fourier transforms, Electronic filtering, Statistical analysis, Error analysis, Defense and security, Physics, Wavelets, Signal processing, Image processing, Factor analysis

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Proceedings Article | 13 November 2000 Paper

Wigner equations of motion for classical systems

Lorenzo Galleani, Leon Cohen

Proceedings Volume 4116, (2000) https://doi.org/10.1117/12.406530

KEYWORDS: Ordinary differential equations, Partial differential equations, Oscillators, Fourier transforms, Differential equations, Acoustics, Electromagnetism, Signal processing, Switches

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Proceedings Article | 2 November 2000 Paper

Power cepstral image analysis through the scale transform

Jose Pech-Pacheco, Gabriel Cristobal, Josue Alvarez-Borrego, Leon Cohen

Proceedings Volume 4113, (2000) https://doi.org/10.1117/12.405864

KEYWORDS: Image registration, Particles, Fourier transforms, Image processing, Image analysis, Image restoration, Current controlled current source, Image fusion, Digital filtering, Microscopy

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Proceedings Article | 2 November 1999 Paper

Denoising using time-frequency and image processing methods

Douglas Nelson, Gabriel Cristobal, Vitaly Kober, Fehret Cakrak, Patrick Loughlin, Leon Cohen

Proceedings Volume 3807, (1999) https://doi.org/10.1117/12.367673

KEYWORDS: Interference (communication), Electronic filtering, Fourier transforms, Time-frequency analysis, Frequency modulation, Fermium, Transform theory, Signal processing, Optical filters, Filtering (signal processing)

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Proceedings Article | 2 November 1999 Paper

Wavelet moments and time-frequency analysis

Leon Cohen

Proceedings Volume 3807, (1999) https://doi.org/10.1117/12.367660

KEYWORDS: Wavelets, Wavelet transforms, Time-frequency analysis, Fourier transforms, Distortion, Physics, Astronomy, Signal analyzers, Wave propagation

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Proceedings Article | 2 November 1999 Paper

Application of time-frequency methods to sound-quality analysis in automobiles

Mark French, Leon Cohen, Patrick Loughlin

Proceedings Volume 3807, (1999) https://doi.org/10.1117/12.367671

KEYWORDS: Time-frequency analysis, Manufacturing, Signal processing, Fourier transforms, Analytical research, Interference (communication), Assembly tolerances, Roads, Physics, Electrical engineering

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Proceedings Article | 26 October 1999 Paper

Scale-transform-based features for application in speech recognition

S. Umesh, Leon Cohen, Douglas Nelson

Proceedings Volume 3813, (1999) https://doi.org/10.1117/12.366828

KEYWORDS: Speech recognition, Fourier transforms, Factor analysis, Signal processing, Chlorine, Defense and security, Wavelets, Image processing, Performance modeling, Ear

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Proceedings Article | 19 October 1998 Paper

Warping functions in speech

S. Umesh, Leon Cohen, Douglas Nelson

Proceedings Volume 3458, (1998) https://doi.org/10.1117/12.328137

KEYWORDS: Fermium, Frequency modulation, Transform theory, Fourier transforms, Receivers, Signal to noise ratio, Ear, Signal analyzers, Filtering (signal processing), Acoustics

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Proceedings Article | 2 October 1998 Paper

Generalization of the autocorrelation function

Leon Cohen

Proceedings Volume 3461, (1998) https://doi.org/10.1117/12.325671

KEYWORDS: Time-frequency analysis, Fourier transforms, Signal processing, Astatine

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Proceedings Article | 18 September 1998 Paper

Probability densitites and pulses

Leon Cohen

Proceedings Volume 3371, (1998) https://doi.org/10.1117/12.323872

KEYWORDS: Probability theory, Wave propagation, Fourier transforms, Convolution, Radon

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Proceedings Article | 30 October 1997 Paper

Improvements in scale-transform-based features for speech analysis

Srinivasan Umesh, Leon Cohen, Douglas Nelson

Proceedings Volume 3169, (1997) https://doi.org/10.1117/12.292805

KEYWORDS: Acoustics, Databases

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Proceedings Article | 24 October 1997 Paper

Time-frequency representations of astronomical signals

Ashwin Rao, Leon Cohen, Jeffrey Scargle

Proceedings Volume 3162, (1997) https://doi.org/10.1117/12.292742

KEYWORDS: Time-frequency analysis, Astronomy, Signal analyzers, Electronic filtering, Optical filters, Bandpass filters, Fourier transforms, Signal processing, Iterated function systems, Strontium

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Proceedings Article | 24 October 1997 Paper

Instantaneous frequency of a propogating pulse

Leon Cohen

Proceedings Volume 3162, (1997) https://doi.org/10.1117/12.284195

KEYWORDS: Wave propagation, Signal attenuation, Frequency modulation, Lithium, Time-frequency analysis

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Proceedings Article | 14 October 1997 Paper

Global and local translation and magnification

S. Umesh, Aibing Rao, Gabriel Cristobal, Leon Cohen, Jos van Deemter

Proceedings Volume 3167, (1997) https://doi.org/10.1117/12.290274

KEYWORDS: Fourier transforms

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Proceedings Article | 23 June 1997 Paper

Characterization of transients

Leon Cohen

Proceedings Volume 3069, (1997) https://doi.org/10.1117/12.277095

KEYWORDS: Wave propagation, Time-frequency analysis, Fourier transforms, Dispersion, Chromium, Astatine, Information operations, Radar, Optical fibers

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Proceedings Article | 23 October 1996 Paper

Psychoacoustic frequency scales versus frequency warping in scale cepstrum

Srinivasan Umesh, Leon Cohen, Nenad Marinovic, Douglas Nelson

Proceedings Volume 2825, (1996) https://doi.org/10.1117/12.255264

KEYWORDS: Filtering (signal processing), Speech recognition, Ear, Signal processing, Databases, Fourier transforms, Linear filtering, Feature extraction, Detection and tracking algorithms, Optical filters

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Proceedings Article | 22 October 1996 Paper

Scale in images

Gabriel Cristobal, Leon Cohen

Proceedings Volume 2846, (1996) https://doi.org/10.1117/12.255438

KEYWORDS: Fourier transforms, Cameras, Optical filters, Denoising, Signal processing, Linear filtering, Image resolution, Fractal analysis, Vibrometry, Multidimensional signal processing

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Proceedings Article | 22 October 1996 Paper

Topics in time-frequency representations

Leon Cohen

Proceedings Volume 2846, (1996) https://doi.org/10.1117/12.255436

KEYWORDS: Time-frequency analysis, Spatial frequencies, Transform theory, Wave propagation, Information operations, Fourier transforms, Space operations, Silicon, Laser induced plasma spectroscopy, Oxygen

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Proceedings Article | 1 September 1995 Paper

Scale-invariant speech analysis via joint time-frequency-scale processing

Leon Cohen, Nenad Marinovic, Srinivasan Umesh, Douglas Nelson

Proceedings Volume 2569, (1995) https://doi.org/10.1117/12.217607

KEYWORDS: Fourier transforms, Signal processing, Ear, Modulation, Acoustics, Time-frequency analysis, Signal attenuation, Copper, Signal generators, Defense and security

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Proceedings Article | 7 June 1995 Paper

Classification of digital modulation types

Nenad Marinovic, Douglas Nelson, Leon Cohen, Srinivasan Umesh

Proceedings Volume 2563, (1995) https://doi.org/10.1117/12.211392

KEYWORDS: Modulation, Signal processing, Signal to noise ratio, Phase shift keying, Interference (communication), Fourier transforms, Error analysis, Silicon, Signal detection, Signal analyzers

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Proceedings Article | 7 June 1995 Paper

Uncertainty principles of the short-time Fourier transform

Leon Cohen

Proceedings Volume 2563, (1995) https://doi.org/10.1117/12.211427

KEYWORDS: Fourier transforms, Time-frequency analysis, Surface plasmons, Convolution, Physics, Analytical research, Astatine, Argon

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Proceedings Article | 28 October 1994 Paper

Transformation of operators and scale

Leon Cohen

Proceedings Volume 2296, (1994) https://doi.org/10.1117/12.190870

KEYWORDS: Matrices, Radon, Fourier transforms, Organic light emitting diodes, Information operations, Time-frequency analysis

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Proceedings Article | 11 October 1994 Paper

Scale and harmonic-type signals

Nenad Marinovic, Leon Cohen, Srinivasan Umesh

Proceedings Volume 2303, (1994) https://doi.org/10.1117/12.188790

KEYWORDS: Fourier transforms, Modulation, Signal processing, Amplitude modulation, Frequency modulation, Time-frequency analysis, Convolution, Fermium, Electromagnetic radiation, Signal analyzers

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Proceedings Article | 30 November 1992 Paper

Convolution, filtering, linear systems, the Wiener-Khinchin theorem: generalizations

Leon Cohen

Proceedings Volume 1770, (1992) https://doi.org/10.1117/12.130944

KEYWORDS: Transform theory, Convolution, Probability theory, Fourier transforms, Linear filtering, Electronic filtering, Detection theory, Signal analysis, Information technology, Matrices

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Proceedings Article | 1 December 1991 Paper

General approach for obtaining joint representations in signal analysis and an application to scale

Leon Cohen

Proceedings Volume 1566, (1991) https://doi.org/10.1117/12.49816

KEYWORDS: Signal processing, Signal analysis, Silicon, Fourier transforms, Electroluminescence, Differential equations, Quantum optics, Chromium, Nomenclature, Aluminum

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Proceedings Article | 1 November 1990 Paper

Distributions concentrated along the instantaneous frequency

Leon Cohen

Proceedings Volume 1348, (1990) https://doi.org/10.1117/12.23472

KEYWORDS: Frequency modulation, Modulation, Fermium, Phase shift keying, Amplitude modulation, Time-frequency analysis, Algorithm development, Phase modulation, Signal analysis, Tellurium

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Showing 5 of 87 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 6 June 2007

Noise and Fluctuations in Photonics, Quantum Optics, and Communications

Conference Committee Involvement (31)

Automatic Target Recognition XXXV

14 April 2025 | Orlando, Florida, United States

Automatic Target Recognition XXXIV

22 April 2024 | National Harbor, Maryland, United States

Automatic Target Recognition XXXIII

1 May 2023 | Orlando, Florida, United States

Automatic Target Recognition XXXII

4 April 2022 | Orlando, Florida, United States

Automatic Target Recognition XXXI

12 April 2021 | Online Only, Florida, United States

Automatic Target Recognition XXX

27 April 2020 | Online Only, California, United States

Automatic Target Recognition XXIX

15 April 2019 | Baltimore, MD, United States

Automatic Target Recognition XXVIII

16 April 2018 | Orlando, FL, United States

Automatic Target Recognition XXVII

10 April 2017 | Anaheim, CA, United States

Automatic Target Recognition XXVI

18 April 2016 | Baltimore, MD, United States

Automatic Target Recognition XXV

20 April 2015 | Baltimore, MD, United States

Automatic Target Recognition XXIV

5 May 2014 | Baltimore, MD, United States

Automatic Target Recognition XXIII

29 April 2013 | Baltimore, Maryland, United States

Automatic Target Recognition XXII

23 April 2012 | Baltimore, Maryland, United States

Automatic Target Recognition XXI

25 April 2011 | Orlando, Florida, United States

Automatic Target Recognition XX

5 April 2010 | Orlando, Florida, United States

Advanced Signal Processing Algorithms, Architectures, and Implementations XIX

2 August 2009 | San Diego, California, United States

Automatic Target Recognition XIX

13 April 2009 | Orlando, Florida, United States

Advanced Signal Processing Algorithms, Architectures, and Implementations XVIII

10 August 2008 | San Diego, California, United States

Automatic Target Recognition XVIII

19 March 2008 | Orlando, Florida, United States

Advanced Signal Processing Algorithms, Architectures, and Implementations XVII

26 August 2007 | San Diego, California, United States

Noise and Fluctuations in Photonics, Quantum Optics, and Communications

21 May 2007 | Florence, Italy

Automatic Target Recognition XVII

10 April 2007 | Orlando, Florida, United States

Advanced Signal Processing Algorithms, Architectures, and Implementations XVI

15 August 2006 | San Diego, California, United States

Automatic Target Recognition XVI

18 April 2006 | Orlando (Kissimmee), Florida, United States

Advanced Signal Processing Algorithms, Architectures, and Implementations XV

2 August 2005 | San Diego, California, United States

Automatic Target Recognition XV

29 March 2005 | Orlando, Florida, United States

Advanced Signal Processing Algorithms, Architectures, and Implementations XIV

4 August 2004 | Denver, Colorado, United States

Automatic Target Recognition XIV

13 April 2004 | Orlando, Florida, United States

Advanced Signal Processing Algorithms, Architectures, and Implementations XIII

6 August 2003 | San Diego, California, United States

Automatic Target Recognition XIII

22 April 2003 | Orlando, Florida, United States

Showing 5 of 31 Conference Committees

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