Dr. Georges R. Fournier Profile

Dr. Georges R. Fournier

Defense Scientist at Defence Research and Development Canada Valcartier

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 25 May 2018 Presentation + Paper

Presentation + Paper

Sea-ice detection for autonomous underwater vehicles and oceanographic lagrangian platforms by continuous-wave laser polarimetry

José Lagunas, Claudie Marec, Édouard Leymarie , Christophe Penkerc'h, Eric Rehm, Pierre Desaulniers, Denis Brousseau, Patrick Larochelle, Gilles Roy, Georges Fournier, Simon Thibault, Marcel Babin

Proceedings Volume 10631, 106310W (2018) https://doi.org/10.1117/12.2309571

KEYWORDS: Sensors, Laser sources, Continuous wave operation, Polarization, Backscatter, Receivers, Scattering, Ocean optics, Laser scattering, Signal detection

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Proceedings Article | 23 May 2014 Paper

Paper

Overview of a hybrid underwater camera system

Philip Church, Weilin Hou, Georges Fournier, Fraser Dalgleish, Derek Butler, Sergio Pari, Michael Jamieson, David Pike

Proceedings Volume 9111, 91110O (2014) https://doi.org/10.1117/12.2053365

KEYWORDS: Cameras, Sensors, Signal attenuation, Imaging systems, Navigation systems, Image enhancement, Control systems, System integration, Visibility, Pulsed laser operation

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Proceedings Article | 23 May 2014 Paper

Paper

Implications of a new phase function for autonomous underwater imaging

G. Fournier, V. Sanjuan-Calzado, C. Trees

Proceedings Volume 9111, 911119 (2014) https://doi.org/10.1117/12.2053878

KEYWORDS: Scattering, Particles, Refraction, Backscatter, Diffraction, Light scattering, Water, LIDAR, Optical properties, Underwater imaging

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Proceedings Article | 17 September 2013 Paper

Paper

Development of an underwater fiber-optic lidar for the characterization of sea water and ice properties

Gilles Roy, Pierre Mathieu, Xiaoying Cao, Alain Cinq-Mars, Simon Roy, Georges Fournier, Claudie Marec, Guislain Bécu

Proceedings Volume 8872, 88720I (2013) https://doi.org/10.1117/12.2021528

KEYWORDS: LIDAR, Head, Water, Telescopes, Laser sources, Polarization, Optical fibers, Reflectivity, Sensors, Fiber optics

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Proceedings Article | 10 September 2011 Paper

Paper

Target discrimination of man-made objects using passive polarimetric signatures acquired in the visible and infrared spectral bands

Daniel Lavigne, Mélanie Breton, Georges Fournier, Jean-François Charette, Mario Pichette, Vincent Rivet, Anne-Pier Bernier

Proceedings Volume 8160, 816007 (2011) https://doi.org/10.1117/12.894055

KEYWORDS: Polarimetry, Polarization, Infrared radiation, Infrared signatures, Visible radiation, Infrared imaging, Imaging systems, Target detection, Sensors, Image processing

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Proceedings Article | 11 May 2009 Paper

Paper

Development of performance metrics to characterize the degree of polarization of man-made objects using passive polarimetric images

Daniel Lavigne, Mélanie Breton, Georges Fournier, Mario Pichette, Vincent Rivet

Proceedings Volume 7336, 73361A (2009) https://doi.org/10.1117/12.819020

KEYWORDS: Polarization, Polarimetry, Optical spheres, Sensors, Infrared radiation, Aluminum, Infrared imaging, Visible radiation, Mid-IR, Infrared sensors

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Proceedings Article | 22 April 2009 Paper

Paper

A new passive polarimetric imaging system collecting polarization signatures in the visible and infrared bands

Daniel Lavigne, Mélanie Breton, Georges Fournier, Mario Pichette, Vincent Rivet

Proceedings Volume 7300, 730010 (2009) https://doi.org/10.1117/12.819011

KEYWORDS: Polarization, Sensors, Polarimetry, Mid-IR, Imaging systems, Cameras, Infrared radiation, Infrared imaging, Visible radiation, Long wavelength infrared

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Proceedings Article | 24 September 2007 Paper

Paper

Imagery-derived modulation transfer function and its applications for underwater imaging

Weilin Hou, Alan Weidemann, Deric Gray, Georges Fournier

Proceedings Volume 6696, 669622 (2007) https://doi.org/10.1117/12.734953

KEYWORDS: Modulation transfer functions, Scattering, Imaging systems, Absorption, Point spread functions, Cameras, Optical properties, Polarization, Spatial frequencies, Signal to noise ratio

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The main challenge working with underwater imagery results from both rapid decay of signals due to absorption, which leads to poor signal to noise returns, and the blurring caused by strong scattering by the water itself and constituents within, especially particulates. The modulation transfer function (MTF) of an optical system gives the detailed and precise information regarding the system behavior. Underwater imageries can be better restored with the knowledge of the system MTF or the point spread function (PSF), the Fourier transformed equivalent, extending the performance range as well as the information retrieval from underwater electro-optical system. This is critical in many civilian and military applications, including target and especially mine detection, search and rescue, and diver visibility. This effort utilizes test imageries obtained by the Laser Underwater Camera Imaging Enhancer (LUCIE) from Defense Research and Development Canada (DRDC), during an April-May 2006 trial experiment in Panama City, Florida. Imaging of a standard resolution chart with various spatial frequencies were taken underwater in a controlled optical environment, at varying distances. In-water optical properties during the experiment were measured, which included the absorption and attenuation coefficients, particle size distribution, and volume scattering function. Resulting images were preprocessed to enhance signal to noise ratio by averaging multiple frames, and to remove uneven illumination at target plane. The MTF of the medium was then derived from measurement of above imageries, subtracting the effect of the camera system. PSFs converted from the measured MTF were then used to restore the blurred imageries by different deconvolution methods. The effects of polarization from source to receiver on resulting MTFs were examined and we demonstrate that matching polarizations do enhance system transfer functions. This approach also shows promise in deriving medium optical properties including absorption and attenuation.

Proceedings Article | 13 April 2007 Paper

Paper

Backscatter corrected Fournier-Forand phase function for remote sensing and underwater imaging performance evaluation

G. Fournier

Proceedings Volume 6615, 66150N (2007) https://doi.org/10.1117/12.740463

KEYWORDS: Particles, Refraction, Scattering, Reflectivity, Light scattering, Reflection, Diffraction, Backscatter, Water, Remote sensing

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Proceedings Article | 19 May 2005 Paper

Paper

In harbor underwater threat detection/identification using active imaging

Alan Weidemann, Georges Fournier, Luc Forand, Pierre Mathieu

Proceedings Volume 5780, (2005) https://doi.org/10.1117/12.603601

KEYWORDS: Cameras, Imaging systems, Scattering, Image enhancement, Polarization, Zoom lenses, Eye, Absorption, Visibility, Particles

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Proceedings Article | 5 September 2000 Paper

Paper

Range-gated intensified spectrographic imager: an instrument for active hyperspectral imaging

Jean-Robert Simard, Pierre Mathieu, Georges Fournier, Vincent Larochelle, Stephen Babey

Proceedings Volume 4035, (2000) https://doi.org/10.1117/12.397791

KEYWORDS: Cameras, Signal to noise ratio, Hyperspectral imaging, Charge-coupled devices, Signal detection, Imaging systems, Calibration, Luminescence, Mining, Quantum efficiency

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Proceedings Article | 28 October 1999 Paper

Paper

Particle distributions and index of refraction estimation for Canadian waters

J. Luc Forand, Georges Fournier

Proceedings Volume 3761, (1999) https://doi.org/10.1117/12.366486

KEYWORDS: Scattering, Particles, Absorption, Water, Refraction, Iris recognition, Light scattering, Sensors, Quartz, Integration

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Proceedings Article | 28 October 1999 Paper

Paper

Computer-based underwater imaging analysis

Georges Fournier, Miroslaw Jonasz

Proceedings Volume 3761, (1999) https://doi.org/10.1117/12.366488

KEYWORDS: Scattering, Light scattering, Imaging systems, Point spread functions, Laser scattering, Photons, Modulation transfer functions, Absorption, Systems modeling, Underwater imaging

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Proceedings Article | 6 February 1997 Paper

Paper

Approximation to beam propagation in ocean water

Georges Fournier

Proceedings Volume 2963, (1997) https://doi.org/10.1117/12.266469

KEYWORDS: Scattering, Absorption, Water, Laser scattering, Systems modeling, Mie scattering, Refraction, Laser beam propagation, Beam propagation method, Diffraction

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Proceedings Article | 26 October 1994 Paper

Paper

Analytic phase function for ocean water

Georges Fournier, J. Luc Forand

Proceedings Volume 2258, (1994) https://doi.org/10.1117/12.190063

KEYWORDS: Particles, Scattering, Diffraction, Mie scattering, Water, Integration, Refraction, Optical spheres, Ocean optics, Analytical research

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Proceedings Article | 26 October 1994 Paper

Paper

Underwater laser imaging system with large field of view

Georges Fournier, Deni Bonnier, J. Luc Forand

Proceedings Volume 2258, (1994) https://doi.org/10.1117/12.190083

KEYWORDS: Scattering, Imaging systems, Absorption, Cameras, Laser scattering, Zoom lenses, Ocean optics, Laser systems engineering, Laser imaging, Performance modeling

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Proceedings Article | 26 October 1994 Paper

Paper

Data base of oceanic optical properties

Georges Fournier, Miroslaw Jonasz

Proceedings Volume 2258, (1994) https://doi.org/10.1117/12.190102

KEYWORDS: Particles, Scattering, Ocean optics, Optical properties, Backscatter, Diffraction, Refraction, Databases, Data modeling, Light scattering

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SPIE Journal Paper | 1 September 1993

Range-gated underwater laser imaging system

Georges Fournier, Deni Bonnier, J. Luc Forand, Paul Pace

OE, Vol. 32, Issue 09, (September 1993) https://doi.org/10.1117/12.10.1117/12.143954

KEYWORDS: Scattering, Laser scattering, Imaging systems, Absorption, Cameras, Laser systems engineering, Water, Laser imaging, Pulsed laser operation, Image enhancement

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Proceedings Article | 31 December 1992 Paper

Paper

LUCIE ROV mounted laser imaging system

Georges Fournier, Deni Bonnier, J. Luc Forand, Paul Pace

Proceedings Volume 1750, (1992) https://doi.org/10.1117/12.140673

KEYWORDS: Imaging systems, Scattering, Cameras, Water, Laser systems engineering, Absorption, Ocean optics, Laser scattering, Zoom lenses, Image processing

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Proceedings Article | 31 December 1992 Paper

Paper

NEARSCAT full-spectrum narrow forward-angle transmissometer-nephelometer

Georges Fournier, J. Luc Forand, G. Pelletier, Paul Pace

Proceedings Volume 1750, (1992) https://doi.org/10.1117/12.140643

KEYWORDS: Scattering, Absorption, Ocean optics, Light scattering, Iris recognition, Optical properties, Laser scattering, Amplifiers, Calibration, Monochromators

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Proceedings Article | 22 December 1992 Paper

Paper

Experimental data on near-surface refraction effects at optical wavelengths

Denis Dion, J. Luc Forand, Georges Fournier, Paul Pace

Proceedings Volume 1749, (1992) https://doi.org/10.1117/12.138842

KEYWORDS: Refraction, Ocean optics, Water, Lamps, Atmospheric optics, Wind measurement, Humidity, Atmospheric modeling, Temperature metrology, Meteorology

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Showing 5 of 21 publications

Conference Committee Involvement (7)

Ocean Sensing and Monitoring III

26 April 2011 | Orlando, Florida, United States

Ocean Sensing and Monitoring II

5 April 2010 | Orlando, Florida, United States

Atmospheric Propagation VI

14 April 2009 | Orlando, Florida, United States

Ocean Sensing and Monitoring

13 April 2009 | Orlando, Florida, United States

Photonics for Port and Harbor Security II

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

Showing 5 of 7 Conference Committees

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