Mr. Francois Blais Profile

Francois Blais

Senior Research Officer at National Research Council Canada

SPIE Involvement:

Author

Publications (34)

SPIE Journal Paper | 12 March 2012

Lateral resolution challenges for triangulation-based three-dimensional imaging systems

David MacKinnon, Jean-Angelo Beraldin, Luc Cournoyer, Michel Picard, Francois Blais

OE, Vol. 51, Issue 02, 021111, (March 2012) https://doi.org/10.1117/12.10.1117/1.OE.51.2.021111

KEYWORDS: Imaging systems, Image resolution, Stereoscopy, 3D image processing, 3D modeling, Sensors, Spatial resolution, Laser systems engineering, Systems modeling, Optical engineering

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SPIE Journal Paper | 1 January 2010

Measurement quality metrics for rapid laser range scanning

David MacKinnon, Francois Blais, Victor Aitken

JEI, Vol. 19, Issue 01, 011004, (January 2010) https://doi.org/10.1117/12.10.1117/1.3267094

KEYWORDS: Image quality, Quality measurement, Laser range finders, Reflectivity, Composites, Scanners, Data processing, Image processing, Solid modeling, Signal detection

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Proceedings Article | 8 September 2009 Paper

Proposed traceable structural resolution protocols for 3D imaging systems

David MacKinnon, J.-Angelo Beraldin, Luc Cournoyer, Benjamin Carrier, François Blais

Proceedings Volume 7447, 744704 (2009) https://doi.org/10.1117/12.824458

KEYWORDS: Computer aided design, 3D scanning, Imaging systems, Image resolution, Laser scanners, Stereoscopy, Solid modeling, Data modeling, Spatial resolution, 3D metrology

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Proceedings Article | 19 January 2009 Paper

Evaluating laser range scanner lateral resolution in 3D metrology

David MacKinnon, J. Angelo Beraldin, Luc Cournoyer, Francois Blais

Proceedings Volume 7239, 72390P (2009) https://doi.org/10.1117/12.805868

KEYWORDS: Laser range finders, Spatial resolution, Scanners, Strontium, Sensors, 3D metrology, Laser systems engineering, Image resolution, 3D scanning, Imaging systems

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Proceedings Article | 19 January 2009 Paper

Proposed procedure for a distance protocol in support of ASTM-E57 standards activities on 3D imaging

J.-A. Beraldin, L. Cournoyer, M. Picard, F. Blais

Proceedings Volume 7239, 72390S (2009) https://doi.org/10.1117/12.814926

KEYWORDS: Imaging systems, Distance measurement, Standards development, Stereoscopy, Laser scanners, Optical spheres, 3D imaging standards, 3D image processing, 3D metrology, Manufacturing

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Proceedings Article | 29 August 2008 Paper

3D imaging from theory to practice: the Mona Lisa story

Francois Blais, Luc Cournoyer, J.-Angelo Beraldin, Michel Picard

Proceedings Volume 7060, 70600L (2008) https://doi.org/10.1117/12.795456

KEYWORDS: 3D modeling, Stereoscopy, Imaging systems, 3D image processing, 3D acquisition, Laser scanners, 3D scanning, Head, RGB color model, 3D metrology

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SPIE Journal Paper | 1 July 2008 Open Access

Review of measurement quality metrics for range imaging

David MacKinnon, Victor Aitken, Francois Blais

JEI, Vol. 17, Issue 03, 033003, (July 2008) https://doi.org/10.1117/12.10.1117/1.2955245

KEYWORDS: Quality measurement, Reflectivity, Laser range finders, Scanners, Spatial resolution, Image quality, Sensors, Laser scanners, Speckle, 3D scanning

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Proceedings Article | 25 February 2008 Paper

Using quality metrics with laser range scanners

David MacKinnon, Victor Aitken, Francois Blais

Proceedings Volume 6805, 68050G (2008) https://doi.org/10.1117/12.766522

KEYWORDS: Image quality, Scanners, Reflectivity, Composites, Quality measurement, Laser range finders, Image processing, Raster graphics, Data modeling, Laser systems engineering

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Proceedings Article | 29 January 2007 Paper

Traceable 3D imaging metrology

J.-Angelo Beraldin, Marc Rioux, Luc Cournoyer, Francois Blais, Michel Picard, Jim Pekelsky

Proceedings Volume 6491, 64910B (2007) https://doi.org/10.1117/12.698381

KEYWORDS: 3D metrology, Imaging systems, 3D modeling, Stereoscopy, 3D image processing, Laser scanners, 3D scanning, Standards development, 3D imaging standards, Metrology

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Proceedings Article | 29 January 2007 Paper

More than a poplar plank: the shape and subtle colors of the masterpiece Mona Lisa by Leonardo

François Blais, John Taylor, Luc Cournoyer, Michel Picard, Louis Borgeat, Guy Godin, J.-Angelo Beraldin, Marc Rioux, Christian Lahanier, Bruno Mottin

Proceedings Volume 6491, 649106 (2007) https://doi.org/10.1117/12.705411

KEYWORDS: 3D modeling, 3D scanning, Laser scanners, 3D image processing, Stereoscopy, Infrared radiation, Infrared photography, Infrared imaging, Scanners, Head

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Proceedings Article | 12 August 2005 Paper

NRC's 3D technology for museum and heritage applications

J. Taylor, F. Blais, J.-A. Beraldin, G. Godin, L. Borgeat, S. El-Hakim, E. Paquet, L. Cournoyer, M. Picard, M. Rioux, C. Lahanier, G. Aitken

Proceedings Volume 5857, 585708 (2005) https://doi.org/10.1117/12.624158

KEYWORDS: 3D modeling, Cameras, Data modeling, Laser scanners, RGB color model, Calibration, 3D displays, 3D image processing, Imaging systems, Stereoscopy

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SPIE Journal Paper | 1 January 2004

Review of 20 years of range sensor development

Francois Blais

JEI, Vol. 13, Issue 01, (January 2004) https://doi.org/10.1117/12.10.1117/1.1631921

KEYWORDS: Sensors, Laser scanners, 3D scanning, Imaging systems, 3D image processing, Scanners, Head, 3D modeling, Inspection, Cameras

Proceedings Article | 10 January 2003 Paper

Review of 20 years of range sensor development

Francois Blais

Proceedings Volume 5013, (2003) https://doi.org/10.1117/12.473116

KEYWORDS: Sensors, Laser scanners, 3D scanning, Head, Scanners, 3D metrology, Cameras, Imaging systems, Modulation, 3D image processing

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Proceedings Article | 1 July 2002 Paper

Imaging and tracking elements of the International Space Station using a 3D autosynchronized scanner

Claire Samson, Chad English, Adam DesLauriers, Iain Christie, Francois Blais

Proceedings Volume 4714, (2002) https://doi.org/10.1117/12.472603

KEYWORDS: Liquid crystals, 3D image processing, 3D modeling, 3D scanning, Light sources and illumination, Laser scanners, 3D acquisition, Data modeling, Sensors, Target acquisition

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Proceedings Article | 8 March 2002 Paper

MDSP: a modular DSP architecture for a real-time 3D laser range sensor

David Green, Francois Blais, J. Beraldin, Luc Cournoyer

Proceedings Volume 4661, (2002) https://doi.org/10.1117/12.460176

KEYWORDS: Digital signal processing, Sensors, Charge-coupled devices, Signal processing, Clocks, Prototyping, Operating systems, Mirrors, CCD image sensors, Computer architecture

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Proceedings Article | 22 December 2000 Paper

Comparison of pose estimation methods of a 3D laser tracking system using triangulation and photogrammetry techniques

Francois Blais, J. Beraldin, Sabry El-Hakim, Luc Cournoyer

Proceedings Volume 4309, (2000) https://doi.org/10.1117/12.410874

KEYWORDS: Laser scanners, Cameras, Laser systems engineering, 3D scanning, Scanners, Video, 3D acquisition, Sun, Target detection, Photogrammetry

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Proceedings Article | 5 September 2000 Paper

Range error analysis of an integrated time-of-flight, triangulation, and photogrammetric 3D laser scanning system

Francois Blais, J. Beraldin, Sabry El-Hakim

Proceedings Volume 4035, (2000) https://doi.org/10.1117/12.397796

KEYWORDS: Laser scanners, Laser systems engineering, 3D scanning, Sun, Sensors, Cameras, 3D acquisition, Signal to noise ratio, Signal detection, Scanners

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Proceedings Article | 7 July 2000 Paper

Integration of a tracking laser range camera with the photogrammetry-based space vision system

Francois Blais, J. Beraldin, Luc Cournoyer, Iain Christie, R. Serafini, K. Mason, S. McCarthy, C. Goodall

Proceedings Volume 4025, (2000) https://doi.org/10.1117/12.391665

KEYWORDS: Cameras, Laser scanners, Liquid crystals, Video, Imaging systems, Laser systems engineering, 3D acquisition, Light sources and illumination, Target detection, Sun

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Proceedings Article | 16 March 2000 Paper

High-speed three-dimensional laser sensor

Liviu Bursanescu, Mihaela Bursanescu, Maher Hamdi, Francois Blais, David Green

Proceedings Volume 3958, (2000) https://doi.org/10.1117/12.380045

KEYWORDS: Sensors, Roads, Detection and tracking algorithms, CCD image sensors, Video, Projection systems, Data acquisition, Image sensors, Computer simulations, Inspection

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Proceedings Article | 16 March 2000 Paper

ShapeGrabber FootScanner: a low cost high accuracy 3D system for the acquisition of human feet

Francois Blais, Joel Bisson, Steve Williams, Nancy Robertson, Serge Rozin, Andrew Nelson

Proceedings Volume 3958, (2000) https://doi.org/10.1117/12.380039

KEYWORDS: Sensors, Head, Ranging, Calibration, Charge-coupled devices, Target detection, CCD image sensors, 3D acquisition, Reliability, Tolerancing

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SPIE Journal Paper | 1 January 2000

Eye-safe digital 3-D sensing for space applications

J. Beraldin, Francois Blais, Marc Rioux, Luc Cournoyer, Denis Laurin, Steve MacLean

OE, Vol. 39, Issue 01, (January 2000) https://doi.org/10.1117/12.10.1117/1.602352

KEYWORDS: Cameras, Sensors, Photodiodes, Three dimensional sensing, 3D surface sensing, 3D modeling, Calibration, Imaging systems, Laser scanners, Optical engineering

Proceedings Article | 28 May 1999 Paper

Three-dimensional tracking and imaging laser scanner for space operations

Denis Laurin, J. Beraldin, Francois Blais, Marc Rioux, Luc Cournoyer

Proceedings Volume 3707, (1999) https://doi.org/10.1117/12.351351

KEYWORDS: Mirrors, Scanners, 3D scanning, Laser scanners, Space operations, 3D acquisition, Sensors, 3D image processing, Imaging systems, Light sources and illumination

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Proceedings Article | 22 July 1997 Paper

Short- and medium-range 3D sensing for space applications

J. Beraldin, Francois Blais, Marc Rioux, Luc Cournoyer, Denis Laurin, Steve MacLean

Proceedings Volume 3074, (1997) https://doi.org/10.1117/12.280635

KEYWORDS: Cameras, Sensors, Calibration, Laser scanners, Raster graphics, Eye, Laser range finders, Sun, Laser sources, Scanners

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This paper focuses on the characteristics and performance of a laser range scanner (LARS) with short and medium range 3D sensing capabilities for space applications. This versatile laser range scanner is a precision measurement tool intended to complement the current Canadian Space Vision System (CSVS). Together, these vision systems are intended to be used during the construction of the International Space Station (ISS). Integration of the LARS to the CSVS will allow 3D surveying of a robotic work-site, identification of known objects from registered range and intensity images, and object detection and tracking relative to the orbiter and ISS. The data supplied by the improved CSVS will be invaluable in Orbiter rendez-vous and in assisting the Orbiter/ISS Remote Manipulator System operators. The major advantages of the LARS over conventional video-based imaging are its ability to operate with sunlight shining directly into the scanner and its immunity to spurious reflections and shadows which occur frequently in space. Because the LARS is equipped with two high-speed galvanometers to steer the laser beam, any spatial location within the field of view of the camera can be addressed. This level of versatility enables the LARS to operate in two basic scan pattern modes: (1) variable scan resolution mode and (2) raster scan mode. In the variable resolution mode, the LARS can search and track targets and geometrical features on objects located within a field of view of 30 degrees X 30 degrees and with corresponding range from about 0.5 m to 2000 m. This flexibility allows implementations of practical search and track strategies based on the use of Lissajous patterns for multiple targets. The tracking mode can reach a refresh rate of up to 137 Hz. The raster mode is used primarily for the measurement of registered range and intensity information of large stationary objects. It allows among other things: target-based measurements, feature-based measurements, and, image-based measurements like differential inspection in 3D space and surface reflectance monitoring. The digitizing and modeling of human subjects, cargo payloads, and environments are also possible with the LARS. A number of examples illustrating the many capabilities of the LARS are presented in this paper.

Proceedings Article | 7 July 1997 Paper

Calibration of an anamorphic laser-based 3D range sensor

Francois Blais, J. Beraldin

Proceedings Volume 3174, (1997) https://doi.org/10.1117/12.279772

KEYWORDS: Calibration, Sensors, Laser vision correction, Lens design, Sensor calibration, Spherical lenses, Photogrammetry, Monochromatic aberrations, Prototyping

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Proceedings Article | 7 July 1997 Paper

System for indoor 3D mapping and virtual environments

Sabry El-Hakim, Pierre Boulanger, Francois Blais, J. Beraldin

Proceedings Volume 3174, (1997) https://doi.org/10.1117/12.279791

KEYWORDS: 3D modeling, Virtual reality, Data modeling, 3D metrology, Environmental sensing, Mining, Optical imaging, Image sensors, Sensors, 3D image processing

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Proceedings Article | 21 March 1997 Paper

High-resolution digital 3D imaging of large structures

Marc Rioux, J. Beraldin, Guy Godin, Francois Blais, Luc Cournoyer

Proceedings Volume 3023, (1997) https://doi.org/10.1117/12.269748

KEYWORDS: Cameras, Inspection, Laser scanners, 3D modeling, Panoramic photography, Visualization, Stereoscopic cameras, 3D scanning, 3D image processing, Optical inspection

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Proceedings Article | 26 June 1996 Paper

Eye-safe imaging and tracking laser scanner system for space applications

Denis Laurin, Francois Blais, J. Beraldin, Luc Cournoyer

Proceedings Volume 2748, (1996) https://doi.org/10.1117/12.243550

KEYWORDS: Laser scanners, Scanners, Imaging systems, 3D scanning, Mirrors, Laser systems engineering, Space operations, Laser sources, Inspection, Laser development

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Proceedings Article | 1 December 1995 Paper

Comparative evaluation of the performance of passive and active 3D vision systems

Sabry El-Hakim, J. Beraldin, Francois Blais

Proceedings Volume 2646, (1995) https://doi.org/10.1117/12.227862

KEYWORDS: Cameras, Sensors, 3D vision, Calibration, 3D acquisition, 3D metrology, Optical spheres, 3D image processing, Error analysis, Scanners

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Proceedings Article | 17 October 1994 Paper

Digital three-dimensional imaging in the infrared at the National Research Council of Canada

J. Beraldin, Marc Rioux, Francois Blais, R. Couvillon

Proceedings Volume 2269, (1994) https://doi.org/10.1117/12.188638

KEYWORDS: Sensors, Cameras, Photodiodes, Eye, Laser sources, Infrared technology, Indium gallium arsenide, Speckle, Information operations, Infrared radiation

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Proceedings Article | 1 March 1994 Paper

Differential inspection of shapes using optical 3D measurements

Marc Rioux, Guy Godin, Francois Blais, Rejean Baribeau

Proceedings Volume 2252, (1994) https://doi.org/10.1117/12.169864

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Proceedings Article | 4 May 1993 Paper

Range-image segmentation, free-space determination, and position estimate for a mobile vehicle

Pierre Boulanger, Francois Blais

Proceedings Volume 1831, (1993) https://doi.org/10.1117/12.143813

KEYWORDS: Sensors, Free space, Image segmentation, Mobile robots, Environmental sensing, Collision avoidance, Cameras, Data modeling, Image sensors, Mathematical morphology

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SPIE Journal Paper | 1 January 1992

Registered intensity and range imaging at 10 mega-samples per second

J. Beraldin, Marc Rioux, Francois Blais, Luc Cournoyer, Jacques Domey

OE, Vol. 31, Issue 01, (January 1992) https://doi.org/10.1117/12.10.1117/12.56041

KEYWORDS: Cameras, Sensors, Position sensors, Mirrors, Imaging systems, Video, Polygon scanners, Range imaging, Scanners, Photodiodes

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Proceedings Article | 1 August 1991 Paper

Intelligent variable-resolution laser scanner for the space vision system

Francois Blais, Marc Rioux, Steve MacLean

Proceedings Volume 1482, (1991) https://doi.org/10.1117/12.45721

KEYWORDS: Sensors, Signal processing, Laser scanners, Satellites, Optical tracking, Mirrors, Digital signal processing, Sun, Image resolution, Automatic tracking

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Proceedings Article | 1 July 1991 Paper

Sensing and environment perception for a mobile vehicle

Francois Blais, Marc Rioux

Proceedings Volume 1480, (1991) https://doi.org/10.1117/12.46495

KEYWORDS: Sensors, Environmental sensing, Free space, Cameras, Video, Mathematical morphology, Panoramic photography, Active sensors, Head, CCD cameras

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Showing 5 of 34 publications

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