Dr. Frédéric Guichard Profile

Dr. Frédéric Guichard

at DxO Labs

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 7 March 2014 Paper

Electronic trigger for capacitive touchscreen and extension of ISO 15781 standard time lag measurements to smartphones

François-Xavier Bucher, Frédéric Cao, Clément Viard, Frédéric Guichard

Proceedings Volume 9023, 90230D (2014) https://doi.org/10.1117/12.2042162

KEYWORDS: Camera shutters, Standards development, Time metrology, Light emitting diodes, Cameras, Galactic astronomy, Image quality standards, Sensors, Imaging devices, Measurement devices

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Proceedings Article | 3 February 2014 Paper

Device and algorithms for camera timing evaluation

Lucie Masson, Frédéric Cao, Clément Viard, Frédéric Guichard

Proceedings Volume 9016, 90160G (2014) https://doi.org/10.1117/12.2042161

KEYWORDS: Light emitting diodes, Camera shutters, Cameras, Video, Calibration, Time metrology, Standards development, Light sources and illumination, Image quality standards, Digital cameras

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Proceedings Article | 4 February 2013 Paper

Measurement and protocol for evaluating video and still stabilization systems

Etienne Cormier, Frédéric Cao, Frédéric Guichard, Clément Viard

Proceedings Volume 8653, 865303 (2013) https://doi.org/10.1117/12.2003583

KEYWORDS: Cameras, Video, Motion measurement, Photography, Sensors, Camera shutters, Gyroscopes, Modulation transfer functions, Image sensors, Standards development

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Proceedings Article | 24 January 2012 Paper

An objective protocol for comparing the noise performance of silver halide film and digital sensor

Frédéric Cao, Frédéric Guichard, Hervé Hornung, Régis Tessière

Proceedings Volume 8299, 829902 (2012) https://doi.org/10.1117/12.910113

KEYWORDS: Sensors, Signal to noise ratio, Photography, Image quality, Image sensors, Image processing, Cameras, Silver, Scanners, Digital imaging

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Proceedings Article | 24 January 2011 Paper

Performance of extended depth of field systems and theoretical diffraction limit

Nicolas Bachelard, Frédéric Guichard, Frédéric Cao, Imène Tarchouna

Proceedings Volume 7876, 787607 (2011) https://doi.org/10.1117/12.872459

KEYWORDS: Optical transfer functions, Diffraction, Modulation transfer functions, Cameras, Wavefronts, Focus stacking, Sensors, Apodization, Lenses, Lens design

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Proceedings Article | 19 January 2010 Paper

Dead leaves model for measuring texture quality on a digital camera

Frédéric Cao, Frédéric Guichard, Hervé Hornung

Proceedings Volume 7537, 75370E (2010) https://doi.org/10.1117/12.838902

KEYWORDS: Modulation transfer functions, Fourier transforms, Cameras, Image quality, Image processing, Stochastic processes, Digital signal processing, Mathematical modeling, Digital cameras, Statistical modeling

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Proceedings Article | 19 January 2010 Paper

Information capacity: a measure of potential image quality of a digital camera

Frédéric Cao, Frédéric Guichard, Hervé Hornung

Proceedings Volume 7537, 75370F (2010) https://doi.org/10.1117/12.838903

KEYWORDS: Sensors, Cameras, Distortion, Modulation transfer functions, Chromatic aberrations, Image quality, Signal attenuation, Digital cameras, Photography, Image resolution

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Proceedings Article | 19 January 2009 Paper

Sensor information capacity and spectral sensitivities

F. Cao, F. Guichard, H. Hornung, L. Masson

Proceedings Volume 7250, 725006 (2009) https://doi.org/10.1117/12.805860

KEYWORDS: Sensors, Cameras, RGB color model, Diffraction, Image resolution, Modulation transfer functions, Optical resolution, Signal to noise ratio, Image quality, Image sensors

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Proceedings Article | 19 January 2009 Paper

Measuring texture sharpness of a digital camera

F. Cao, F. Guichard, Hervé Hornung

Proceedings Volume 7250, 72500H (2009) https://doi.org/10.1117/12.805853

KEYWORDS: Modulation transfer functions, Cameras, Image quality, Optical filters, Digital cameras, Denoising, Detection and tracking algorithms, Mathematical modeling, Photography, Signal processing

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Proceedings Article | 19 January 2009 Paper

Extended depth-of-field using sharpness transport across color channels

Frédéric Guichard, Hoang-Phi Nguyen, Régis Tessières, Marine Pyanet, Imène Tarchouna, Frédéric Cao

Proceedings Volume 7250, 72500N (2009) https://doi.org/10.1117/12.805915

KEYWORDS: Modulation transfer functions, Cameras, Optical signal processing, Lens design, Chromatic aberrations, Imaging systems, Point spread functions, Image processing, Digital signal processing, Computational imaging

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Proceedings Article | 11 September 2008 Paper

Extended depth-of-field (EDoF) using sharpness transport across colour channels

Christel-Loic Tisse, Hoang Phi Nguyen, Régis Tessières, Marine Pyanet, Frédéric Guichard

Proceedings Volume 7061, 706105 (2008) https://doi.org/10.1117/12.793826

KEYWORDS: Cameras, Lens design, Imaging systems, Modulation transfer functions, Chromatic aberrations, Optical signal processing, Point spread functions, Computational imaging, Digital imaging, Image restoration

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Proceedings Article | 3 March 2008 Paper

Sensor spectral sensitivities, noise measurements, and color sensitivity

Frédéric Cao, Frédéric Guichard, Hervé Hornung

Proceedings Volume 6817, 68170T (2008) https://doi.org/10.1117/12.766185

KEYWORDS: Signal to noise ratio, Sensors, Cameras, Image quality, RGB color model, Colorimetry, Calibration, Space sensors, 3D modeling, Digital cameras

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Proceedings Article | 3 March 2008 Paper

Characterization and measurement of color fringing

Frédéric Cao, Frédéric Guichard, Hervé Hornung, Cédric Sibade

Proceedings Volume 6817, 68170G (2008) https://doi.org/10.1117/12.766193

KEYWORDS: Chromatic aberrations, Sensors, Photography, Cameras, Digital photography, Optical design, Silver, Quantum efficiency, Optics manufacturing, Lenses

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Proceedings Article | 3 March 2008 Paper

Does resolution really increase image quality?

Christel-Loïc Tisse, Frédéric Guichard, Frédéric Cao

Proceedings Volume 6817, 68170Q (2008) https://doi.org/10.1117/12.766150

KEYWORDS: Sensors, Modulation transfer functions, Image sensors, Signal to noise ratio, Image quality, Spatial resolution, Image resolution, Imaging systems, Manufacturing, Photodiodes

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Proceedings Article | 20 February 2007 Paper

From spectral sensitivities to noise characteristics

Jérôme Buzzi, Frédéric Guichard, Hervé Hornung

Proceedings Volume 6502, 650209 (2007) https://doi.org/10.1117/12.703961

KEYWORDS: Signal to noise ratio, Cameras, Sensors, Optical filters, Device simulation, Image processing, Interference (communication), RGB color model, Image acquisition, Optical filtering

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Proceedings Article | 21 February 2001 Paper

Software-based universal demultiplexing: threshold-free energy minimization approach

Frederic Guichard, Alexander Litz, Lenny Rudin, Ping Yu

Proceedings Volume 4232, (2001) https://doi.org/10.1117/12.417575

KEYWORDS: Video, Video surveillance, Cameras, Multiplexing, Multiplexers, Information security, Algorithm development, Error analysis, Image processing algorithms and systems, Signal generators

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Proceedings Article | 14 June 1996 Paper

Nonlinear frame fusion by minimizing divergence magnitude of optical flow

Frederic Guichard, Lenny Rudin

Proceedings Volume 2755, (1996) https://doi.org/10.1117/12.243193

KEYWORDS: Image fusion, Optical flow, Video, Nonlinear optics, Fusion energy, Video surveillance, Signal to noise ratio, Video processing, Image resolution, Motion estimation

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Showing 5 of 17 publications

Conference Committee Involvement (3)

Digital Photography VII

24 January 2011 | San Francisco Airport, California, United States

Digital Photography VI

18 January 2010 | San Jose, California, United States

Digital Photography V

19 January 2009 | San Jose, California, United States

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