Dr. James P. Ryle Profile

Dr. James P. Ryle

Senior RD& I Specialist at Univ College Dublin

SPIE Involvement:

Author

Publications (26)

Proceedings Article | 2 April 2020 Paper

Qualitative comparison of speckle image processing techniques for vein detection in plant leaf tissue

J. Dolan, J. Ryle, J. Sheridan

Proceedings Volume 11363, 113631X (2020) https://doi.org/10.1117/12.2555591

KEYWORDS: Veins, Speckle, Laser speckle contrast imaging, Tissues, Image processing, Near infrared, Blood circulation, Laser speckle imaging, Algorithm development, Natural surfaces

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Proceedings Article | 24 May 2018 Paper

Photon-counted integral holography using orthographic projection images

Min Wan, Inbarasan Muniraj, Ni Chen, Derek Cassidy, John Healy, James Ryle, John Sheridan

Proceedings Volume 10677, 106773G (2018) https://doi.org/10.1117/12.2307581

KEYWORDS: Holograms, Holography, 3D image processing, Photon counting, Digital holography, Image acquisition, Imaging systems, Neptunium, Computer generated holography, Visualization

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SPIE Journal Paper | 14 June 2017

Choice of optical system is critical for the security of double random phase encryption systems

Inbarasan Muniraj, Changliang Guo, Ra’ed Malallah, Derek Cassidy, Liang Zhao, James Ryle, John Healy, John Sheridan

OE, Vol. 56, Issue 06, 063103, (June 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.6.063103

KEYWORDS: Computer security, Optical authentication, Systems modeling, Computer programming, Optical image encryption, Image encryption

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Proceedings Article | 31 May 2017 Paper

Constraints to solve parallelogram grid problems in 2D non separable linear canonical transform

Liang Zhao, John Healy, Inbarasan Muniraj, Xiao-Guang Cui, Ra'ed Malallah, James Ryle, John Sheridan

Proceedings Volume 10233, 102331V (2017) https://doi.org/10.1117/12.2265862

KEYWORDS: Digital holography, Systems modeling, Signal analyzers, Digital Light Processing, Digital signal processing, Holograms, Fourier transforms, Data modeling, Radium, Data conversion, Analytics, Electronics engineering, Solar energy

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Proceedings Article | 16 May 2017 Presentation + Paper

Investigating nonlinear distortion in the photopolymer materials

Ra'ed Malallah, Derek Cassidy, Inbarasan Muniraj, Liang Zhao, James Ryle, John Sheridan

Proceedings Volume 10228, 1022805 (2017) https://doi.org/10.1117/12.2263749

KEYWORDS: Photopolymers, Waveguides, Light wave propagation, Laser beam propagation, Refractive index, Distortion, Diffraction, Polymer multimode waveguides, Photorefractive polymers, Polymers, 3D modeling, Photopolymer media

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Proceedings Article | 15 May 2017 Paper

Sparsity based terahertz reflective off-axis digital holography

Min Wan, Inbarasan Muniraj, Ra'ed Malallah, Liang Zhao, James Ryle, Lu Rong, John Healy, Dayong Wang, John Sheridan

Proceedings Volume 10233, 102330T (2017) https://doi.org/10.1117/12.2264788

KEYWORDS: Microwave radiation, Infrared imaging, Infrared radiation, Electromagnetism, Continuous wave operation, Digital holography, Holograms, Holography, Terahertz radiation, Reconstruction algorithms, Terahertz sources, Carbon dioxide lasers, Imaging systems, Reflectivity, Millimeter wave imaging

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Proceedings Article | 15 May 2017 Presentation + Paper

2D non-separable linear canonical transform (2D-NS-LCT) based cryptography

Liang Zhao, Inbarasan Muniraj, John Healy, Ra'ed Malallah, Xiao-Guang Cui, James Ryle, John Sheridan

Proceedings Volume 10233, 102331B (2017) https://doi.org/10.1117/12.2265863

KEYWORDS: Computer security, Fourier transforms, Cryptography, Systems modeling, Signal processing, Fractional fourier transform, Holography, Image encryption, Optical image encryption, Information security, Image processing, Gyrators, Phase retrieval

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Proceedings Article | 1 May 2017 Presentation + Paper

Measuring optical phase digitally in coherent metrology systems

Damien Kelly, James Ryle, Liang Zhao, John Sheridan

Proceedings Volume 10220, 102200B (2017) https://doi.org/10.1117/12.2262485

KEYWORDS: Fourier transforms, Charge-coupled devices, Geometrical optics, Transform theory, Reconstruction algorithms, Digital holography, Metrology, Phase retrieval, Speckle metrology, Phase measurement, Optical testing, Refractive index, Biological research, Paraxial approximations, Holography

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Proceedings Article | 8 May 2015 Paper

Self-trapping of optical beams in a self-written channel in a solid bulk photopolymer material

Haoyu Li, Yue Qi, Ra'ed Malallah, James Ryle, John Sheridan

Proceedings Volume 9508, 95080F (2015) https://doi.org/10.1117/12.2085769

KEYWORDS: Photopolymers, Refractive index, Waveguides, Solids, Diffraction, Channel projecting optics, Light wave propagation, Systems modeling, Geometrical optics, Numerical simulations

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SPIE Journal Paper | 12 February 2015 Open Access

Simultaneous drift, microsaccades, and ocular microtremor measurement from a single noncontact far-field optical sensor

James Ryle, Brian Vohnsen, John Sheridan

JBO, Vol. 20, Issue 02, 027004, (February 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.2.027004

KEYWORDS: Eye, Sensors, Imaging systems, Motion measurement, Head, Light sources, Sclera, Spatial resolution, Image sensors, Image resolution

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Proceedings Article | 1 May 2014 Paper

GPU accelerated holographic microscopy for the inspection of quickly moving fluids for applications in pharmaceutical manufacturing

Nazim Dugan, John Healy, James Ryle, Bryan Hennelly

Proceedings Volume 9131, 91311A (2014) https://doi.org/10.1117/12.2051789

KEYWORDS: Holography, Holograms, 3D image reconstruction, Particles, Inspection, Microfluidics, Digital holography, Microfluidic imaging, Image processing, Microscopy

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SPIE Journal Paper | 1 December 2011 Open Access

Lensless multispectral digital in-line holographic microscope

James Ryle, John Sheridan, Susan McDonnell

JBO, Vol. 16, Issue 12, 126004, (December 2011) https://doi.org/10.1117/12.10.1117/1.3659681

KEYWORDS: Digital holography, Holograms, Holography, Microscopes, Light emitting diodes, Imaging systems, Cameras, 3D image reconstruction, Image processing, Optical signal processing

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SPIE Journal Paper | 1 October 2011

Feasibility investigation of using tunable infrared communications laser for multiwavelength digital holographic Laplacian reconstruction

James Ryle, Dayan Li, John Sheridan

OE, Vol. 50, Issue 10, 105801, (October 2011) https://doi.org/10.1117/12.10.1117/1.3633335

KEYWORDS: Holograms, Cameras, Infrared lasers, Tunable lasers, Infrared imaging, Digital holography, Infrared cameras, Holography, Laser communications, Visible radiation

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Proceedings Article | 14 May 2010 Paper

Multispectral lensless digital in-line holographic microscope: LED illumination

James Ryle, Susan McDonnell, John Sheridan

Proceedings Volume 7717, 77170P (2010) https://doi.org/10.1117/12.854960

KEYWORDS: Digital holography, Holography, Holograms, Microscopes, LED lighting, Latex, Cameras, Light emitting diodes, Light scattering, Glasses

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Proceedings Article | 1 October 2009 Paper

Linear canonical transform sampling: analysis

John Healy, John Sheridan, James Ryle

Proceedings Volume 7427, 742703 (2009) https://doi.org/10.1117/12.826886

KEYWORDS: Fourier transforms, Signal processing, Digital holography, Direct methods, Matrices, Wave propagation, Statistical analysis, Analytical research, Numerical simulations, Convolution

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Proceedings Article | 2 September 2009 Paper

Segmentation and visualization of digital in-line holographic microscopy of three-dimensional scenes using reconstructed intensity images

Karen Molony, James Ryle, Susan McDonnell, John Sheridan, Thomas Naughton

Proceedings Volume 7443, 74431F (2009) https://doi.org/10.1117/12.826832

KEYWORDS: Image segmentation, Digital holography, 3D image processing, Holography, Visualization, Microscopy, Holograms, 3D image reconstruction, Glasses, 3D modeling

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Proceedings Article | 1 September 2009 Paper

Real world objects: capturing using in-line digital holography, projecting using spatial light modulators

James Ryle, David Monaghan, Susan McDonnell, John Sheridan

Proceedings Volume 7442, 74421B (2009) https://doi.org/10.1117/12.826885

KEYWORDS: Holograms, Digital holography, Holography, 3D image reconstruction, Speckle, CCD cameras, Spatial light modulators, Interferometry, Image processing, 3D image processing

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Proceedings Article | 1 September 2009 Paper

Multispectral lensless digital holographic microscope: imaging MCF-7 and MDA-MB-231 cancer cell cultures

James Ryle, Karen Molony, Susan McDonnell, Thomas Naughton, John Sheridan

Proceedings Volume 7442, 744206 (2009) https://doi.org/10.1117/12.826882

KEYWORDS: Holograms, Digital holography, 3D image reconstruction, Holography, Cameras, Image segmentation, Microscopes, Multispectral imaging, Image processing, Reconstruction algorithms

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Proceedings Article | 22 August 2009 Paper

Speckle interferometric sensor to measure low-amplitude high frequency ocular microtremor (OMT)

James Ryle, Mohammed Al-Kalbani, Unnikrishnan Gopinathan, Gerard Boyle, Davis Coakley, John Sheridan

Proceedings Volume 7429, 74290J (2009) https://doi.org/10.1117/12.826891

KEYWORDS: Eye, Speckle, Safety, Signal processing, Modulation, Interferometers, Motion measurement, Photodiodes, Interferometry, Sensors

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SPIE Journal Paper | 1 January 2009 Open Access

Compact portable ocular microtremor sensor: design, development and calibration

James Ryle, Mohammed Ali Al-Kalbani, Niamh Collins, Unnikrishnan Gopinathan, Gerard Boyle, Davis Coakley, John Sheridan

JBO, Vol. 14, Issue 01, 014021, (January 2009) https://doi.org/10.1117/12.10.1117/1.3083435

KEYWORDS: Eye, Speckle, Signal to noise ratio, Calibration, Safety, Sensors, Signal processing, Laser safety, Medical research, Interferometers

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Proceedings Article | 2 May 2008 Paper

Speckle interferometric system to measure ocular microtremor

James Ryle, Mohammed Al-Kalbani, Niamh Collins, Unnikrishnan Gopinathan, Gerard Boyle, Davis Coakley, John Sheridan

Proceedings Volume 6991, 69910H (2008) https://doi.org/10.1117/12.782260

KEYWORDS: Eye, Speckle, Signal processing, Motion measurement, Modulation, Interferometers, Digital signal processing, Interferometry, Optical fibers, Photodiodes

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Proceedings Article | 25 April 2008 Paper

A compact speckle interferometer for measuring low-amplitude low frequency motion

James Ryle, Mohammed Al-Kalbani, Unnikrishnan Gopinathan, Gerard Boyle, Davis Coakley, John Sheridan

Proceedings Volume 6994, 69940S (2008) https://doi.org/10.1117/12.781852

KEYWORDS: Speckle, Interferometers, Digital signal processing, Signal to noise ratio, Sensors, Modulation, Signal processing, Motion measurement, Calibration, Demodulation

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Proceedings Article | 20 September 2007 Paper

Analysis of double random phase encryption from a key-space perspective

David Monaghan, Guohai Situ, James Ryle, Unnikrishnan Gopinathan, Thomas Naughton, John Sheridan

Proceedings Volume 6695, 66950Q (2007) https://doi.org/10.1117/12.737284

KEYWORDS: Image encryption, Quantization, Optical image encryption, Visualization, Digital holography, Error analysis, Solids, Optical design, Spatial light modulators, Computer programming

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Proceedings Article | 5 September 2006 Paper

The fabrication of micro lens controlled by high voltage

Ying Liu, James Ryle, Unnikrishnan Gopinathan, Alun Carr, John Sheridan

Proceedings Volume 6289, 62891B (2006) https://doi.org/10.1117/12.680727

KEYWORDS: Liquids, Ultraviolet radiation, Microlens, Solids, Interferometry, Mach-Zehnder interferometers, Electrodes, Liquid lenses, Optical properties, Fabrication

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Proceedings Article | 30 August 2006 Paper

Digital inline holography of biological specimens

James Ryle, Unnikrishnan Gopinathan, Susan McDonnell, Thomas Naughton, John Sheridan

Proceedings Volume 6311, 63110C (2006) https://doi.org/10.1117/12.680798

KEYWORDS: Holograms, 3D image reconstruction, Holography, Digital holography, Light emitting diodes, Light, 3D image processing, Optical filters, Imaging systems, Light sources

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Proceedings Article | 25 April 2006 Paper

E-field control of the optical properties of liquid micro-optical elements

Ying Liu, Feidhlim O'Neill, James Ryle, Unnikrishnan Gopinathan, Alun Carr, John Sheridan

Proceedings Volume 6187, 618711 (2006) https://doi.org/10.1117/12.662116

KEYWORDS: Electrodes, Microlens, Ultraviolet radiation, Liquids, Glasses, Mach-Zehnder interferometers, Lenses, Optical components, Optical properties, Interferometry

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Showing 5 of 26 publications

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