Dr. Ramkumar Narayanswamy Profile

Dr. Ramkumar Narayanswamy

President at Teaq Innovations

SPIE Involvement:

Author

Publications (14)

Proceedings Article | 30 August 2006 Paper

Design and optimization of the cubic-phase pupil for the extension of the depth of field of task-based imaging systems

Saeed Bagheri, Paulo Silveira, Ramkumar Narayanswamy, Daniela Pucci de Farias

Proceedings Volume 6311, 63110R (2006) https://doi.org/10.1117/12.681284

KEYWORDS: Imaging systems, Modulation transfer functions, Spatial frequencies, Signal to noise ratio, Image quality, Wavefronts, Iris recognition, Modulation, Visualization, Image resolution

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Proceedings Article | 17 April 2006 Paper

Iris recognition at a distance with expanded imaging volume

Ramkumar Narayanswamy, Paulo Silveira

Proceedings Volume 6202, 62020G (2006) https://doi.org/10.1117/12.666883

KEYWORDS: Iris recognition, Imaging systems, Signal to noise ratio, Wavefronts, Spatial frequencies, Detection and tracking algorithms, Sensors, Eye, Biometrics, Cameras

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Proceedings Article | 28 March 2005 Paper

Extended depth-of-field iris recognition system for a workstation environment

Ramkumar Narayanswamy, Paulo Silveira, Harsha Setty, V. Pauca, Joseph van der Gracht

Proceedings Volume 5779, (2005) https://doi.org/10.1117/12.603612

KEYWORDS: Imaging systems, Iris recognition, Wavefronts, Spatial frequencies, Modulation transfer functions, Signal to noise ratio, Sensors, Modulation, Biometrics, Image processing

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Proceedings Article | 26 October 2004 Paper

Computational imaging systems for iris recognition

Robert Plemmons, Michael Horvath, Emily Leonhardt, V. Pauca, Sudhakar Prasad, Stephen Robinson, Harsha Setty, Todd Torgersen, Joseph van der Gracht, Edward Dowski, Ramkumar Narayanswamy, Paulo Silveira

Proceedings Volume 5559, (2004) https://doi.org/10.1117/12.560186

KEYWORDS: Iris recognition, Imaging systems, Computing systems, Detection and tracking algorithms, Computational imaging, Image restoration, Image processing, Computer programming, Feature extraction, Cameras

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Proceedings Article | 15 July 2004 Paper

Iris recognition with enhanced depth-of-field image acquistion

Joseph van der Gracht, V. Pauca, Harsha Setty, Ramkumar Narayanswamy, Robert Plemmons, Sudhakar Prasad, Todd Torgersen

Proceedings Volume 5438, (2004) https://doi.org/10.1117/12.542151

KEYWORDS: Iris recognition, Detection and tracking algorithms, Imaging systems, Signal to noise ratio, Image restoration, Cameras, Aspheric lenses, Modulation transfer functions, Wavelets, Image filtering

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Proceedings Article | 21 May 2004 Paper

Applications of wavefront coded imaging

Ramkumar Narayanswamy, Alan Baron, Vladislav Chumachenko, Adam Greengard

Proceedings Volume 5299, (2004) https://doi.org/10.1117/12.527033

KEYWORDS: Imaging systems, Wavefronts, Modulation transfer functions, Diffraction, Cameras, Point spread functions, Iris recognition, Modulation, Spatial frequencies, Image processing

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Proceedings Article | 1 October 1998 Paper

Intelligent data elimination for a rare event application

Ramkumar Narayanswamy, John Metz, Kristina Johnson

Proceedings Volume 3460, (1998) https://doi.org/10.1117/12.323161

KEYWORDS: Tin, Integrated optics, Inspection, Neural networks, Image classification, Image segmentation, Detection and tracking algorithms, Artificial neural networks, Evolutionary algorithms, Blood

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Proceedings Article | 1 November 1996 Paper

Optoelectronic region of interest detection in monolayer cervical smear slides

John Metz, Ramkumar Narayanswamy, Rosemary Stewart, Kristina Johnson

Proceedings Volume 2848, (1996) https://doi.org/10.1117/12.256156

KEYWORDS: Optoelectronics, Sensors, Databases, Computing systems, Classification systems, Image processing, Optical correlators, Computer simulations, Control systems, Microscopes

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Proceedings Article | 28 March 1995 Paper

Analysis of morphological structuring elements generated using adaptive resonance theory

John Sharpe, Nilgun Sungar, Ramkumar Narayanswamy, Kristina Johnson

Proceedings Volume 2424, (1995) https://doi.org/10.1117/12.205266

KEYWORDS: Fuzzy logic, Image processing, Databases, Neural networks, Binary data, Algorithm development, Eye, Physics, Evolutionary algorithms, Algorithms

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Proceedings Article | 28 March 1995 Paper

Morphological feature detection for cervical cancer screening

Ramkumar Narayanswamy, John Sharpe, Heather Duke, Rosemary Stewart, Kristina Johnson

Proceedings Volume 2424, (1995) https://doi.org/10.1117/12.205227

KEYWORDS: Databases, Optoelectronics, Image processing, Optical correlators, Computer simulations, Microscopes, Niobium, Image filtering, Cervical cancer, CCD cameras

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Proceedings Article | 26 May 1994 Paper

Optoelectronic image processing for cervical cancer screening

Ramkumar Narayanswamy, John Sharpe, Kristina Johnson

Proceedings Volume 2132, (1994) https://doi.org/10.1117/12.176584

KEYWORDS: Image processing, Holograms, Optical filters, Optoelectronics, Holography, Optically addressed spatial light modulators, Image filtering, Optical correlators, Cervical cancer, Detection and tracking algorithms

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Proceedings Article | 1 March 1991 Paper

Robust image coding with a model of adaptive retinal processing

Ramkumar Narayanswamy, Rachel Alter-Gartenberg, Friedrich Huck

Proceedings Volume 1385, (1991) https://doi.org/10.1117/12.25351

KEYWORDS: Image compression, Optical filters, Reflectivity, Image processing, Image filtering, Image restoration, Machine vision, Computer programming, Signal to noise ratio, Visual process modeling

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SPIE Journal Paper | 1 February 1991

Characterizing digital image acquisition devices

Stephen Reichenbach, Stephen Park, Ramkumar Narayanswamy

OE, Vol. 30, Issue 02, (February 1991) https://doi.org/10.1117/12.10.1117/12.55783

KEYWORDS: Optical transfer functions, Digital imaging, Signal to noise ratio, Imaging systems, Point spread functions, Super resolution, Cameras, Sensors, Imaging devices, Image acquisition

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Proceedings Article | 1 September 1990 Paper

Image coding by edge primitives

Rachel Alter-Gartenberg, Ramkumar Narayanswamy

Proceedings Volume 1360, (1990) https://doi.org/10.1117/12.24174

KEYWORDS: Image processing, Optical filters, Image compression, Reflectivity, Bandpass filters, Visual communications, Signal to noise ratio, Visual process modeling, Image restoration, Image filtering

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Showing 5 of 14 publications

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