Dr. Edward R. Dowski Profile

Dr. Edward R. Dowski

President at Ascentia Imaging Inc

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 21 June 2019 Presentation + Paper

Ultra-precision angle measurement sensors with optimized size, weight and power

Edward Dowski, Gregory Johnson, Nelson Claytor

Proceedings Volume 11062, 1106210 (2019) https://doi.org/10.1117/12.2526294

KEYWORDS: Sensors, Signal to noise ratio, Light emitting diodes, Photomasks, Optical components, Radar, Optical filters, Calibration

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Proceedings Article | 25 May 2005 Paper

Analysis tools for computational imaging systems

G. Johnson, P. Silveira, E. Dowski

Proceedings Volume 5817, (2005) https://doi.org/10.1117/12.602581

KEYWORDS: Imaging systems, Atrial fibrillation, Computational imaging, Computing systems, Point spread functions, Monochromatic aberrations, Optical transfer functions, Fourier transforms, Electronics, Spatial frequencies

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Proceedings Article | 12 May 2005 Paper

Increasing the depth of field in an LWIR system for improved object identification

Kenneth Kubala, Hans Wach, Vladislav Chumachenko, Edward Dowski

Proceedings Volume 5784, (2005) https://doi.org/10.1117/12.604079

KEYWORDS: Wavefronts, Signal processing, Long wavelength infrared, Imaging systems, Sensors, Interference (communication), Modulation transfer functions, Signal to noise ratio, Systems modeling, Optical design

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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 | 22 October 2004 Paper

Design and optimization of aberration and error invariant space telescope systems

Kenneth Kubala, Edward Dowski, James Kobus, Robert Brown

Proceedings Volume 5524, (2004) https://doi.org/10.1117/12.560305

KEYWORDS: Wavefronts, Modulation transfer functions, Signal processing, Point spread functions, Space telescopes, Mirrors, Telescopes, Filtering (signal processing), Imaging systems, Image segmentation

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Proceedings Article | 30 August 2004 Paper

IR imaging system with decreased hyperfocal distance

Kenneth Kubala, Vlad Chumachenko, Alan Baron, Edward Dowski, Jr.

Proceedings Volume 5406, (2004) https://doi.org/10.1117/12.542559

KEYWORDS: Wavefronts, Imaging systems, Signal processing, Modulation transfer functions, Point spread functions, Infrared imaging, Sensors, Optics manufacturing, Long wavelength infrared, Image processing

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Proceedings Article | 5 August 2004 Paper

Reducing size, weight, and cost in a LWIR imaging system with wavefront coding

Edward Dowski, Kenneth Kubala

Proceedings Volume 5407, (2004) https://doi.org/10.1117/12.542298

KEYWORDS: Signal processing, Imaging systems, Modulation transfer functions, Wavefronts, Point spread functions, Optical design, Signal to noise ratio, Sensors, Spatial frequencies, Long wavelength infrared

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Proceedings Article | 15 July 2004 Paper

Noise modeling for design and simulation of computational imaging systems

Hans Wach, Edward Dowski

Proceedings Volume 5438, (2004) https://doi.org/10.1117/12.542258

KEYWORDS: Interference (communication), Sensors, Systems modeling, CMOS sensors, Photons, Imaging systems, Signal detection, Computer simulations, Computational imaging, Computing systems

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Proceedings Article | 21 May 2004 Paper

Design and optimization of computational imaging systems

Edward Dowski, Kenneth Kubala

Proceedings Volume 5299, (2004) https://doi.org/10.1117/12.526918

KEYWORDS: Imaging systems, Signal processing, Modulation transfer functions, Point spread functions, Wavefronts, Optical design, Sensors, Optimization (mathematics), Computational imaging, Computing systems

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Proceedings Article | 30 July 2002 Paper

Modeling of wavefront-coded imaging systems

Edward Dowski, Kenneth Kubala

Proceedings Volume 4736, (2002) https://doi.org/10.1117/12.477572

KEYWORDS: Wavefronts, Imaging systems, Modulation transfer functions, Temperature metrology, Sensors, Infrared imaging, Signal processing, Tolerancing, Systems modeling, Control systems

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Proceedings Article | 14 December 2001 Paper

Wavefront coded zoom lens system

Inga Prischepa, Edward Dowski

Proceedings Volume 4487, (2001) https://doi.org/10.1117/12.450412

KEYWORDS: Zoom lenses, Wavefronts, Imaging systems, Modulation transfer functions, Digital filtering, Point spread functions, Digital image processing, Image filtering, Optical design, Monochromatic aberrations

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Proceedings Article | 13 November 2001 Paper

Logarithmic phase filter to extend the depth of field of incoherent hybrid imaging systems

Sherif Sherif, Edward Dowski, W. Thomas Cathey

Proceedings Volume 4471, (2001) https://doi.org/10.1117/12.449345

KEYWORDS: Imaging systems, Image filtering, Point spread functions, Optical filters, Modulation transfer functions, Focus stacking, Image processing, Digital filtering, Image resolution, Spatial frequencies

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Proceedings Article | 29 June 2000 Paper

Wavefront coding: jointly optimized optical and digital imaging systems

Edward Dowski, Robert Cormack, Scott Sarama

Proceedings Volume 4041, (2000) https://doi.org/10.1117/12.390475

KEYWORDS: Imaging systems, Wavefronts, Point spread functions, Temperature metrology, Modulation transfer functions, Digital filtering, Digital signal processing, Digital imaging, Silicon, Optical mounts

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Proceedings Article | 5 October 1999 Paper

Wavefront coding: a modern method of achieving high-performance and/or low-cost imaging systems

Edward Dowski, Gregory Johnson

Proceedings Volume 3779, (1999) https://doi.org/10.1117/12.368203

KEYWORDS: Wavefronts, Imaging systems, Point spread functions, Digital signal processing, Modulation transfer functions, Digital image processing, Image compression, Optical components, Code division multiplexing, Optical transfer functions

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Proceedings Article | 21 September 1998 Paper

Modern wavefront-based optical antialiasing filter

Edward Dowski, W. Thomas Cathey

Proceedings Volume 3482, (1998) https://doi.org/10.1117/12.321974

KEYWORDS: Spatial frequencies, Optical filters, Quartz, Sensors, Charge-coupled devices, Image filtering, Point spread functions, CCD image sensors, Imaging systems, Crystals

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Proceedings Article | 18 September 1997 Paper

High depth-of-field imaging without sacrificing light-gathering power and resolution

Alan FitzGerrell, Edward Dowski

Proceedings Volume 3205, (1997) https://doi.org/10.1117/12.285587

KEYWORDS: Image resolution, Imaging systems, CCD cameras, Wavefronts, Signal to noise ratio

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Proceedings Article | 5 February 1996 Paper

Optical/digital aberration control in incoherent optical systems

W. Thomas Cathey, Edward Dowski, Alan FitzGerrell

Proceedings Volume 2730, (1996) https://doi.org/10.1117/12.231052

KEYWORDS: Optical transfer functions, Monochromatic aberrations, Focus stacking, Imaging systems, Control systems, Digital imaging, Image restoration, Digital signal processing, Image quality, Spatial frequencies

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Proceedings Article | 11 August 1995 Paper

Aspheric optical elements for extended depth-of-field imaging

Joseph van der Gracht, Edward Dowski, W. Thomas Cathey, John Bowen

Proceedings Volume 2537, (1995) https://doi.org/10.1117/12.216392

KEYWORDS: Imaging systems, Optical transfer functions, Digital filtering, Spatial frequencies, Modulation transfer functions, Diffraction, Sensors, Optical components, Digital imaging, Point spread functions

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Proceedings Article | 27 March 1995 Paper

Three-dimensional range information from single-frame incoherently illuminated images

W. Thomas Cathey, Edward Dowski

Proceedings Volume 2423, (1995) https://doi.org/10.1117/12.205503

KEYWORDS: Optical transfer functions, Imaging systems, Spatial frequencies, Ranging, Point spread functions, Focus stacking, Prisms, Digital filtering, 3D image processing, Singular optics

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Showing 5 of 19 publications

Conference Committee Involvement (2)

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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