Dr. Ralph T. Hoctor Profile

Dr. Ralph T. Hoctor

Electrical Engineer

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Publications (3)

Proceedings Article | 29 March 2013 Paper

Reduction of rotational asymmetry in PSF synthesis for a broadband forward-looking ring array

Jing Jin, Ralph Hoctor

Proceedings Volume 8675, 867519 (2013) https://doi.org/10.1117/12.2006953

KEYWORDS: Point spread functions, Bessel beams, Synthetic apertures, Reflectors, Ultrasonography, Imaging arrays, Imaging systems, Signal to noise ratio, Phase shifts, Spherical lenses

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Proceedings Article | 2 February 2006 Paper

Computed spectroscopy using segmented apertures

Ralph Hoctor, Frederick Wheeler, Eamon Barrett

Proceedings Volume 6065, 60650H (2006) https://doi.org/10.1117/12.659610

KEYWORDS: Spatial frequencies, Image segmentation, Point spread functions, Imaging spectroscopy, Spectroscopy, Imaging systems, Fourier transforms, Image restoration, Optical transfer functions, Transmittance

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Proceedings Article | 11 March 2005 Paper

Super-resolution image synthesis using projections onto convex sets in the frequency domain

Frederick Wheeler, Ralph Hoctor, Eamon Barrett

Proceedings Volume 5674, (2005) https://doi.org/10.1117/12.605436

KEYWORDS: Point spread functions, Lawrencium, Image sensors, Sensors, Imaging systems, Super resolution, Spatial frequencies, Optical transfer functions, Image acquisition, Signal to noise ratio

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