Elmer Williams

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Using image processing techniques, the Gunfire Detection and Location (GDL) system detects gunfire and aims a suite of imagers at the muzzle flash point of origin. This detection and location function is critical for force and perimeter defense in densely populated areas as well as difficult operating environments such as a remote desert. This paper defines(More)
Over the past few years, the Naval Research Laboratory (NRL) has been developing gunfire detection systems using infrared sensors. During the past year, the primary focus of this effort has been on algorithm performance improvements for gunfire detection from infrared imagery. A database of recordings of small arms fire and background clutter is being(More)
Harsh Environment Applied Technology (HEAT) has developed a ground-based forward-looking multispectral data collection system mounted on a rugged all terrain vehicle (ATV) to allow recording imagery while moving over rough terrain. The image data collected from multiple bands of the electro-optical/infrared (EO/IR) spectrum is used to aid image fusion(More)
The quasifission mechanism hinders fusion in heavy systems through breakup within zeptoseconds into two fragments with partial mass equilibration. Its dependence on the structure of both the collision partners and the final fragments is a key question. Our original approach is to combine an experimental measurement of the fragments' mass-angle correlations(More)
Visible band and Infrared (IR) band camera and vision system development has been inspired by the human and animal vision systems. This paper will discuss the development of the Electro-Optical/Infrared (EO/IR) spectrum cameras from the front end optics, the detector or photon to electron convertor, preprocessing such as non-uniformity correction, automatic(More)
In April, 2015, I was diagnosed with Non-Hodgkin Lymphoma which is a blood cancer that attacks the lymph nodes. Having recently purchased a winter home in Clearwater, Florida, in early March, 2015, I did not have a doctor network established in Florida. After having lower abdominal pains for more than a week, I went to the emergency room (ER) at the local(More)
The electro-optical Kerr effect induced by a slowly varying electric field in liquid helium at temperatures below the lambda point is investigated. The Kerr constant of liquid helium is measured to be (1.43+/-0.02(stat)+/-0.04(sys)) x 10(-20) (cm/V)(2) at T=1.5 K. Within experimental uncertainty, the Kerr constant is independent of temperature in the range(More)
This paper will discuss the problems of collecting and processing imagery across the electromagnetic spectrum from X-rays to radar. The authors in this overview paper will start at the short wave length part of the spectrum and go through the spectrum (X-rays) to the longer wavelength and Synthetic Aperture Radar (SAR) imagery and describe the problems of(More)
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