Ut-battelle, Inc.

Lorenzo Fabris

Thomas P Karnowski

Timothy F Gee

Klaus-peter Ziock

Mark F Cunningham

James Samuel Goddard, Jr

James S Goddard

Paul B Rose, Jr

Gianluigi De Geronimo

Frezghi H Ghebretati, Jr

James T Matta

An application specific integrated circuit includes a differential amplifier and a first pulse shaper that generate a full integration of an amplified radiation detection signal. A second pulse shaper generate a partial integration of the amplified radiation signal. A third pulse shaper generates a timing signal simultaneously with the partial integration and the full integration. Peak detectors measure and store maximum values of the full integration and the partial integration. A time to amplitude converter measures an incidence of a radiological event that generated the radiation detection signal in the form of a voltage ramp. A controller enables the transfer of the maximum value of the full and partial integrations and the voltage in response to discriminated values.

Pulse shape discrimination system for high density imaging

Multiple homography transformations corresponding to different heights are generated in the field of view. A group of salient points within a common estimated height range is identified in a time series of video images of a moving object. Inter-salient point distances are measured for the group of salient points under the multiple homography transformations corresponding to the different heights. Variations in the inter-salient point distances under the multiple homography transformations are compared. The height of the group of salient points is estimated to be the height corresponding to the homography transformation that minimizes the variations.

Estimating vehicle height using homographic projections

The relationship between the high energy radiation imager pixel (HERIP) coordinate and real-world x-coordinate is determined by a least square fit between the HERIP x-coordinate and the measured real-world x-coordinates of calibration markers that emit high energy radiation imager and reflect visible light. Upon calibration, a high energy radiation imager pixel position may be determined based on a real-world coordinate of a moving vehicle. Further, a scale parameter for said high energy radiation imager may be determined based on the real-world coordinate. The scale parameter depends on the y-coordinate of the moving vehicle as provided by a visible light camera. The high energy radiation imager may be employed to detect radiation from moving vehicles in multiple lanes, which correspondingly have different distances to the high energy radiation imager.

Calibration method for video and radiation imagers

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Knoxville, TN, United States of America

Lorenzo Fabris