Resumes
Resumes
Mark Rehfield Phones & Addresses
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2321 Onondaga Ave, Placentia, CA 92870
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Bullhead City, AZ
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Hemet, CA
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Corona, CA
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Brea, CA
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Anaheim, CA
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Orange, CA
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Wildomar, CA
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Riverside, CA
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Tustin, CA
Publications
Us Patents
Moving Object And Transient Event Detection Using Rotation Strip Aperture Image Measurements
View pageUS Patent:
61923222, Feb 20, 2001
Filed:
Apr 19, 1996
Appl. No.:
8/633980
Inventors:
Gerard L. Rafanelli - Fountain Valley CA
Susan B. Mount - Torrance CA
Stephen K. Johnson - Herndon VA
Marilyn A. Sperka - Rancho Palos Verdes CA
Eric B. Jensen - Hermosa Beach CA
Mark J. Rehfield - Rancho Palos Verdes CA
Susan B. Mount - Torrance CA
Stephen K. Johnson - Herndon VA
Marilyn A. Sperka - Rancho Palos Verdes CA
Eric B. Jensen - Hermosa Beach CA
Mark J. Rehfield - Rancho Palos Verdes CA
Assignee:
Raytheon Company - Lexington MA
International Classification:
G01S 1750
US Classification:
702150
Abstract:
A spinning strip aperture imaging radiometer sensor system and data processing methods for detecting moving objects derived from a plurality of image frames acquired by a strip aperture imaging sensor. A moving object in any individual image frame results in a motion smear signature in the total synthesized image. The motion smear signature is processed to detect the moving objects. One embodiment of the system comprises a rotating strip aperture telescope, a two dimensional detector array that detects images in the telescope's focal plane, a rotation compensation device that prevents rotational smear during integration time of detectors of the array, a signal processor that records a plurality of image frames of a scene imaged by the telescope as it rotates around its optical axis, and that implements method(s) for detecting the moving objects present in the recorded images. A hierarchy of moving object detection processors and methods 20 is disclosed that includes spatial, temporal, spatial frequency, and temporal frequency domain detection processors, and is compatible with multi-spectral background rejection techniques. Selection of the appropriate processing procedure and method depends upon the scenario, and the effective signal to noise ratio characteristics of the moving object.
Full Aperture Image Synthesis Using Rotating Strip Aperture Image Measurements
View pageUS Patent:
52433510, Sep 7, 1993
Filed:
Jun 25, 1992
Appl. No.:
7/904235
Inventors:
Gerard L. Rafanelli - Fountain Valley CA
Mark J. Rehfield - Rancho Palos Verdes CA
Mark J. Rehfield - Rancho Palos Verdes CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
G01S 1389
G01S 1390
G01S 1390
US Classification:
342351
Abstract:
A spinning strip aperture imaging radiometer sensor system and data processing method that is capable of synthesizing full circular aperture images from a plurality of image frames acquired by the strip aperture imaging sensor. One embodiment of the imaging system comprises a rotating strip aperture wide field of view telescope, a two dimensional detector array used to detect images in the telescope's focal plane, a rotation compensation device used to prevent rotational smear during the integration time of the detectors, a signal processor used to record a plurality of image frames of a target scene that is imaged by the telescope as it rotates around its optical axis, and a signal processor and method used to synthesize the full circular aperture image from the recorded images. The operation of the full aperture image synthesis method hinges upon the ability of the rotating strip aperture to measure all of the spatial frequencies contained in a full circular aperture image measurement. Having knowledge of the strip apertures' spatial frequency passband, and the temporal registrations of each of the recorded strip aperture images permits synthesis of the full aperture image by the sensor system and image synthesis method.