An experimental single Fourier transform optical processor applied to film grain analysis and a ship wave detection method

Download
Author
Ferguson, Robert Dale
Date
1969-12Advisor
Sackman, George L.
Second Reader
Kalmbach, Sydney H.
Metadata
Show full item recordAbstract
A single Fourier transform optical system was constructed and tested on two projects. First, film grain in a single Fourier transform operation was studied and a mathematical model of the film grain and a semi-quantitative prediction of the grain's transform were developed and verified using the experimental system. The film grain was found to have a noise-like spatial frequency spectrum which was a decreasing function of frequency, and that this spectrum could be considered Gaussian only in the case of fine grain films containing binary signal images. Second, a system was used to investigate a proposed method of detecting a ship wave. A deterministic relation between a ship wave and the Fourier transform of its photograph was shown to exist. A sample photograph of a ship wave was inserted into the system and operated on by a matched filter rotated In a plane normal to the optical axis.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Doppler-only synthetic aperture radar
Chua, Cheng Lock Charles (Monterey California. Naval Postgraduate School, 2006-12);SAR has traditionally been performed using high-range resolution data. This thesis is a proof-of-concept that the imaging process can be performed using high-doppler resolution data. The system requires a simple continuous ... -
Inferring finite-time performance in the M/G/1 queueing model
Jacobs, Patricia A.; Gaver, Donald Paul (Monterey, California. Naval Postgraduate School, 1989-01); NPS-55-89-01A single server is approached by a stream of Poisson arrivals with known arrival rate. The service times are assumed to be independent identically distributed with unknown distribution. One has available a finite sample ... -
Sonar-based localization of mobile robots using the Hough transform
Latt, Khine (Monterey, California. Naval Postgraduate School, 1997-03);For an autonomous mobile robot to navigate in an unknown environment, it is essential to know the location of the robot on a real-time basis. Finding position and orientation of a mobile robot in a world coordinate system ...