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Superresolution of buried objects in...

Lehman, Sean Kenneth.

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Superresolution of buried objects in layered media by near-field electromagnetic imaging.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Superresolution of buried objects in layered media by near-field electromagnetic imaging./
作者:	Lehman, Sean Kenneth.
面頁冊數:	243 p.
附註:	Source: Dissertation Abstracts International, Volume: 61-09, Section: B, page: 4887.
Contained By:	Dissertation Abstracts International61-09B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9987480
ISBN:	0599943343

Superresolution of buried objects in layered media by near-field electromagnetic imaging.
Lehman, Sean Kenneth.

Superresolution of buried objects in layered media by near-field electromagnetic imaging. - 243 p.

Source: Dissertation Abstracts International, Volume: 61-09, Section: B, page: 4887.

Thesis (Ph.D.)--University of California, Davis, 2000.

In non-invasive wave&dagger; probing of layered media in near field conditions, few researchers outside of optical microscopists have taken advantage of the evanescent part of the scattered field to enhance resolution. In this dissertation, we propose and develop an imaging technique to be used in near-field environments which achieves resolution beyond the diffraction limit, or equivalently "superresolution," by including the evanescent part of the field backscattered from objects buried in the medium.

ISBN: 0599943343Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Superresolution of buried objects in layered media by near-field electromagnetic imaging.
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245 1 0 $a Superresolution of buried objects in layered media by near-field electromagnetic imaging.
300 $a 243 p.
500 $a Source: Dissertation Abstracts International, Volume: 61-09, Section: B, page: 4887.
500 $a Adviser: Garry Rodrigue.
502 $a Thesis (Ph.D.)--University of California, Davis, 2000.
520 $a In non-invasive wave&dagger; probing of layered media in near field conditions, few researchers outside of optical microscopists have taken advantage of the evanescent part of the scattered field to enhance resolution. In this dissertation, we propose and develop an imaging technique to be used in near-field environments which achieves resolution beyond the diffraction limit, or equivalently "superresolution," by including the evanescent part of the field backscattered from objects buried in the medium.
520 $a In Chapter 1, we discuss the nature of non-invasive wave probing of objects and introduce the concept of tomography. Tomographic imaging is a collection of techniques to reconstruct images of the unknown internal structure of an object from fields transmitted through, and/or reflected from it. We develop two widely used tomographic techniques: projection tomography and plane to plane backpropagation.
520 $a In Chapter 2, we introduce and develop the concept of inhomogeneous diffraction tomography, the area with which this dissertation is concerned. We show the most widely used diffraction tomography technique is resolution limited to approximately a half wavelength.
520 $a In Chapter 3, we study the forward scattering process in order to develop a new diffraction tomography imaging technique which achieves resolution beyond the classical limit. We propose and prove a new theorem which explains why the diffraction tomography method of Chapter 2 is resolution limited. We then derive a total field scattering relation which includes both propagating and evanescent field components.
520 $a In Chapter 4, we develop a new reconstruction algorithm which is based upon the total field scattering relation. This full field tomographic reconstruction algorithm includes both propagating and evanescent field components.
520 $a In Chapter 5, we present reconstruction results from both simulated and real wide-band radar data which demonstrate our new algorithm surpasses the resolution of most current techniques.
520 $a In Chapter 6, we state our conclusions and list avenues of further work.
520 $a &dagger;Either electromagnetic or acoustic waves
590 $a School code: 0029.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, General. $3 1018488
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791 $a Ph.D.
792 $a 2000
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