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Feature detection algorithms in comp...

Georgia Institute of Technology.

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Feature detection algorithms in computed images.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Feature detection algorithms in computed images./
作者:	Gurbuz, Ali Cafer.
面頁冊數:	140 p.
附註:	Adviser: James H. McClellan.
Contained By:	Dissertation Abstracts International69-09B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3327581
ISBN:	9780549801931

Feature detection algorithms in computed images.
Gurbuz, Ali Cafer.

Feature detection algorithms in computed images. - 140 p.

Adviser: James H. McClellan.

Thesis (Ph.D.)--Georgia Institute of Technology, 2008.

The problem of sensing a medium by several sensors and retrieving interesting features is a very general one. The basic framework is generally the same for applications from MRI, tomography, Radar SAR imaging to subsurface imaging, even though the data acquisition processes, sensing geometries and sensed properties are different. In this thesis we introduced a new perspective to the problem of remote sensing and information retrieval by studying the problem of subsurface imaging using GPR and seismic sensors.

ISBN: 9780549801931Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Feature detection algorithms in computed images.
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502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2008.
520 $a The problem of sensing a medium by several sensors and retrieving interesting features is a very general one. The basic framework is generally the same for applications from MRI, tomography, Radar SAR imaging to subsurface imaging, even though the data acquisition processes, sensing geometries and sensed properties are different. In this thesis we introduced a new perspective to the problem of remote sensing and information retrieval by studying the problem of subsurface imaging using GPR and seismic sensors.
520 $a We have shown that if the sensed medium is sparse in some domain then it can be imaged using many fewer measurements than required by the standard methods. This leads to much lower data acquisition times and better images. We have used the ideas from Compressive Sensing, which show that a small number of random measurements about a signal are sufficient to completely characterize it, if the signal is sparse or compressible in some domain. Although we have applied our ideas to the subsurface imaging problem, our results are general and can be extended to other remote sensing applications.
520 $a A second objective in remote sensing is information retrieval which involves searching for important features in the computed image. In this thesis we focus on detecting buried structures like pipes, and tunnels in computed GPR or seismic images. The problem of finding these structures in high clutter and noise conditions, and finding them faster than the standard shape detecting methods is analyzed. One of the most important contributions of this thesis is where the sensing and the information retrieval stages are unified in a single framework using compressive sensing. Instead of taking lots of standard measurements to compute the image of the medium and search the necessary information in the computed image, only a small number of measurements as random projections are used to infer the information without generating the image of the medium.
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