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Attribute Invariant Spatial and Spatio-Temporal Correlators- [electronic resource]
Attribute Invariant Spatial and Spatio-Temporal Correlators- [electronic resource]
상세정보
- 자료유형
- 학위논문(국외)
- 자관 청구기호
- 기본표목-개인명
- 표제와 책임표시사항
- Attribute Invariant Spatial and Spatio-Temporal Correlators - [electronic resource] / Monjur, Mehjabin Sultana.
- 발행, 배포, 간사 사항
- 형태사항
- 1 online resource(188 p)
- 일반주기
- Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
- 일반주기
- Adviser: Selim M. Shahriar.
- 학위논문주기
- Thesis (Ph.D.)--Northwestern University, 2016.
- 요약 등 주기
- 요약Target identification and tracking is important in many defense and civilian applications. Optical correlators provide a simple technique for fast verification and identification of data. The primary limitation of such Conventional Holographic Correlators (CHC) is the poor nature of the material used for recording. We develop the concept and design of, and demonstrate experimentally, a Hybrid Opto-electronic Correlator (HOC) using only photo-detectors, Spatial Light Modulator (SLM) and VLSI chips that overcomes the material problems of the CHC. In the HOC, the amplitude and phase information of the query as well as the reference image is recorded with photo-detectors via interference with plane waves. The output of such an HOC has four terms: two convolution signals and two cross-correlation signals. We show through simulation and experimental results, that the correlation signal depends non-trivially on both the relative and the absolute phases of these two plane waves at the planes of interference. We also demonstrate experimentally, a functional HOC for identical and different reference and query images under optimized phase conditions. We develop a technique for controlling and optimizing the output signal, such that the convolution terms can be eliminated, by using a single servo, aided by repeated calibrations with known objects and reference images, interlaced with the actual correlator operation. In addition, To achieve the ultimate speed of such a correlator, we also propose an integrated graphic processing unit which would perform all the electrical processes in a parallel manner. We also show that the HOC is capable of detecting objects in a scale and rotation invariant manner, along with the shift invariance feature, by incorporating Polar Mellin Transform (PMT). Furthermore, we demonstrate how to carry out shift, rotation and scale invariant detection of multiple matching objects simultaneously, a process previously thought to be incompatible with the PMT based correlators.
- 요약 등 주기
- 요약We also develop the concept and design of an Automatic Event Recognition (AER) System based on a three-dimensional Spatio-Temporal Correlator (STC), that combines the techniques of holographic correlation and photon echo based temporal pattern recognition to match a video-clip contained in a video file, using atoms stored in a porous-glass material. By employing the nonlinear properties of inhomogenous broadened atomic media we show that it is possible to realize an AER system that can recognize rapidly the occurrence of events, the number of events, and the occurrence times. To model the response of such a system, one requires solving the Schrodinger Equation (SE), which is a computationally extensive task. We develop an analytical model to find the response of the STC and show that the analytical model agrees closely with the results obtained via explicit numerical simulation, but at a speed that is many orders of magnitude faster than the numerical model. We also show how such a practical AER system can be realized using a combination of a porous-glass based Rb vapor cell, a holographic video disc, and a lithium niobate crystal.
- 주제명부출표목-일반주제명
- 주제명부출표목-일반주제명
- 부출표목-단체명
- 기본자료저록
- Dissertation Abstracts International. 78-05B(E).
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 원문정보보기
- 소장사항
-
20170404 2017
MARC
008170601s2016 us esm 001c eng■001MOKWON01254225
■00520170418120235
■007cr
■020 ▼a9781369447903
■035 ▼a(MiAaPQ)AAI10193893
■040 ▼aMiAaPQ▼cMiAaPQ
■090 ▼a전자도서(박사논문)
■1001 ▼aMonjur, Mehjabin Sultana.
■24510▼aAttribute Invariant Spatial and Spatio-Temporal Correlators▼h[electronic resource]▼cMonjur, Mehjabin Sultana.
■260 ▼a[Sl]▼bNorthwestern University▼c2016
■300 ▼a1 online resource(188 p)
■500 ▼aSource: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
■500 ▼aAdviser: Selim M. Shahriar.
■5021 ▼aThesis (Ph.D.)--Northwestern University, 2016.
■520 ▼aTarget identification and tracking is important in many defense and civilian applications. Optical correlators provide a simple technique for fast verification and identification of data. The primary limitation of such Conventional Holographic Correlators (CHC) is the poor nature of the material used for recording. We develop the concept and design of, and demonstrate experimentally, a Hybrid Opto-electronic Correlator (HOC) using only photo-detectors, Spatial Light Modulator (SLM) and VLSI chips that overcomes the material problems of the CHC. In the HOC, the amplitude and phase information of the query as well as the reference image is recorded with photo-detectors via interference with plane waves. The output of such an HOC has four terms: two convolution signals and two cross-correlation signals. We show through simulation and experimental results, that the correlation signal depends non-trivially on both the relative and the absolute phases of these two plane waves at the planes of interference. We also demonstrate experimentally, a functional HOC for identical and different reference and query images under optimized phase conditions. We develop a technique for controlling and optimizing the output signal, such that the convolution terms can be eliminated, by using a single servo, aided by repeated calibrations with known objects and reference images, interlaced with the actual correlator operation. In addition, To achieve the ultimate speed of such a correlator, we also propose an integrated graphic processing unit which would perform all the electrical processes in a parallel manner. We also show that the HOC is capable of detecting objects in a scale and rotation invariant manner, along with the shift invariance feature, by incorporating Polar Mellin Transform (PMT). Furthermore, we demonstrate how to carry out shift, rotation and scale invariant detection of multiple matching objects simultaneously, a process previously thought to be incompatible with the PMT based correlators.
■520 ▼aWe also develop the concept and design of an Automatic Event Recognition (AER) System based on a three-dimensional Spatio-Temporal Correlator (STC), that combines the techniques of holographic correlation and photon echo based temporal pattern recognition to match a video-clip contained in a video file, using atoms stored in a porous-glass material. By employing the nonlinear properties of inhomogenous broadened atomic media we show that it is possible to realize an AER system that can recognize rapidly the occurrence of events, the number of events, and the occurrence times. To model the response of such a system, one requires solving the Schrodinger Equation (SE), which is a computationally extensive task. We develop an analytical model to find the response of the STC and show that the analytical model agrees closely with the results obtained via explicit numerical simulation, but at a speed that is many orders of magnitude faster than the numerical model. We also show how such a practical AER system can be realized using a combination of a porous-glass based Rb vapor cell, a holographic video disc, and a lithium niobate crystal.
■590 ▼aSchool code: 0163.
■650 4▼aElectrical engineering
■650 4▼aOptics
■690 ▼a0544
■690 ▼a0752
■71020▼aNorthwestern University▼bElectrical Engineering.
■7730 ▼tDissertation Abstracts International▼g78-05B(E).
■773 ▼tDissertation Abstract International
■790 ▼a0163
■791 ▼aPh.D.
■792 ▼a2016
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T14489976▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a20170404▼f2017
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