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See-through obscurants via compressive sensing in degraded visual environment 基于压缩感知的退化视觉环境下的透明遮挡物
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2178039
R. C. Lau, T. Woodward
{"title":"See-through obscurants via compressive sensing in degraded visual environment","authors":"R. C. Lau, T. Woodward","doi":"10.1117/12.2178039","DOIUrl":"https://doi.org/10.1117/12.2178039","url":null,"abstract":"This paper proposes a new approach for seeing through obscurants in a severe degraded visual environment (DVE). The proposed method allows extraction of hidden information from the raw sensor data via computational imaging technologies. We show that although to the human eye a sensor captures a zero-visibility view of an object through dense obscurants, it is possible to recover the hidden visual information of the object and display its visual cue to the aircraft pilot to aid in landing and maneuvering. The proposed approach uses a compressive sensing algorithm incorporating an over-complete dictionary composed of pose transformation of the targeted object. Information on the recovered image is used in a feedback loop to further remove perception noise and maintain tracking of the object from a moving aircraft. The proposed algorithm is sensor agnostic and can be applied to images taken from Infrared, LIDAR, or RF imagery sensors. We quantify the upper bound of the DVE noise in which the proposed method is effective via simulation results.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133240578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Time-frequency signature sparse reconstruction using chirp dictionary 基于啁啾字典的时频特征稀疏重建
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2180140
Y. Nguyen, M. Amin, M. Ghogho, D. McLernon
{"title":"Time-frequency signature sparse reconstruction using chirp dictionary","authors":"Y. Nguyen, M. Amin, M. Ghogho, D. McLernon","doi":"10.1117/12.2180140","DOIUrl":"https://doi.org/10.1117/12.2180140","url":null,"abstract":"This paper considers local sparse reconstruction of time-frequency signatures of windowed non-stationary radar returns. These signals can be considered instantaneously narrow-band, thus the local time-frequency behavior can be recovered accurately with incomplete observations. The typically employed sinusoidal dictionary induces competing requirements on window length. It confronts converse requests on the number of measurements for exact recovery, and sparsity. In this paper, we use chirp dictionary for each window position to determine the signal instantaneous frequency laws. This approach can considerably mitigate the problems of sinusoidal dictionary, and enable the utilization of longer windows for accurate time-frequency representations. It also reduces the picket fence by introducing a new factor, the chirp rate α. Simulation examples are provided, demonstrating the superior performance of local chirp dictionary over its sinusoidal counterpart.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114433919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Sparsity-based DOA estimation of coherent and uncorrelated targets using transmit/receive co-prime arrays 基于稀疏性的发射/接收共素阵列相干和不相关目标DOA估计
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177597
Elie BouDaher, F. Ahmad, M. Amin
{"title":"Sparsity-based DOA estimation of coherent and uncorrelated targets using transmit/receive co-prime arrays","authors":"Elie BouDaher, F. Ahmad, M. Amin","doi":"10.1117/12.2177597","DOIUrl":"https://doi.org/10.1117/12.2177597","url":null,"abstract":"In this paper, we use transmit/receive co-prime arrays for direction finding of mixed coherent and uncorrelated targets based on the concept of sum coarrays. The sum coarray is defined as the set of pair-wise sums of the position vectors of the elements in the transmit and receive apertures. The data measurements from the transmit/receive co-prime array are used to emulate observations at a virtual array, whose element positions are given by the sum coarray corresponding to the co-prime array. A group sparse reconstruction problem is formulated employing multiple snapshots, where each group corresponding to a specific angle of arrival extends across all the time samples. The number of resolvable targets for the proposed sparsity-based approach is limited by the number of elements in the sum coarray. Supporting simulation results are provided, which validate the effectiveness of the proposed direction finding method.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126260090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Application of holographic interferometry to in-plane and out-of-plane misalignment and deformation measurements in packaging applications 全息干涉测量在包装中的面内面外错位和变形测量中的应用
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2182306
V. Nikulin, R. Khandekar, Vijit Bedi
{"title":"Application of holographic interferometry to in-plane and out-of-plane misalignment and deformation measurements in packaging applications","authors":"V. Nikulin, R. Khandekar, Vijit Bedi","doi":"10.1117/12.2182306","DOIUrl":"https://doi.org/10.1117/12.2182306","url":null,"abstract":"Packaging of electronic and photonic components requires high accuracy, which needs to be verified in the process of manufacturing and testing. Since very small misalignments and/or deformations can lead to unacceptable performance, a measurement approach is needed that would reveal displacements as small as a few tens of nanometers or less. In addition, misalignments and deformations occur both in the out-of-plane and in-plane directions, which may be very difficult to separate from each other. It was previously demonstrated that the two types of measurements can be implemented with different approaches: holographic interferometry for out-of-plane and Moiré interferometry for in-plane, but it is very desirable to have a single system with sufficient accuracy in both lateral and longitudinal directions. An optical technique developed by our group and presented in this paper is based on a holographic approach and combines the principles of holographic interferometry and phase modulating adaptive optics that could provide in-plane and out-of-plane measurements with high accuracy.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131312615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The omni-directional image assisted optical surveillance system 全向图像辅助光学监控系统
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2176557
Yung-Hsinag Chen, C. Hwang, Wei-Chung Wang, Chun-Fu Lin
{"title":"The omni-directional image assisted optical surveillance system","authors":"Yung-Hsinag Chen, C. Hwang, Wei-Chung Wang, Chun-Fu Lin","doi":"10.1117/12.2176557","DOIUrl":"https://doi.org/10.1117/12.2176557","url":null,"abstract":"This paper presents a high resolution optical surveillance system which integrated an omni-directional imager as an event finder/ system trigger. The omni-directional optics, a fish-eye camera in this study, provides a wider field of view (FOV) which can monitor widely range continuously without scanning mechanism but offers sufficient information which includes sign of field event and direction and then drive high resolution surveillance camera for detail imaging. To archive an optical triggering surveillance system, the scale-invariant feature transform (SIFT) is implemented to detect features both from images taken by omni-directional imager and the high resolution surveillance camera. Considering the FOV of high resolution surveillance system is narrow, to ensure the pointing of high resolution surveillance system, feature matching is also implemented in this system to identify the images obtained by high resolution surveillance system are identical to the existing omni-directional image obtained from fish-eye camera. This provides a robust and accurate solution to the problem of optical radar surveillance system localization in unknown environments. An experiment is performed on outdoor image sequences with demonstrating the efficiency of our algorithm.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115966461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Composite layup monitoring using structured light 利用结构光监测复合材料铺层
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177299
R. Tait, K. Harding, C. Nafis
{"title":"Composite layup monitoring using structured light","authors":"R. Tait, K. Harding, C. Nafis","doi":"10.1117/12.2177299","DOIUrl":"https://doi.org/10.1117/12.2177299","url":null,"abstract":"The making of composite parts involves laying down multiple layers of tape in an organized manner. Misplaced ends, wrinkles or other factors can cause the part being built to have weaknesses or other imperfections. However, the actual edges of the tape do not stand out well with each layer reacting differently to lighting. The fiber nature of the tape will make the surface appear bright in some orientations and very dark in other. To complicate the problem, each layer of tape needs to be laid down at different angles, so can be dark, light or in-between, and at positions to fairly tight tolerances. This paper presents a study of several methods for determining the tape position and flaws, as well as details of a structured light method for determining the tape position. Considerations of tolerances, experimental results and how such a system might be implemented will be presented.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124312330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
3D range data compression with a virtual fringe projection system 基于虚拟条纹投影系统的三维距离数据压缩
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2179114
Song Zhang
{"title":"3D range data compression with a virtual fringe projection system","authors":"Song Zhang","doi":"10.1117/12.2179114","DOIUrl":"https://doi.org/10.1117/12.2179114","url":null,"abstract":"This paper presents our recent research on 3D range data compression using the virtual fringe projection techniques. Specifically, the virtual fringe projection system converts arbitrary 3D object into one single red, green, and blue (RGB) color image that can be further compressed using standard image compression techniques. Since the virtual fringe projection system can be ideal (e.g., no ambient lighting, no surface reflectivity variations, perfect tele-centric lens), making it convenient to apply algorithms that is difficult to be realized in a practical fringe projection system. For example, only using three fringe patterns, pixel by pixel absolute phase can be calculated without adopting a global fringe analysis techniques (e.g., Fourier transform). We will demonstrate that extremely high compression ratios can be easily achieved with the proposed method.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123789908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Phase unwrapping of fringe images for dynamic 3D measurements without additional pattern projection 无额外模式投影的动态三维测量条纹图像的相位展开
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2176822
A. Breitbarth, Eric Müller, P. Kühmstedt, G. Notni, Joachim Denzler
{"title":"Phase unwrapping of fringe images for dynamic 3D measurements without additional pattern projection","authors":"A. Breitbarth, Eric Müller, P. Kühmstedt, G. Notni, Joachim Denzler","doi":"10.1117/12.2176822","DOIUrl":"https://doi.org/10.1117/12.2176822","url":null,"abstract":"Fringe projection is an established method for contactless measurement of 3D object structure. Adversely, the coding of fringe projection is ambiguous. To determine object points with absolute position in 3D space, this coding has to be unique. We propose a novel approach of phase unwrapping without using additional pattern projection. Based on a stereo camera setup, an image segmentation of each view in areas without height jumps larger than a fringe period is necessary. Within these segments, phase unwrapping is potentially without error. Alignment of phase maps between the two views is realized by an identification process of one correspondence point.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115701161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Compressive and classical hyperspectral systems: a fundamental comparison 压缩和经典高光谱系统:基本比较
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177587
A. Shay, Isaac August, A. Stern
{"title":"Compressive and classical hyperspectral systems: a fundamental comparison","authors":"A. Shay, Isaac August, A. Stern","doi":"10.1117/12.2177587","DOIUrl":"https://doi.org/10.1117/12.2177587","url":null,"abstract":"Hyperspectral imagery involves capturing and processing a tremendous amount of data, which sets severe system resource requirements. This has motivated the application of compressive sensing for different spectroscopic and spectroscopic imager systems. Several new compressive hyperspectral architectures have been designed to stretch the common limitations of classical systems. However, the application of the compressive sensing framework involves design of system architectures that differ significantly from the conventional ones. Since compressive sensing differs essentially from conventional sensing, it cannot be implemented for hyperspectral imaging by simply modifying one of the components of a conventional hyperspectral system, rather it requires a complete new design. In this work we present a comparison between four compressive hyperspectral architectures to conventional architectures. The compressive hyperspectral sensing compared are: Coded Aperture Snapshot Spectral Imaging (CASSI), Compressive HS Imaging by Separable Spatial And Spectral Operators (CHISSS), (Liquid-crystal Compressive spectral Imager) LiCSI and (Spectral Single-Pixel) SSP systems. Those methods are compared to conventional spatial/spectral scanning hyperspectral such as pushbroom, whiskbroom and color filter techniques. A fundamental comparison between these architectures is presented in terms of optical system volume and radiometric efficiency.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132313332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The impact of oceanic gravity waves on laser propagation 海洋重力波对激光传播的影响
Sensing Technologies + Applications Pub Date : 2015-05-14 DOI: 10.1117/12.2177176
Serdar Kizilkaya, G. Walters, T. Kane
{"title":"The impact of oceanic gravity waves on laser propagation","authors":"Serdar Kizilkaya, G. Walters, T. Kane","doi":"10.1117/12.2177176","DOIUrl":"https://doi.org/10.1117/12.2177176","url":null,"abstract":"The usage of lasers in ocean studies is widespread. Each step of laser beam propagation through the ocean is a major topic to be analyzed, often independently. The objective of this study is to focus on the interaction of laser beams with the air-ocean interface; specifically, the modeling and analysis of the effects of a gravity wave perturbed ocean surface on laser propagation. The directional energy spectrum of Neumann with the Fourier series expansion is used in a Monte Carlo simulation of the gravity wave perturbed ocean surface model. Beam tracing with the ABCD matrix approach is used for the laser beam propagation analysis rather than using ray tracing like found in similar studies. Specific parameters are used in the model to output not only a qualitative model but also numerical and realistic results. The main purposes of this study are implementing a numerical model to see the effects of the ocean surface on laser propagation and analyzing the feasibility of using the beam tracing approach in such a model.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126481366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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