2012 IEEE International Conference on Imaging Systems and Techniques Proceedings最新文献_第10页

Spectral characterization of a hyperspectral imaging system using optical standards 使用光学标准的高光谱成像系统的光谱特性

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295579

M. Mehrubeoglu

{"title":"Spectral characterization of a hyperspectral imaging system using optical standards","authors":"M. Mehrubeoglu","doi":"10.1109/IST.2012.6295579","DOIUrl":"https://doi.org/10.1109/IST.2012.6295579","url":null,"abstract":"Hyperspectral imaging relies on the optical properties of materials which absorb or scatter light at different wavelengths. To obtain repeatable results from a hyperspectral or any other imaging system, the system's spectral response must be characterized using optical standards against the light source used. Light sources vary in their spectral properties and their performance over time. Differences in light sources, such as intensity or emitted wavelengths, can affect the acquired data; however, through calibration and data normalization, such effects can be minimized. Knowing the imager's spectral response to the light source is vital for analyzing hyperspectral data and interpreting the results from the media of interest. In this study, the spectral response of the hyperspectral imaging system to tungsten halogen diffuse light source is determined in reflection and transmission modes using optical standards of varying thickness. In addition, the system's response to the same light source over time is investigated. The noise levels in single and averaged spectra are measured and reported. System normalization methods are described. For the tested hyperspectral imaging system and light source, the noise reduces in averaged spectra across multiple spectra compared to single spectra. Spectral peak shifts have also been observed at different light source power levels.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134265013","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

Techniques for electrical tree imaging 电树成像技术

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295555

R. Schurch, S. Rowland, P. Withers

引用次数: 8

Automatic informative tissue's discriminators in WCE WCE中自动信息组织鉴别器

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295538

Omid Haji-Maghsoudi, Alireza Talebpour, Hamid Soltanian-Zadeh, Hossein Asl Soleimani

{"title":"Automatic informative tissue's discriminators in WCE","authors":"Omid Haji-Maghsoudi, Alireza Talebpour, Hamid Soltanian-Zadeh, Hossein Asl Soleimani","doi":"10.1109/IST.2012.6295538","DOIUrl":"https://doi.org/10.1109/IST.2012.6295538","url":null,"abstract":"Wireless capsule endoscopy (WCE) is a new device which investigates the entire gastrointestinal (GI) and especially small bowel. About 55000 frames are recorded in an examination for a capsule which captures two frames per second. Thus, it is essential to find an automatic and intelligent method to help physicians. The WCE videos have lots of uninformative parts (such as extraneous matters, bubbled, and dark part), so preprocessing is necessary to separate these uninformative regions in a frame or reduce frames' numbers. In this paper, we introduce two novel methods to detect automatically uninformative parts. In order to achieve this goal, we use two Mathematical Morphological operations, sigmoid function as a method to segment regions, statistic features, Gabor filters, fisher score test to reduce number of features, neural network and discriminators in color space. Our experimental studies indicates that precision, sensitivity, accuracy, and specificity are respectively 96.13%, 95.30%, 96.35% and 97.00% in the first method, and 90.17%, 95.68%, 93.72%, and 92.71%, respectively in the second method.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116507014","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

Estimation of cluster centers on building roof from LiDAR footprints 基于激光雷达足迹的建筑物屋顶聚类中心估计

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295541

Deming Kong, Lijun Xu, Xiaolu Li, Weiwei Xing

引用次数: 6

Automatic segmentation of pediatric brain MRIs using a maximum probability pediatric atlas 使用最大概率儿童图谱的儿童脑核磁共振成像自动分割

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295511

I. S. Gousias, A. Hammers, S. Counsell, A. Edwards, D. Rueckert

引用次数: 6

Hyperspectral imaging and analysis of mixed algae species in liquid media 液体介质中混合藻类的高光谱成像与分析

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295535

M. Mehrubeoglu, Ming Yang Teng, M. Savage, A. Rafalski, P. Zimba

引用次数: 6

Demodulated resonance technique in fault diagnosis of high speed line rolling-mill synchromesh gears 解调共振技术在高速连轧同步齿轮故障诊断中的应用

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295526

Fengxing Zhou, Baokang Yan

引用次数: 2

MIMO FMCW SAR system using beat-frequency division waveforms MIMO FMCW SAR系统采用热分频波形

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295554

Jie Wang, Longyong Chen, Xing-dong Liang, Wen Hong, Lideng Wei

{"title":"MIMO FMCW SAR system using beat-frequency division waveforms","authors":"Jie Wang, Longyong Chen, Xing-dong Liang, Wen Hong, Lideng Wei","doi":"10.1109/IST.2012.6295554","DOIUrl":"https://doi.org/10.1109/IST.2012.6295554","url":null,"abstract":"Special attention has been devoted to the lightweight, cost effective frequency modulated continuous wave (FMCW) synthetic aperture radar (SAR) in recent years. However, FMCW SAR is not feasible in the case of wider swath or higher Doppler bandwidth, because the loss of range resolution is dramatic and the system sampling rate is high. By using the technique of multi-input multi-output (MIMO), the pulse repetition frequency (PRF) of the system can be reduced dramatically without causing azimuth ambiguities. Consequently, the sweep cycle is increased, the system sampling rate is reduced, the loss of range resolution is negligible and the transmitter-receiver isolation is sufficient. The orthogonal signal transmitted in the system is beat-frequency division waveform. As the bandwidth of the beat signal is much smaller than the signal bandwidth and radio frequency (RF) carrier frequency, the difference between the transmitted signals wavelength is negligible, and the residual phase error caused by compensating phase shift can be ignored. Theoretical analysis and simulation results illustrate the feasibility of this system.","PeriodicalId":213330,"journal":{"name":"2012 IEEE International Conference on Imaging Systems and Techniques Proceedings","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114075177","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: 3

Frequency selection for compounding synthetic aperture ultrasound images 复合合成孔径超声图像的频率选择

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295514

J. R. B. Taylor, J. J. M. Chan, G. Thomas

引用次数: 2

Parameter estimation from tomographic data using self-organising maps 利用自组织图对层析数据进行参数估计

2012 IEEE International Conference on Imaging Systems and Techniques Proceedings Pub Date : 2012-07-16 DOI: 10.1109/IST.2012.6295588

T. York, Aniediobong Jonah Ukpong, S. Mylvaganam, Yanyun Ru

引用次数: 3