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Conference on algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XI

作者： Solyar, G Chang, CI Plaza, A Univ Maryland Baltimore Cty Dept Elect Engn & Comp Sci Remote Sensing Signal & Image Proc Lab Baltimore MD 21250 USA

ISBN: (纸本)0819457914

Projection pursuit (PP) is an interesting concept, which has been found in many applications. It uses a so-called projection index (PI) as a criterion to seek directions that may lead to interesting findings for data analysts. Unlike the principal components analysis (PCA), which uses variance as a measure to find directions that maximizes data variances, the PI used by the PP finds interesting directions that can be characterized by statistics higher than variance. As a result, the PCA is generally considered as a special case of PP with the PI particularly specified by the variance. Recently, a PP-based approach was developed by Ifarraguerri and Chang for multispectral/hyperspectral image analysis. This paper revisits their approach and investigates its application in endmember generation where endmembers can be extracted from a sequence of projections generated by PP.

关键词： algorithm development Quantization Computer simulations Calcite Hyperspectral imaging Principal component analysis Digital imaging Image compression Signal processing Computer science

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Advanced on FPA and near FPA image processing for infrared sensors

Advanced on FPA and near FPA image processing for infrared s...

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Conference on Infrared Technology and Applications XXXI

作者： Caulfield, JT Ovod, VI Coussa, RA Baxter, CR Massie, MA Cyan Syst Santa Barbara CA 93105 USA

ISBN: (纸本)081945768X

Cyan Systems has developed algorithms and architectures capable of performing temporal and spatial filtering near or on the FPA. Cyan is performing research into more advanced techniques to allow functional target detection near/on the FPA. The goals of this work is to perform image processing near or on the FPA to improve the size and power requirements for existing IR sensor systems which require larger board sets and hardware enclosures. We use representations of the biological vision system as models for the algorithm development. We report measured data on the near/on FPA target detection performance.

关键词： Staring arrays Sensors Target detection Image processing Infrared sensors Detection and tracking algorithms algorithm development Image filtering Data processing Spatial filters

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A tracking technology for security personnel and first responders

A tracking technology for security personnel and first respo...

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Conference on Sensors, and Command, Control, Communications, and Intelligence (C31) Technologies for Homeland Security and Homeland Defense IV

作者： Womble, P Barzilov, A Paschal, J Hopper, L Music, A Morgan, T Moore, R Pinson, D Schultz, F Maston, MJ Kowalik, R Western Kentucky Univ Inst Phys Appl Bowling Green KY 42101 USA

ISBN: (纸本)0819457639

Northwest Nuclear, LLC (NWN), the Applied Physics Institute (APT) at Western Kentucky University, and Crisis Prep Services, LLC (CPS) have developed a tracking technology for first responders and security personnel based upon the AeroScout (TM) system (a product of AeroScout, Inc.) and technologies developed independently by NWN, APT, and CPS. These systems provide location information using 802.11XXX architecture by measuring the time of arrival of packets from a set of active radio frequency (RF) tags to a set of location receivers. The system can track and graphically display the location on maps, drawings, floor plans or photographs of tagged items on any 802.11-compliant devices (PDAs, laptops, computers, WiFi telephones) situated both outside and inside structures. This location information would be vital for tracking the location of first responders, security, and other emergency personnel during rescue operations;particularly, under adverse conditions (e.g., fires). NWN, APT, and CPS have been improving the precision of the location measurement to an uncertainty of 20 cm or 8 inches (under certain conditions) and also developing algorithms to increase the accuracy. NWN and APT personnel have developed: 1) special tags which indicate tampering or sudden movement and transmit briefly under these conditions, and 2) permanent and portable systems which can be deployed rapidly. Additional software created by Crisis Prep Services, LLC allows response force personnel to be tracked and located inside a building in real time as well as use the software and tags as a training and rehersal system. The location of each person is depicted on a drawing of the building and is displayed on a laptop computer or any other browser capable device.

关键词： Lawrencium Security technologies Computing systems Standards development Computer security Receivers Signal attenuation algorithm development Applied physics Information security

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Discriminating man-made and natural objects in sidescan sonar imagery: human versus computer recognition performance

Discriminating man-made and natural objects in sidescan sona...

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15th Conference on Automatic Target Recognition

作者： Kessel, RT Myers, VL Def R&D Canada Halifax NS Canada

ISBN: (纸本)0819457922

Sidescan sonar is increasingly accepted as the sensor of choice for sea minehunting over large areas in shallow water. Automatic Target Recognition (ATR) algorithms are therefore being developed to assist and, in the case of autonomous vehicles, even replace the human operator as the primary recognition agent deciding whether an object in the sonar imagery is a mine or simply benign seafloor clutter. Whether ATR aids or replaces a human operator, a natural benchmark for judging the quality of ATR is the unaided human performance when ATR is not used. The benchmark can help when estimating the performance benefit (or cost) of switching from human to automatic recognition for instance, or when planning how human and machine should best interact in cooperative search operations. This paper reports a human performance study using a large library of real sonar images collected for the development and testing of ATR algorithms. The library features 234 mine-like man-made objects deployed for the purpose, as well as 105 instances of naturally occurring clutter. The human benchmark in this case is the average of ten human subjects expressed in terms of a receiver operating characteristic (ROC) curve. An ATR algorithm for man-made/natural object discrimination is also tested and compared with the human benchmark. The implications of its relative performance for the integration of ATR are considered.

关键词： Automatic target recognition Mining algorithm development Detection and tracking algorithms Target recognition Human subjects Speckle Object recognition Sensors Receivers

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Sequence Analysis In Promoter Regions

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BMC Bioinformatics 2005年第3期6卷 1-1页

作者： Jeremy Austin Cranfield University Department of Analytical Science and Informatics (DASI) Cranfield University Barton Rd Silsoe Bedfordshire MK45 4DT UK

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development of the IASI operational processing and distribution system

Development of the IASI operational processing and distribut...

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Conference on Atmospheric and Environmental Remote Sensing Data Processing and Utilization

作者： King, T Wolf, W Goldberg, M Barnet, C Sun, H Zhou, L QSS Grp Inc Lanham MD 20706 USA

ISBN: (纸本)0819454869

development and testing of the IASI processing and distribution system is currently ongoing at NOAA/NESDIS/ORA. Level I C data for 8461 channels will be available to NESDIS/NOAA from EUMETSAT shortly after MetOp 1 launch (currently scheduled for October 2005). Prior to launch, a simulation system will provide pseudo near-real time data for system testing and refinement. This will allow for a smooth and immediate system transition to the actual data processing when it becomes available. The ingested EUMETSAT level1C data will be subset both spectrally and spatially and then placed into BUFR format for a number of products including: (1) Level 1C (calibrated, apodized, and navigated) brightness temperatures, (2) cloud-cleared radiances, and (3) PCA reconstructed radiances. The subset level1C data will be delivered within three hours of observation. System validation will consist of comparing the products to collocated radiosonde observations and model forecasts.

关键词： Binary data Clouds Data acquisition Data processing Infrared radiation Data centers algorithm development Data modeling Atmospheric modeling Satellites

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development of an improved FRET imaging two-photon microscope combining lifetime and spectral imaging

Development of an improved FRET imaging two-photon microscop...

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Conference on Multiphoton Microscopy in the Biomedical Sciences IV

作者： Pelet, S Previte, MJR Kim, KH So, PTC MIT Biol Engn Div Cambridge MA 02139 USA

ISBN: (纸本)0819452319

FRET imaging is widely used in biology to map protein interactions in living cells. A number of recent technical developments promise to provide more accurate and quantitative measurement FRET efficiencies and protein bonding ratio. Using a reference FRET construct based on a doubly labeled DNA, one can estimate the accuracy of different techniques like spectral or lifetime imaging to resolve FRET. Further improvement have lead to the possibility of measuring in a single detector both spectral and lifetime information from the fluorescence emitted by the sample. We are currently building such a system based on an intensity modulated multi-anode PMT and have developed a global fitting algorithm to extract valuable information from combined spectral and lifetime imaging data sets.

关键词： Fluorescence resonance energy transfer Modulation Luminescence Imaging spectroscopy Phase shift keying Fluorescence lifetime imaging Microscopes algorithm development Proteins Phase measurement

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Automatic design of morphological operators

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JOURNAL OF ELECTRONIC IMAGING 2004年第3期13卷 486-491页

作者： Dougherty, ER Texas A&M Univ Dept Elect Engn College Stn TX 77843 USA

The key to successful morphological image processing is the selection of structuring elements. There are a myriad of algorithms for a multitude of imaging applications, but in each and every instance, algorithm performance depends on the structuring elements. The classical approach to morphological processing is to have a human being, or a group of human beings, use intuition and an understanding of the goals to design algorithms based on erosions, openings, hit-or-miss transforms, and other basic morphological operators. Some of the methods are reviewed that have been developed for automatic algorithm design, where morphological operators are designed based on sample data, structural decomposition, and criteria set by the imaging scientist. (C) 2004 SPIE and IST.

关键词： Image filtering Optimal filtering Binary data algorithm development Image processing Error analysis Electronic filtering Image resolution Nonlinear filtering Transform theory

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Wipe scene change detection and classification in video sequences

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JOURNAL OF ELECTRONIC IMAGING 2004年第2期13卷 362-375页

作者： Fernando, WAC Canagarajah, CN Brunel Univ Dept Elect & Comp Engn Uxbridge UB8 3PH Middx England Univ Bristol Image Commun Grp Bristol BS8 1UB Avon England

There is an urgent need to extract key information automatically from video for the purposes of indexing, fast retrieval, and scene analysis. To support this vision, reliable scene change detection algorithms must be developed. This paper describes a novel algorithm for wipe scene change detection in uncompressed and MPEG-1 compressed video sequences using statistical and geometric properties of each image. An efficient algorithm is also proposed to estimate statistical features in compressed video without full frame decompression. From uncompressed and MPEG compressed frames, thumbnails are obtained where pixels are the averages and variances of luminance values of macroblocks. Differences between thumbnails are computed and thresholded, and straight lines are detected in the resulting binary images. Persistence and motion of these lines indicate the presence of a shot transition using wipes. Results on video of various content types are reported and validated with the proposed schemes. Furthermore, results show that the accuracy of the detection is above 95% for uncompressed and above 90% for MPEG-1 compressed video. (C) 2004 SPIE and IST.

关键词： Video Video compression Hough transforms Binary data Detection and tracking algorithms algorithm development Image compression Statistical analysis Feature extraction Cameras

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Motion-blurred image restoration using modified inverse all-pole filters

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JOURNAL OF ELECTRONIC IMAGING 2004年第2期13卷 257-263页

作者： Likhterov, B Kopeika, NS Ben Gurion Univ Negev Dept Elect Engn IL-84105 Beer Sheva Israel

The restoration of vibration-blurred images using measured motion function is considered. Since the blurring filter is of the finite impulse response type. the inverse one is of the all-pole infinite impulse response type. Direct application of the inverse filter to restore images blurred by vibration is attractive because of reduced computation requirements. Space domain filtering allows high parallelization of the process and reduction of required processor speed. However., a pure inverse filter provides excessive noise amplification and is possibly unstable. The proposed technique is to construct a modified inverse filter with preserved all-pole structure and optimized noise and stability properties. A mathematical concept was developed using z-transform properties. An experiment testing the proposed technique was setup and the results indicate restoration is 60%-80% of that possible with ideal Wiener filtering. However, the reduced computation and high parallelization can facilitate real-time restoration. (C) 2004 SPIE and IST.

关键词： Electronic filtering Image filtering Image restoration Cameras Image quality Modulation transfer functions Solids algorithm development Motion measurement Imaging systems

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