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CEOS precipitation constellation

CEOS precipitation constellation

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Conference on Sensors, Systems, and Next-Generation Satellites XI

作者： Neeck, Steven P. Oki, Riko NASA Headquarters Washington DC 20546 USA JAXA Earth Observ Res Ctr Tsukuba Ibaraki 3058585 Japan

ISBN: (纸本)9780819469021

The outcomes of the 19th Committee on Earth Observing Satellites (CEOS) Plenary held in London in November 2005 1,2, recognized that the CEOS Implementation Plan for Space-Based Observations for Global Earth Observation System of Systems (GEOSS) should: identify the supply of space-based observations required to satisfy the requirements expressed by the 10-year implementation plan for GEOSS(3);and propose an innovative process whereby the many disparate types of Earth observing programs funded by CEOS Member agencies might contribute to the supply of the required observations. The CEOS Task Force charged with drafting the CEOS Implementation Plan for Space-Based Observations for GEOSS focused its early efforts on the creation of a 'new planning process' which would satisfy the various criteria demanded by member space agencies, and which would hopefully encourage a new phase of specificity and focus in the multi-lateral co-operation efforts undertaken by space agencies under the CEOS umbrella - resulting in improved engagement of all CEOS Members and real implementation results. The CEOS Constellations is the title given to this new process, and four pilot studies have been initiated in order to pioneer and test the concept. The Japan Aerospace Exploration Agency (JAXA) and the National Aeronautics and Space Administration (NASA) were selected as the lead agencies for the study of the development of a CEOS Precipitation Constellation with the support of other CEOS space agency and user community participants. The goals, approach, and anticipated outcomes for the study will be discussed.

关键词： Satellites Sensors Climatology Standards development Satellite communications Data archive systems Microwave radiation Prototyping algorithm development Environmental sensing

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Crosscoupling power optimal wire spacing in quasilinear runtime

Crosscoupling power optimal wire spacing in quasilinear runt...

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Conference on VLSI Circuits and Systems III

作者： Zuber, Paul Ilnseher, Thomas Stechele, Walter Tech Univ Munich Inst Integrated Syst Munich Germany

ISBN: (纸本)9780819467188

A new quasilinear algorithm for solving the crosscoupling power optimal wire spacing problem is developed. Contrasted to state of the art solutions, the proposed method not only guarantees optimality of the solution, but also achieves improvements of more than five orders of magnitude in runtime. In addition, the algorithm is modified to river-route the wire endings to their initial positions, allowing it to optimize the wire topology of entire detail-routed standard cell circuits. Extensive replicable experiments assess the effectivity of the methods for a wide ran-e of real-world circuit examples of which the wire switching power is reduced locally by up to 50% and chip-wide by up to 8.3%.

关键词： Switching Capacitance Computer programming algorithm development Video Binary data Manufacturing Signal processing Optimization (mathematics) Video processing

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New Vistas in Image and Video Quality Assessment

New Vistas in Image and Video Quality Assessment

引用

Conference on Human Vision and Electronic Imaging XII

作者： Seshadrinathan, Kalpana Bovik, Alan C. Univ Texas LIVE Austin TX 78712 USA

ISBN: (纸本)9780819466051

In this Keynote Address paper, we review early work on Image and Video Quality Assessment against the backdrop of an interpretation of image perception as a visual communication problem. As a way of explaining our recent work on Video Quality Assessment, we first describe our recent successful advances on QA algorithms for still images, specifically, the Structural SIMilarity (SSIM) Index and the Visual Information Fidelity (VIF) Index. We then describe our efforts towards extending these Image Quality Assessment frameworks to the much more complex problem of Video Quality Assessment. We also discuss our current efforts towards the design and construction of a generic and publicly-available Video Quality Assessment database.

关键词： Video Image quality Distortion Databases Visualization Image processing Image transmission algorithm development Image compression Receivers

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Dwi-detector optical sensor for measuring the concentration of total suspended solids in waters

Dwi-detector optical sensor for measuring the concentration ...

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Conference on Signal Processing, Sensor Fusion, and Target Recognition XVI

作者： Daraigan, S. G. MatJafri, M. Z. Abdullah, K. Lim, H. S. Hashim, S. A. Univ Sains Malaysia Sch Phys Minden 11800 Penang Malaysia HUST Dept Phys Fac Sci Mukalla Yemen

ISBN: (纸本)9780819466891

The design of optical sensor systems is based on the interaction between the photons of the electromagnetic radiation and suspended particles in water. The objectives of this study area are to design and develop a dwi-detector optical sensor for measuring the concentration of total suspended solids, TSS, in polluted water samples. An algorithm which requires calibration analysis has been derived for estimating TSS concentrations. The proposed optical system uses a single light emitting diode, LED, as an emitter and two phototransistors are used as detectors. Detected radiations were measured at scattering angles of 900 and 1800 between the source and the detectors. The algorithm produced a high correlation coefficient and low root mean square error value.

关键词： Optical sensors Solids Light scattering Sensors Light emitting diodes Scattering Detection and tracking algorithms Particles Absorption algorithm development

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Two different approaches for attacking BOWS

Two different approaches for attacking BOWS

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9th Conference on Security, Steganigraphy, and Watermarking of Multimedia Contents

作者： Comesana, Pedro Perez-Gonzalez, Fernando Univ Vigo Dept Teoria Senal & Comun ETSI Telecom E-36310 Vigo Spain

ISBN: (纸本)9780819466181

From December 15, 2005 to June 15, 2006 the watermarking community was challenged to remove the watermark from 3 different 512 x 512 watermarked images while maximizing the Peak Signal to Noise Ratio (PSNR) measured by comparing the watermarked signals with their attacked counterparts. This challenge, which bore the inviting name of Break Our Watermarking System (BOWS),(1) and was part of the activities of the European Network of Excellence ECRYPT, had as its main objective to enlarge the current knowledge on attacks to watermarking systems;in this sense, BOWS was not aimed at checking the vulnerability of the specific chosen watermarking scheme against attacks, but to inquire in the different strategies the attackers would follow to achieve their target. In this paper the main results obtained by the authors when attacking the BOWS system are introduced. Mainly, the strategies followed can be divided into two different approaches: blind sensitivity attacks and exhaustive search of the secret key.

关键词： Digital watermarking Sensors Distortion Signal detection Binary data Detection and tracking algorithms Signal to noise ratio algorithm development Information security Signal processing

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A comparative study and analysis between vertex component analysis and orthogonal subspace projection for endmember extraction

A comparative study and analysis between vertex component an...

引用

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

作者： Wu, Chao-Cheng Liu, Weimin Ren, Hsuan Chang, Chein-I. Univ Maryland Baltimore Cty Dept Comp Sci & Elect Engn Remote Sensing Signal & Image Proc Lab Baltimore MD 21250 USA Natl Cent Univ Ctr space & Remote sensing Res Chungli Taiwan

ISBN: (纸本)9780819466877

Endmember extraction has received considerable interest in recent years. Of particular interest is the Pixel Purity Index (PPI) because of its publicity and availability in ENVI software. There are also many variants of the PPI have been developed. Among them is an interesting endmember extraction algorithm (EEA), called vertex component analysis (VCA) developed by Dias and Nascimento who extend the PPI to a simplex-based EEA while using orthogonal subspace projection (OSP) as a projection criterion rather than simplex volume used by another well-known EEA, N-finder algorithm (N-FINDR) developed by Winter. Interestingly, this paper will show that the VCA is essentially the same algorithm, referred to as Automatic Target Generation Process (ATGP) recently developed for automatic target detection and classification by Ren and Chang except the use of the initial condition to initialize the algorithm. In order to substantiate our findings, experiments using synthetic and real images are conducted for a comparative study and analysis.

关键词： algorithm development Minerals Detection and tracking algorithms Principal component analysis Independent component analysis Target detection Signal to noise ratio Calcite Reflectivity Remote sensing

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Image reconstruction from rebinned helical cone-beam projection data

Image reconstruction from rebinned helical cone-beam project...

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Medical Imaging 2007 Conference

作者： Xia, Dan Yu, Lifeng Bian, Junguo Pan, Xiaochuan Univ Chicago Dept Radiol 5841 S Maryland Ave Chicago IL 60637 USA

ISBN: (纸本)9780819466280

In this work;we introduced an algorithm for image reconstruction in helical cone-beam CT based upon the backprojection-filtration (BPF) algorithm. This algorithm is a backprojection-filtration-type algorithm that reconstructs images from rebinned data. It retains the properties of the original BPF algorithm in that it;requires minimum data and can reconstruct. ROI images from truncated data. More importantly, due to the elimination of the spatially-variant weighting factor in the backprojection, it, may improve the noise properties in reconstructed images. We have performed computer-simulation studies to investigate the ROI-image reconstruction and noise properties of this algorithm, and the;quantitative results verify and demonstrate the proposed algorithm.

关键词： Reconstruction algorithms Image segmentation algorithm development Image processing algorithms and systems Data acquisition Image restoration 3D image reconstruction Sensors Computed tomography Image filtering

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The multi-objective constrained assignment problem

The multi-objective constrained assignment problem

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Conference on Evolutionary and Bio-Inspired Computation - Theory and Applications

作者： Kleeman, Mark P. Lamont, Gary B. USAF Inst Technol Dept Elect & Comp Engn Grad Sch Engn & Management Wright Patterson AFB OH 45433 USA

ISBN: (纸本)9780819466853

Assignment problems are a common area of research in operational research and computer science. Military applications include military personnel assignment, combat radio frequency assignment, and weapon target assignment. In general, assignment problems can be found in a wide array of areas, from modular placement to resource scheduling. Many of these problems are very similar to one another. This paper models and compares some of the assignment problems in literature. These similar problems are then generalized into a generalized multi-objective problem, the constrained assignment problem. Using a multi-objective genetic algorithm, we solve an example of a constrained assignment problem called the airman assignment problem. Results show that good solutions along the interior portion of the Pareto front are found in earlier generations and later generations produce more exterior points.

关键词： algorithm development Evolutionary algorithms Genetic algorithms Defense technologies Mathematical modeling Weapons Computer science Scientific research Unmanned aerial vehicles Computer engineering

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The application of image processing techniques and technology for security and surveillance applications

The application of image processing techniques and technolog...

引用

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

作者： Smith, Moira I. Hickman, Duncan Waterfall Solut Ltd Guildford GU2 9JX Surrey England

ISBN: (纸本)9780819466600

The range and scope of EO/IR sensor systems within security and surveillance applications is growing, and this places a corresponding demand on the image processing functionality required to meet the end-users' needs and requirements. Within this paper, the application of different image processing architectures and techniques is reviewed in terms of situational awareness criteria and is illustrated through specific system applications. The concepts and benefits of multimodal and distributed sensor systems are also considered together with the attendant data registration and fusion techniques. Finally, the exploitation of a priori information within the integrated security and surveillance picture is considered from both a processing technology and image display perspective.

关键词： Image processing Sensors Image fusion Imaging systems Image registration Image sensors Surveillance Image enhancement algorithm development Image quality

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A new lossless compression algorithm for satellite earth science multi-spectral imagers - art. no. 668307

A new lossless compression algorithm for satellite earth sci...

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Conference on Satellite Data Compression, Communications, and Archiving III

作者： Gladkova, Irina Gottipati, Srikanth Grossberg, Michael CCNY NOAA CREST New York NY 10031 USA

ISBN: (纸本)9780819468314

Multispectral imaging is becoming an increasingly important tool for monitoring the earth and its environment from space borne and airborne platforms. Multispectral imaging data consists of visible and IR measurements from a scene across space and spectrum. Growing data rates resulting from faster scanning and finer spatial and spectral resolution makes compression an increasingly critical tool to reduce data volume for transmission and archiving. Examples of multispectral sensors we consider include the NASA 36 band MODIS imager, Meteosat 2nd generation 12 band SEVIRI imager, GOES R series 16 band ABI imager, current generation GOES 5 band imager, and Japan's 5 band MTSAT imager. Conventional lossless compression algorithms are not able to reach satisfactory compression ratios nor are they near the upper limits for lossless compression on imager data as estimated from the Shannon entropy. We introduce a new lossless compression algorithm developed for the NOAA-NESDIS satellite based Earth science multispectral imagers. The algorithm is based on capturing spectral correlations using spectral prediction, and spatial correlations with a linear transform encoder. The algorithm as presented has been designed to work with NOAA's scientific data and so is purely lossless but lossy modes can be supported. The compression algorithm also structures the data in a way that makes it easy to incorporate robust error correction using FEC coding methods as TPC and LDPC for satellite use. This research was funded by NOAA-NESDIS for its Earth observing satellite program and NOAA goals.

关键词： Image compression Imaging systems Sensors MODIS Satellites algorithm development JPEG2000 Image processing Satellite imaging Earth sciences

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