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Fast audio watermarking: Concepts and realizations

Fast audio watermarking: Concepts and realizations

引用

6th Conference on Watermarking of Multimedia Contents

作者： Arnold, M Huang, ZW Fraunhofer-Institut fur Graphische Datenverarbeitung (Germany)

ISBN: (纸本)0819452092

In this paper we present concepts and corresponding implemenations to maximize the speed of audio watermarking encoders in order to be applicable in different scenarios. To motivate the development and implementation of fast audio watermarking encoders, application scenarios requiring high embedding speed are presented. Different concepts with assumptions concerning the underlying watermarking algorithms are discussed. The paper presents the necessary audio stream preparation and the corresponding implementation realizing the fast audio watermarking methods. The quality of the watermarked audio tracks and the robustness of the embedded watermarks will be verified by experimental tests. Enhancements of the fundamental principle concerning the distribution of audio tracks are discussed.

关键词： Digital watermarking Computer programming Compact discs Signal processing algorithm development Electronic filtering Optical filters Detection and tracking algorithms Interference (communication) Real-time computing

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Satellite ocean remote sensing at NOAA/NESDIS

Satellite ocean remote sensing at NOAA/NESDIS

引用

Conference on Atmospheric and Environmental Remote Sensing Data Processing and Utilization

作者： Bayler, EJ NOAA NESDIS Ctr Satellite Applicat & Res Camp Springs MD 20746 USA

ISBN: (纸本)0819454869

Satellite oceanography within the Center for Satellite Applications and Research (STAR) in National Oceanic and Atmospheric Administrationis (NOAA) National Environmental Satellite, Data, and Information Service (NESDIS) focuses on observation retrievals and applications to address the NOAA missions of environmental assessment, prediction, and stewardship. Satellite oceanography within NOAA/NESDIS is an end-to-end process, addressing user requirements, sensor design support, observation retrieval research and development, calibration, applications and product research and development, the transition of research to operations, continuing product validation, and operational user support. The breadth of scientific investigation encompasses three functional areas: satellite ocean sensors, ocean dynamics/data assimilation, and marine ecosystems/climate. A cross-cutting science team from these functional areas has been established for each core subject: sea-surface temperature, sea-surface height, sea-surface roughness, ocean color, ocean surface winds, and sea ice. These science teams pursue the science and issues end to end within the core subject, with the primary objective being the transition of research to operations. Data fusion opportunities between science teams are also pursued. Each science team area addresses the common themes of calibration/validation, data assimilation, climate, and operational oceanography. Experimental and operational products, as well as user support, are provided to the user community via the NOAA OceanWatch/CoastWatch program.

关键词： Satellites Oceanography Remote sensing Climatology Data modeling algorithm development Environmental sensing Sensors Calibration Ocean optics

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Calculations of vacancy binding energies to Cu-V complexes in FeCu alloys

引用

7th International Workshop on Nondestructive Testing and Computer Simulations in Science and Engineering

作者： Kulikov, DV Malerba, L Khrushcheva, OY Russian Acad Sci AF Ioffe Physicotech Inst St Petersburg 194021 Russia

ISBN: (纸本)0819453234

The binding energies of vacancies to copper-vacany clusters in ferritic alloys containing Cu are of great importance as parameters for Object Kinetic Monte Carlo (OKMC) or Rate Equation (RE) models for the prediction of Cu precipitation under irradiation. Copper-vacancy complexes created after irradiation influence the mechanic properties of irradiated steels since they are obstacles to dislocation motion and lead to hardening and embrittlement of the material. The main purpose of this work is to find an efficient computational procedure to perform the calculation of copper-vacancy complex formation energies and corresponding vacancy binding energies in bcc Fe-Cu alloys, in order to calculate a whole matrix of values, from small to large complex sizes.

关键词： Copper Iron Chemical species Monte Carlo methods algorithm development Coating Computer simulations Mechanics Motion models Nuclear physics

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Model-based beam control for illumination of remote objects - Part II: Laboratory testbed

Model-based beam control for illumination of remote objects ...

引用

Conference on Target-in-the-Loop - Atmospheric Tracking, Imaging and Compensation

作者： Basu, S Voelz, D Chandler, S Lukesh, G Sjogren, J New Mexico State Univ Las Cruces NM 88003 USA

ISBN: (纸本)0819454907

When a laser beam propagates through the atmosphere, it is subject to corrupting influences including mechanical vibrations, turbulence and tracker limitations. As a result, pointing errors can occur, causing loss of energy or signal at the target. Nukove Scientific Consulting has developed algorithms to estimate these pointing errors from the statistics of the return photons from the target. To prove the feasibility of this approach for real-time estimation, an analysis tool called RHINO was developed by Nukove. Associated with this effort, New Mexico State University developed a laboratory testbed, the ultimate objective being to test the estimation algorithms under controlled conditions and to stream data into RHINO to prove the feasibility of real-time operation. The present paper outlines the description of this testbed and the results obtained through RHINO when the testbed was used to test the estimation approach.

关键词： Sensors Mirrors Error analysis Signal detection Statistical analysis algorithm development Detection and tracking algorithms Reflectivity Target detection Model-based design

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Self-calibration algorithms for cameras and laser range finders

Self-calibration algorithms for cameras and laser range find...

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Conference on Intelligent Robots and Computer Vision XXII - algorithms, Techniques and Active Vision

作者： Zhang, QL Pless, R Washington Univ Dept Comp Sci & Engn St Louis MO 63130 USA

ISBN: (纸本)081945561X

Autonomous systems that navigate through unknown and unstructured environments must solve the egomotion estimation problem. Fusing the information from many different sensors makes this motion estimation more stable, but requires that the relative position and orientation of these sensors be known. Self-calibration algorithms are the most useful for this calibration problem because the do not require any known feature in the environment and can be used during system operation. Here we give geometric constraints, the coherent motion constraints, that allow a framework for the development of self-calibration algorithms for a heterogeneous sensor system (such as cameras, laser range finders, and odometry). If, for all sensors, a conditional probability density function can be defined to relate sensor measurements to the sensor motion, then the coherent motion constraints allows a maximum likelihood formulation of the sensor calibration problem. We present complete algorithms here for the case of a camera and laser range finder, in the case of both discrete and differential motions.

关键词： Sensors Cameras Calibration Motion estimation Laser range finders Motion measurement Imaging systems algorithm development Robots Sensor calibration

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Unsupervised automation of photographic composition rules in digital still cameras

Unsupervised automation of photographic composition rules in...

引用

Conference on Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications V

作者： Banerjee, S Evans, BL Univ Texas Embedded Signal Proc Lab Ctr Perceptual Syst Austin TX 78712 USA

ISBN: (纸本)0819452041

When taking pictures, professional photographers apply photographic composition rules, e.g. rule of thirds. The rule of thirds says to place the main subject's center at one of four places: at 1/3 or 2/3 of the picture width from left edge, and 1/3 or 2/3 of the picture height from the top edge. This paper develops low-complexity unsupervised methods for digital still cameras to (1) segment the main subject and (2) realize the rule-of-thirds. The main subject segmentation method uses the auto-focus filter, opens the shutter aperture fully, and segments the resulting image. These camera settings place the main subject in focus and blur the rest of the image by diffused light. The segmentation utilizes the difference in frequency content between the main subject and blurred background. The segmentation does not depend on prior knowledge of the indoor/outdoor setting or scene content. The rule-of-thirds method moves the centroid of the main subject to the closest of the four rule-of-thirds locations. We first define an objective function that measures how close the main subject placement obeys the rule-of-thirds, and then reposition the main subject in order to optimize the objective function. For multiple main subjects, the proposed algorithm could be extended to use rule-of-triangles by adding an appropriate constraint.

关键词： Photography Cameras Image segmentation Camera shutters Image filtering Signal processing algorithm development Edge detection Objectives Digital signal processing

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Computational algorithm for reconstructing the profile of 2-D rough surfaces

Computational algorithm for reconstructing the profile of 2-...

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Conference on Computational Imaging II

作者： El-Shenawee, M Miller, E Univ Arkansas Dept Elect Engn Fayetteville AR 72701 USA

ISBN: (纸本)0819452025

The presented reconstruction algorithm is based on merging the fast multipole method (FMM) for the forward solver with the rapidly convergent descent method for the cost function minimization algorithm (by Fletcher and Powell 1964 and 1970). Parametric results are presented showing the potential of the proposed computational algorithm.

关键词： Reconstruction algorithms Receivers algorithm development Dielectrics Detection and tracking algorithms Dielectric polarization Electromagnetic radiation General packet radio service Optimization (mathematics) Radar signal processing

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Quantum hidden subgroup algorithms: The devil is in the details

Quantum hidden subgroup algorithms: The devil is in the deta...

引用

Conference on Quantum Information and Computation II

作者： Lomonaco, SJ Kauffman, LH Univ Maryland Baltimore Cty Dept Elect Engn & Comp Sci Baltimore MD 21250 USA

We conjecture that one of the main obstacles to creating new non-abelian quantum hidden subgroup algorithms is the correct choice of a transversal.

ISBN: (纸本)0819453595

We conjecture that one of the main obstacles to creating new non-abelian quantum hidden subgroup algorithms is the correct choice of a transversal.

关键词： Quantum computing Fourier transforms algorithm development algorithms Analytical research Computer science Defense and security Matrices Electrical engineering Mathematics

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Performance evaluation of road detection and following systems

Performance evaluation of road detection and following syste...

引用

Conference on Mobile Robots XVII

作者： Hong, T Takeuchi, A Foedisch, M Shneier, M Natl Inst Stand & Technol Gaithersburg MD 20899 USA

ISBN: (纸本)0819455628

We describe a methodology for evaluating algorithms to provide quantitative information about how well road detection and road following algorithms perform. The approach relies on generating a set of standard data sets annotated with ground truth. We evaluate the algorithms used to detect roads by comparing the output of the algorithms with ground truth, which we obtain by having humans annotate the data sets used to test the algorithms. Ground truth annotations are acquired from more than one person to reduce systematic errors. Results are quantified by looking at false positive and false negative regions of the image sequences when compared with the ground truth. We describe the evaluation of a number of variants of a road detection system based on neural networks.

关键词： Roads Detection and tracking algorithms algorithm development Image segmentation Video Neural networks Visualization Databases Evolutionary algorithms Pattern recognition

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New directions in the development of the ORASIS algorithm

New directions in the development of the ORASIS algorithm

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Conference on Imaging Spectrometry IX

作者： Bowles, J Chen, W Gillis, D USN Res Lab Remote Sensing Div Washington DC 20375 USA

ISBN: (纸本)0819450324

The Optical Real-time Adaptive Spectral Identification System (ORASIS) continues to be developed by the Naval Research Laboratory. Recently, new methods to compress hyperspectral data using ORASIS in combination with wavelets have been demonstrated. Variations on this approach continue to be pursued and will be discussed. In addition, a new method to perform target identification based on Spectral Angle Mapper (SAM) has been demonstrated. When projected into a reduced dimension space, angles between spectra are not conserved. Proper determination of the dimensions and coordinates of the subspace can result in maximizing the angles between a spectrum of interest and the general background. This approach can be used for target identification where the "target" can be a rare spectrum or something found in the general background. Recent improvements to these methods, as well as new applications of the software, are discussed.

关键词： algorithm development Wavelets Detection and tracking algorithms Target detection Error analysis RGB color model Sensors Signal to noise ratio Target recognition Analytical research

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