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Generalized Multi-View Embedding for Visual Recognition and Cross-Modal Retrieval

IEEE TRANSACTIONS ON CYBERNETICS 2018年第9期48卷 2542-2555页

作者： Cao, Guanqun Iosifidis, Alexandros Chen, Ke Gabbouj, Moncef Laboratory of Signal Processing Tampere University of Technology Tampere Finland Department of Engineering Electrical and Computer Engineering Aarhus University Aarhus Denmark

In this paper, the problem of multi-view embedding from different visual cues and modalities is considered. We propose a unified solution for subspace learning methods using the Rayleigh quotient, which is extensible for multiple views, supervised learning, and nonlinear embeddings. Numerous methods including canonical correlation analysis, partial least square regression, and linear discriminant analysis are studied using specific intrinsic and penalty graphs within the same framework. Nonlinear extensions based on kernels and (deep) neural networks are derived, achieving better performance than the linear ones. Moreover, a novel multi-view modular discriminant analysis is proposed by taking the view difference into consideration. We demonstrate the effectiveness of the proposed multi-view embedding methods on visual object recognition and cross-modal image retrieval, and obtain superior results in both applications compared to related methods.

关键词： Cross-modal retrieval multi-view discriminant embedding multi-view subspace learning visual recognition

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A LAYER STRIPPING FAST ALGORITHM FOR THE TWO-DIMENSIONAL DIRECT-CURRENT INVERSE RESISTIVITY PROBLEM

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IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 1987年第5期25卷 558-563页

作者： YAGLE, AE Communications and Signal Processing Laboratory Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI USA

The inverse problem of reconstructing the resistivity of the earth, varying both laterally and with depth, from direct current measurements is considered. The problem is formulated as a multidimensional inverse scattering problem and solved using a layer stripping algorithm. This algorithm recursively reconstructs the resistivity and electrical potential on horizontal planes of increasing depth by downward continuation. This is the first exact solution to the inverse resistivity problem for resistivity varying laterally as well as with depth. The algorithm is an extension of an algorithm proposed by Levy for resistivity varying in one dimension.

关键词： Conductivity Inverse problems Signal processing algorithms Earth Electric potential Multidimensional systems Integral equations Current measurement Surface reconstruction Partial differential equations

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A new method for determining the secondary electron yield dependence on ion energy for plasma exposed surfaces

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IEEE TRANSACTIONS ON PLASMA SCIENCE 1996年第3期24卷 1184-1187页

作者： En, W Cheung, NW Assisted Materials Processing Laboratory Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA

A new experimental method for determining the secondary electron yield for plasma exposed surfaces is described. From the measurement of the plasma condition and the total current generated when a voltage pulse is applied to a target material exposed to a plasma, the dependence of the secondary electron yield of that target on ion energy can be extracted. The secondary electron yield Is determined by an analytical model of the plasma ion, electron, and displacement currents. Experimental results for an aluminum target correlate well with previous secondary electron measurements which used a traditional technique, Secondary electrons yield data of other materials: single crystal silicon, aluminum, titanium nitride, and silicon dioxide are also extracted.

关键词： Electrons Plasma measurements Plasma materials processing Pulse measurements Data mining Aluminum Current measurement Energy measurement Pulse generation Voltage

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parallel creation of non-redundant gene indices from partial mRNA transcripts

Parallel creation of non-redundant gene indices from partial...

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6th International Conference on parallel (PaCT 2001)

作者： Trivedi, Nishank Bischof, Jared Davis, Steve Pedretti, Kevin Scheetz, Todd E. Braun, Terry A. Roberts, Chad A. Robinson, Natalie L. Sheffield, Val C. Soares, M.Bento Casavant, Thomas L. Parallel Processing Laboratory Department of Electrical and Computer Engineering University of Iowa Iowa City IA 52242 United States

This paper describes the UIcluster software tool, which partitions expressed sequence tag (EST) sequences and other genetic sequences into "clusters" based on sequence similarity. Ideally, each cluster will contain sequences that all represent the same gene. UIcluster has been developed over the course of 4 years to solve this problem efficiently and accurately for large data sets consisting of tens or hundreds of thousands of EST sequences. The latest version of the application has been parallelized using the MPI standard. Both the computation and memory requirements of the program can be distributed among multiple (possibly distributed) UNIX processes. © 2002 Elsevier Science B.V. All rights reserved.

关键词： parallel processing systems

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1.5V resistive fuse for image smoothing and segmentation

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ELECTRONICS LETTERS 1997年第10期33卷 851-852页

作者： Athreya, JKV Gregson, PH Department of Electrical Engineering Computer Vision and Image Processing Laboratory Technical University of Nova Scotia Halifax Canada

A 1.5V resistive fuse for image smoothing and segmentation using bulk-driven MOSFETs is presented. The circuit switches on only if the differential voltage applied across its input terminals is less than a set voltage;it switches off if the differential voltage is higher than the set value. The useful operation range of the circuit is 0.4V with a supply voltage of 1.5V and threshold voltages of V-Tn = 0.828V and V-Tp = -0.56V for n and g channel MOSFETs, respectively.

关键词： image processing segmentation (image processing)

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A LAYER-STRIPPING FAST ALGORITHM FOR RECONSTRUCTING AN ELASTIC MEDIUM FROM ITS COMPRESSIONAL WAVE REFLECTION RESPONSE

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IEEE JOURNAL OF OCEANIC engineering 1987年第2期12卷 423-432页

作者： YAGLE, AE Department of Electrical Engineering and Computer Science Communications and Signal Processing Laboratory Ann Arbor MI USA

A fast algorithm for recovering profiles of density and compressional (P) and shear-vertical (SV) wave speeds as functions of depth for the inverse seismic problem in a continuous layered elastic medium is obtained. This algorithm differs from previous fast algorithms for this problem since it requires only the compressional wave P-P reflection response at the surface of the medium, for three different slownesses or angles of incidence. Previous algorithms have required shear stress data in the form of the P-SV and SV-SV reflection responses, making them unsuitable for an ocean environment. This algorithm is thus much more suitable for reconstructing the ocean floor from pressure data taken in the ocean. The algorithm is exact, and it includes the effects of multiple reflections and mode conversions. A computer run illustrates the performance of the algorithm on synthetic data.

关键词： Oceans Inverse problems Signal processing algorithms Integral equations Acoustic reflection Acoustic propagation Surface waves Sea surface Probes Response surface methodology

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Using run-time uncertainty to robustly schedule parallel computation 4th

Using run-time uncertainty to robustly schedule parallel com...

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4th International Conference on parallel Computing Technologies, PaCT 1997

作者： Dietz, R.D. Casavant, T.L. Scheetz, T.E. Braun, T.A. Andersland, M.S. Parallel Processing Laboratory Electrical and Computer Engineering Department The University of Iowa Iowa CityIA52242 United States

ISBN: (纸本)3540633715

Increasingly, feedback of measured run-time information is being used in the optimization of computation execution. Because of this, the need for a model relating the static view of a computation to its runtime variance is becoming more important. Recently, we have described such a model which uses the notion of uncertainty to provide bounds on key scheduling parameters of the run-time computation. In this paper, we demonstrate how our model provides a foundation for robust parallel scheduling, i.e., scheduling that optimizes for computation execution in the presence of run-time variance. While this work was inspired by our previous study of uncertainty due to measurement intrusion, the scheduling paradigm presented here represents a broader, more general application of the uncertainty concept. © Springer-Verlag Berlin Heidelberg 1997.

关键词： Scheduling

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ADVANCES IN MATHEMATICAL-MODELS FOR IMAGE-processing

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PROCEEDINGS OF THE IEEE 1981年第5期69卷 502-528页

作者： JAIN, AK Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis CA USA

Several state-of-the-art mathematical models useful in image processing are considered. These models include the traditional fast unitary transforms, autoregessive and state variable models as well as two-dimensional linear prediction models. These models introduced earlier [51], [52] as low-order finite difference approximations of partial differential equations are generalized and extended to higher order in the framework of linear prediction theory. Applications in several image processing problems, including image restoration, smoothing, enhancement, data compression, spectral estimation, and filter design, are discussed and examples given.

关键词： Mathematical model Image processing Predictive models Transforms Finite difference methods Partial differential equations Prediction theory Image restoration Smoothing methods Data compression

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THE ROLE OF SPECTRAL CORRELATION IN DESIGN AND PERFORMANCE ANALYSIS OF SYNCHRONIZERS

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IEEE TRANSACTIONS ON COMMUNICATIONS 1986年第11期34卷 1089-1095页

作者： GARDNER, WA Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis CA USA

The popular class of synchronizers that consist of a quadratic nonlinearity followed by a phase-lock loop is investigated, and it is shown that the optimum design of the quadratic transformation is characterized in terms of a spectral correlation function for the signal to be synchronized to. It is also shown that the SNR performance of this quadratic transformation, and the mean-square phase jitter of the phaselock loop are both characterized in terms of spectral correlation functions. The conditions under which the optimum quadratic transformations, for symbol synchronization of BPSK, QPSK, SQPSK, and MSK, and for carrier synchronization of BPSK, reduce to the well-known matched-filter-squarer are identified. In addition, the well-known zeromean-square-phase-jitter condition is generalized from PAM to all synchronizable signals, and is characterized in terms of the spectral correlation function. The low-SNR maximum-likelihood synchronizer for all quadratically synchronizable signals is characterized in terms of a multiplicity of maximum-SNR quadratic spectral-line generators. A closed form implementation in terms of a matched filter, squarer, and symbol-rate-synchronized averager is obtained for BPSK and QPSK signals.

关键词： Performance analysis Frequency synchronization Binary phase shift keying Quadrature phase shift keying Timing Jitter Signal generators Matched filters Oscillators Clocks

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A UNIFYING VIEW OF 2ND-ORDER MEASURES OF QUALITY FOR SIGNAL CLASSIFICATION

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IEEE TRANSACTIONS ON COMMUNICATIONS 1980年第6期28卷 807-816页

作者： GARDNER, WA Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis CA USA

The major purpose of this paper is to promote interchange between the fields of pattern recognition and communications, in the realm of statistical classification. The general class of second-order measures of quality for statistical classification is defined. The variety of members in this class that have been used by practitioners or proposed by theorists for numerical pattern-classification and signal waveform-classification are compared and contrasted. The several measures that are the most generally applicable are shown to be either equivalent to each other or characterizable in terms of each other, thereby revealing an inherent unity. For example, the ratio of between-class-scatter to within-class-scatter used in pattern recognition and the ratio of signal-energy to noise-energy used in communications are unified through an identification of signal with between-class-scatter and noise with within-class-scatter. Results on equivalences are stated and proved for waveform classification rather than numerical classification in order to complement the extensive literature on the latter, and to emphasize applicability to communications. This entails introduction of a scatter ratio for waveforms. In a companion paper, second-order measures of quality are used as a basis for a general nearestprototype signal-classification methodology; canonical signal features for this methodology are identified, and a general approach for determining appropriate class prototypes is given. These two papers provide an integrated approach to the design of a complete signal classifier, i.e., feature extraction and discriminant-functional design tailored to fit a minimumdistance discrimination rule.

关键词： Pattern classification Signal design Signal processing Pattern recognition Signal to noise ratio Scattering Prototypes Feature extraction Probability Communications Society

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