1 Estimation of Message Source and Destination from Network Intercepts (2009)
We consider the problem of estimating the endpoints (source and destination) of a transmission in a network based on partial measurement of the transmission path. Possibly asynchronous sensors placed...
Chrétien, Stéphane, Hero, Alfred, Perdry, Hervé
The EM algorithm is a widely used methodology for penalized likelihood estimation. Provable monotonicity and convergence are the hallmarks of the EM algorithm and these properties are well...
A binary linear programming formulation of the graph edit distance for unweighted, undirected graphs with vertex attributes is derived and applied to a graph recognition problem. A general...
NEW DEVELOPMENTS Seeing the Unseen: Microarray-Based Gene Expression Profiling in Vision (2008)
Sepideh Zareparsi, Alfred Hero, Donald J. Zack, Robert W. Williams, Anand Swaroop
Completion of genome sequencing efforts of humans and model organisms 1–3 have provided exciting opportunities for vision research. Questions that were hard to envisage, let alone resolve, suddenly...
Partial Update LMS Algorithms (2008)
Abstract — Partial updating of LMS filter coefficients is an effective method for reducing computational load and power consumption in adaptive filter implementations. This paper presents an...
TESTS FOR GLOBAL MAXIMUM OF THE LIKELIHOOD FUNCTION (2008)
Given a relative maximum of the log-likelihood function, how to assess whether it is the global maximum? This paper investigates a statistical tool, which answers this question by posing it as a...
1 A Binary Linear Programming Formulation of the Graph Edit Distance (2008)
A binary linear programming formulation of the graph edit distance for unweighted, undirected graphs with vertex attributes is derived and applied to a graph recognition problem. A general...
Image Reconstruction for a Novel Compton Scatter Tomograph (2007)
Alfred Hero, Anne Sauve, Tom Kragh
Single photon emission computed tomography (SPECT) is a widespread medical imaging technology which provides images of metabolic tracer distributions within the body by detecting gamma-ray emissions...
Tree Based Modeling, Prediction And Analysis Of Chaotic Time Series (2007)
Olivier Michel, Alfred Hero, Anne-emmanuelle Badel, Patrick Flandrin
this paper, the quantized prediction that may be derived from the tree is emphasized. Furthermore, it is shown how the prediction error of a 1-step forward tree based predictor gives rise to some...
Parameter Estimation for Multi-dimensional Filtered Poisson Processes (2007)
heroeecs.umich.edu As comprehensively illustrated in the classic text on point processes by Donald Snyder [26] and its revision [27] co-authored with Michael Miller, multi-dimensional Poisson...
Large scale inference and tomography for network monitoring and diagnosis. (2007)
Mark Coates, Alfred Hero, Robert Nowak, Bin Yu
Today's Internet is a massive, distributed network which continues to explode in size as ecommerce and related activities grow. The heterogeneous and largely unregulated structure of the...
Noisy Word Recognition Using Denoising and Moment Matrix (2007)
We consider the problem of recognition of a printed word belonging to a limited dictionary. The main difficulty comes from the fact that this word can be printed using different fonts, sizes, and...
Alfred Hero, Anne Emmanuelle Badel, Olivier Michel, Olivier Michel
In this paper we develop a regression tree approach to identification and prediction of signals which evolve according to an unknown non-linear state space model. In this approach a tree is...
Estimation of R enyi Information Divergence via Pruned Minimal Spanning Trees 1 (2007)
In this paper we develop robust estimators of the R enyi information divergence (I-divergence) given a reference distribution and a random sample from an unknown distribution. Estimation is performed...
Signal Detection and Classification (2007)
Detection and classification arise in signal processing problems whenever a decision is to be made among a finite number of hypotheses concerning an observed waveform. Signal detection algorithms...
Asymptotic Characterization of Log-Likelihood (2007)
Maximization Based Algorithms, Doron Blatt, Alfred Hero
The asymptotic distribution of estimates that are based on a sub-optimal search for the maximum of the log-likelihood function is considered. In particular, estimation schemes that are based on a...
Single-Spin Magnetic Resonance Force Microscopy (2006)
Rugar, Daniel, Sidles, John, Hero, Alfred
IBM and its subcontractors achieved the major goal of this contract: the detection of individual electron spins by magnetic resonance force microscopy (MRFM). To achieve this result a number of key...
Image registration methods in high-dimensional space (2006)
Neemuchwala, Huzefa, Hero, Alfred, Zabuawala, Sakina, Carson, Paul
Quantitative evaluation of similarity between feature densities of images is an important step in several computer vision and data-mining applications such as registration of two or more images and...
A binary linear programming formulation of the graph edit distance (2006)
Abstract—A binary linear programming formulation of the graph edit distance for unweighted, undirected graphs with vertex attributes is derived and applied to a graph recognition problem. A general...
Adaptive multi-modality sensor scheduling for detection and tracking of smart targets (2005)
Chris Kreucher, Doron Blatt, Alfred Hero
Abstract — This paper considers the problem of sensor scheduling for the purposes of detection and tracking of “smart ” targets. Smart targets are targets that are able to detect when they are...
Masayuki Akimoto, Hong Cheng, Dongxiao Zhu, Joseph A. Brzezinski, Ritu Khanna, ...
doi:10.1073/pnas.0508214103 This information is current as of June 2007. High-resolution figures, a citation map, links to PubMed and Google Scholar, etc., can be found at:...
Estimation of message source and destination from link intercepts (2005)
We consider the problem of estimating the endpoints (source and destination) of a transmission in a network based on partial measurement of the transmission path. Sensors placed at various points...
A convergent incremental gradient method with constant step size,” under revision for (2004)
Doron Blatt, Alfred Hero, Hillel Gauchman
Abstract. An incremental gradient method for minimizing a sum of continuously differentiable functions is presented. The method requires a single gradient evaluation per iteration and uses a constant...
Distributed maximum likelihood estimation for sensor networks (2004)
The problem of finding the maximum likelihood estimator of a commonly observed model, based on data collected by a sensor network under power and bandwidth constraints is considered. In particular, a...
Local feature matching using entropic graphs (2004)
Huzefa Neemuchwala, Alfred Hero, Paul Carson, Charles Meyer
We present a general framework for image discrimination based on identifying small, localized differences between images. Our novel matching scheme is based on an alternate information divergence...
Manifold Learning with Geodesic Minimal Spanning Trees (2003)
In the manifold learning problem one seeks to discover a smooth low dimensional surface, i.e., a manifold embedded in a higher dimensional linear vector space, based on a set of measured sample...
Unicast-Based Inference of Network Link Delay Distributions Using Mixed Finite Mixture Models (2003)
As telecommunication networks grow larger and more complex, it is important to monitor internal link characteristics for operation, monitoring, and diagnosis purposes. Since router link monitoring is...
A New Generalized Cross-Correlator. (2002)
Hero,Alfred, Schwartz,Stuart C.
A new Generalized Cross-Correlator (GCC) for the passive time delay estimation problem is presented. The interpretation of this GCC is that of estimating the cross-correlation function by...
Mark Coates, Alfred Hero, Robert Nowak, Bin Yu
Today's Internet is a massive, distributed network which continues to explode in size as ecommerce and related activities grow. The heterogeneous and largely unregulated structure of the...
Image Registration Using Entropic Graph-Matching Criteria (2002)
Huzefa Neemuchwala Alfred, Alfred Hero, Paul Carson
Image registration requires the specification of a class of discriminatory image features and an appropriate imagedissimilarity measure. Entropic spanning graphs produce a consistent estimator of...
Entropie conditionnelle de Rényi et segmentation (2001)
MICHEL, Olivier, FLANDRIN, Patrick, HERO, Alfred
Après avoir rappelé la démarche axiomatique proposée par A. Rényi pour la définition de l'entropie, nous montrons que cette dernière s'étend facilement aux notions d'entropie conditionnelle...
Unicast inference of network link delay distributions from edge measurements (2001)
Inference of network internal link characteristics has become an increasingly important issue for operating and evaluating large telecommunication networks. Since it is usually impractical to...
Large scale inference and tomography for network monitoring and diagnosis. (2001)
Mark Coates, Alfred Hero, Robert Nowak, Bin Yu
Today's Internet is a massive, distributed network which continues to explode in size as ecommerce and related activities grow. The heterogeneous and largely unregulated structure of the...
Image Registration With Minimum Spanning Tree Algorithm (2000)
Bing Ma, Alfred Hero, John Gorman, And Olivier Michel, Olivier Michel
Registration is a fundamental task in image processing and quite a few registration techniques have been developed in various fields. In this paper we propose a novel graphrepresentation method for...
Image Registration with Minimum Spanning Tree Algorithm (2000)
Registration is a fundamental task in image processing and quite a few registration techniques have been developed in various fields. In this paper we propose a novel graphrepresentation method for...
MST et divergences informationelles: applications (2000)
Olivier Michel, Alfred Hero, Patrick Fl, Catégorie Recherche
- Time frequency analysis.
Olivier Michel, Alfred Hero, Anne Emmanuelle Badel, Olivier Michel
In this paper we develop a regression tree approach toidenti cation and prediction of signals which evolve according to an unknown non-linear state space model. In this approach a tree is recursively...
Estimation of Rényi information divergence via pruned minimal spanning trees (1999)
In this paper we develop robust estimators of the Rényi information divergence (I-divergence) given a reference distribution and a random sample from an unknown distribution. Estimation is performed...
Detection and resource Allocation Problems in ATR Systems (1998)
Hero, Alfred, Teneketzis, Demosthenis
This is the final report on research activity on the AFOSR AASERT grant P49620-98-0370 during the period beginning to end. The AASERT grant has permitted Professors Hero and Teneketzis to provide...
Multiple Model Particle Filtering For Multi-Target Tracking (1998)
Hero, Alfred, Kreucher, Chris, Kastella, Keith
This paper addresses the problem of tracking multiple moving targets by recursively estimating the joint multitarget probability density (JMPD). Estimation of the JMPD is done in a Bayesian framework...
Comparaison de systèmes modélisés par des arbres de régression (1997)
BADEL, Anne-Emmanuelle, MICHEL, Olivier, HERO, Alfred
Nous présentons une méthode permettant de comparer des systèmes dynamiques à faible nombre de degrés de liberté. À partir d'arbres de régression associés à une partition récursive de...
Tree Structured Non-Linear Signal Modeling And Prediction (1997)
Alfred Hero, Anne Emmanuelle Badel, Olivier Michel, Olivier Michel
We develop a low complexity non-parametric method of nonlinear prediction based on adaptive partitioning of the phase space associated with an observed process. The partitioning method is implemented...
Arbres de régression pour l'analyse de séries chaotiques (1995)
BADEL, Anne-Emmanuelle, MICHEL, Olivier, HERO, Alfred
L'analyse non paramétrique des données (ou des séries) issues de modèles statistiques non additifs a été introduite par Sonquist et Morgan ([1]) puis reprise par Breiman, Friedman, Olshen et...
Tree Structured Non-Linear Signal Modeling And Prediction (1995)
Olivier Michel, Alfred Hero, Ecole Normale
We develop a non-parametric method of nonlinear prediction based on adaptive partitioning of the phase space associated with the process. The partitioning method is implemented with a recursive...
Jeffrey A. Fessler, Alfred Hero
Abstruct- Most expectation-maximization (EM) type algo-rithms for penalized maximum-likelihood image reconstruction converge slowly, particularly when one incorporates additive background effects...
Theoretical limits for optical position estimation using imaging arrays (1991)
On présente des résultats qui spécifient les limites fondementales sur la précision des estimées de la position d'une source optique quasimonochromatique vue par un téléscope avec détecteur...
Akimoto, Masayuki, Cheng, Hong, Zhu, Dongxiao, Brzezinski, Joseph A., Khanna, Ritu, Filippova, Elena, ...
The Maf-family transcription factor Nrl is a key regulator of photoreceptor differentiation in mammals. Ablation of the Nrl gene in mice leads to functional cones at the expense of rods. We show that...
Akimoto, Masayuki, Cheng, Hong, Zhu, Dongxiao, Brzezinski, Joseph A., Khanna, Ritu, Filippova, Elena, ...
The Maf-family transcription factor Nrl is a key regulator of photoreceptor differentiation in mammals. Ablation of the Nrl gene in mice leads to functional cones at the expense of rods. We show that...