Alfred Hero - Interests in Statistical Inference and Learning

My interests in statistical inference and learning fall into four different areas: development of estimator/detector independent lower bounds on mean-square-error and other performance criteria; analyzing tradeoffs between different error measures, e.g. tradeoffs between bias and variance and tradeoffs between miss-classification and miss-detection probability; implementation and convergence analysis of iterative maximimum likelihood algorithms such as the EM algorithm, CFAR detection, and graph theoretic approaches to non-parametric estimation and learning. Some of my recent publications in these areas are given below.
Archival Articles

  • H. Park, P. H. Bland, A. O. Hero, and C. R. Meyer, "Target selection method in atlas construction using multidimensional scaling", (.pdf) , submitted to IEEE Trans. on Medical Imaging, Oct. 2005.

  • D. Justice and A. O. Hero, "Estimation of message source and destination from link intercepts", (.pdf) , submitted to IEEE Trans. on Information Forensics and Security, April 2005.

  • M.-F. Shih and A. O. Hero, "Hierarchical inference of unicast network topologies based on end-to-end measurements", submitted to IEEE Journ on Signal Processing, May 2005. (.pdf)

  • D. Blatt and A. O. Hero, "Energy based sensor network source localization via projection onto convex sets (POCS)", submitted to IEEE Trans. on Signal processing, Feb. 2005. (.pdf) . In revision.

  • D. Blatt and A. O. Hero, "On tests for global maximum of the log-likelihood function," , IEEE Trans. on Info Theory , (.pdf) . Submitted Jan. 2005.

  • D. Justice and A.O. Hero "A linear reformulation of the graph edit distance for graph recognition," (.pdf) , IEEE Trans. on Pattern Analysis and Machine Intelligence (PAMI), submitted Jan. 2005.

  • S. Ahn, J.A. Fessler, D. Blatt, and A. Hero, "Convergent incremental optimization transfer algorithms: application to tomography", (.pdf) , (revision) submitted to IEEE Trans. on Medical Imaging, Oct. 2004.

  • D. Blatt, A. O. Hero and H. Gauchman, "A convergent incremental gradient algorithm with a constant stepsize", (.pdf) , submitted to SIAM Journal on Optimization, Sept. 2004. In revision.

  • M. Ting, A. O. Hero, D. Rugar, C.-Y. Yip and J. Fessler, "Near optimal signal detection for finite state Markov signals with application to magnetic resonance force microscopy," IEEE Trans. on Sifnal Processing, (.pdf), To appear 2005.

  • J. Costa, N. Patwari and A. O. Hero, "Distributed multidimensional scaling with adaptive weighting for node localization in sensor networks", (.pdf) , ACM Journal on Networking. To appear 2005.

  • D. Zhu, A.O. Hero, H. Cheng, R. Khanna and A. Swaroop, "Network constrained clustering for gene microarray data," (.html) , Bioinformatics, Sept. 2005. .
  • D. Zhu, A.O. Hero, Z.S. Qin, A. Swaroop, "High throughput screening of co-expressed gene pairs with controlled False Discovery Rate (FDR) and Minimum Acceptable Strength (MAS)," (.pdf) , Journal of Computational Biology, Vol. 12, No. 7, 1027-1043, Sept. 2005. Supplemental tables: (.pdf) .

  • N. Patwari, A. O. Hero, J. Ash, R. L. Moses, S. Kyperountas, N. S. Correal, "Locating the nodes: cooperative localization in wireless sensor networks", (.pdf) IEEE Signal Processing Magazine ,vol. 22, no. 4, pp 54-69, July 2005. Link to data presented in this article on Wireless Sensor Network Localization Measurement Repository (.html)

  • "Min-Capacity of a Multiple-Antenna Wireless Channel in a Static Rician Fading Environment," M. Godavarti, A. O. Hero, and T. Marzetta, IEEE Trans. on Wireless Communications . (.pdf) , vol. 4, no. 4, pp. 1715-1723, July 2005.

  • H. Neemuchwala, A. O. Hero, and P.L. Carson, "Image matching using alpha-entropy measures and entropic graphs," (.pdf) , Signal Processing (Special Issue on Content-based Visual Information Retrieval), vol 85, pp. 277-296, 2005.

  • P.-J. Chung, J. B\"{o}hme, and A. O. Hero
    "Tracking of multiple moving sources using recursive EM algorithm," .pdf , EURASIP Journ. of Applied Signal Processing (JASP), Vol. 1, pp. 50-60, 2005.

  • C. Vignat, A. O. Hero and J. Costa, "About closedness by convolution of the Tsallis maximizers," (.pdf), Physica A, Vol. 340, Issue 1-3, pp. 147-152, Sept. 2004.

  • M. Godavarti and A. O. Hero, "Partial update LMS algorithms," (.pdf) , IEEE Trans. on SP, Vol. 53, No. 7, pp. 2382- 2399, 2005 (.pdf) IEEE Explore version . This is a condensation of material in the original two papers (containing many more details) submitted to the IEEE SP Trans. in Oct. 2001: Paper 1 (.pdf) , Paper 2 (.pdf) ,

  • M. Godavarti and A. O. Hero, "Convergence of differential entropies," , IEEE Trans. on Info Theory , Vol 50, No. 1, pp. 171-176, Jan. 2004. (.pdf) . IEEE Explore reprint (.pdf)

  • M. Ting, A. O. Hero, D. Rugar, C.-Y. Yip, and J. Fessler, "Electron spin detection in the frequency domain under the interrupted Oscillating Cantilever-driven Adiabatic Reversal (iOSCAR) protocol," arXiv mansucript quant-ph/0307042, (arXiv), Dec. 2003.

  • J. Costa and A. O. Hero, "Geodesic entropic graphs for dimension and entropy estimation in manifold learning," (.pdf) , IEEE Trans. on Signal Process., Vol. 52, No. 8, pp. 2210-2221, Aug. 2004. . IEEE Explore (.pdf)

  • A. O. Hero, J. Costa and B. Ma, "Convergence rates of minimal graphs with random vertices," (.pdf) , submitted to IEEE Trans. on Inform. Theory. If you previously downloaded or otherwise obtained the original version of this paper, submitted to IT in Aug 2001, it contained errors that have been corrected in this revision. A more complete version of this paper was published as Technical Report entitled, "Asymptotic relations between minimal graphs and alpha-entropy," (.pdf), Technical Report CSPL-334 Communications and Signal Processing Laboratory, The University of Michigan, 48109-2122, Mar. 2003.

  • A. O. Hero, B. Ma, O. Michel and J. Gorman, "Applications of entropic spanning graphs," (.pdf) , in IEEE Signal Proc. Magazine (Special Issue on Mathematics in Imaging), Vol 19, No. 5, pp 85-95, Sept. 2002. IEEE Explore reprint (.pdf) .

  • O. Michel, A. Hero, P. Flandrin, 2000 : "Graphes de Représentations Minimaux, Entropies et Divergences : Applications," Traitement du Signal, Vol. 17, No. 4, pp. 287-297. (.pdf)

  • S. Chretien and A. O. Hero, "Kullback Proximal Algorithms for Maximum Likelihood Estimation," (.pdf) , IEEE Trans. on Inform. Theory, Vol IT-46, No. 5, pp. 1800-1810, Aug. 2000. IEEE Explore reprint (.pdf) .

  • A. O. Hero, "Sur un probleme d'estimation pour des processus de Poisson composes et filtres," (In French - English title, ``On a problem of estimation for filtered composed Poisson processes") (.ps.Z) , (.ps) , or (.pdf) Traitement du Signal, Vol. 15, No. 6, pp. 493-502, May 1999.

  • "Tree structured non-linear signal modeling and prediction," (.pdf) , O. Michel, A. O . Hero and A.-E. Badel, IEEE Trans. on Signal Processing, Vol. SP-47, No. 11, pp. 3027-3041, Nov. 1999. IEEE Explore reprint (.pdf) .

  • A. O. Hero and O. Michel, "Asymptotic theory of greedy approximations to minimal $K$-point random graphs," (.ps.Z) , (.ps) , or (.pdf) , IEEE Trans. on Info Theory , Vol. IT-45, pp. 1921-1939, Sept. 1999. IEEE Explore reprint (.pdf) . The Bounded Variation condition on the set of densities is non-standard and is overly strong. Analogous bounds to those in this paper hold under the much weaker assumption that the density lies in a Holder space.

  • A O Hero, R Piramuthu, S R Titus, J A Fessler, Minimax emission computed tomography using high resolution anatomical side information and B-spline models. IEEE Tr. Info. Theory, 45(3):920-38, Apr. 1999. IEEE Explore reprint (.pdf) .

  • Hero, A.; Messer, H.; Goldberg, J.; Thomson, D.J.; Amin, M.G.; Giannakis, G.; Swami, A.; Tugnait, J.K.; Nehorai, A.; Swindlehurst, A.L.; Cardoso, J.-F.; Lang Tong; Krolik, J., "Highlights of statistical signal and array processing," Signal Processing Magazine, IEEE , Volume: 15 Issue: 5, pp. 21-64, Sept. 1998. IEEE Explore reprint (.pdf) .

  • A O Hero, M Usman, A C Sauve, J A Fessler, Recursive algorithms for computing the Cramer-Rao bound. IEEE Tr. Sig. Proc., 45(3):803-7, Mar. 1997. (IEEE Explore version)

  • A. O. Hero, J. A. Fessler and M. Usman, "Exploring estimator bias-variance tradeoffs using the uniform CR bound" (Sec. II.C typos corrected) (.pdf) , IEEE Transactions on Signal Processing, Vol. 44, No. 8, pp. 2026-2042, Aug. 1996. (received 1998 Best Paper Award, IEEE Signal Processing Society). (IEEE Explore version).
    Errata (Explore version): p. 2026 first paragraph of Introduction should read "...variance \sigma^2_\theta= E_\theta[(\hat{t} - E_\theta[\hat{t}])^2];" p. 2030 top of second column, item labeled 4): should read "Compute the point (\delta, B(\theta, \delta)) via B(\theta, \delta) = \lambda^2 * ybar' * Fy * ybar;" on p. 2031 Eq (24), the term "+\nabla b_\theta \nabla^T b_\theta" should be "+\nabla m_\theta \nabla^T m_\theta." Thanks to Z. Chen at U. Alberta for pointing out this last typo.

  • J A Fessler, A O Hero, Penalized maximum-likelihood image reconstruction using space-alternating generalized EM algorithms. IEEE Tr. Im. Proc., 4(10):1417-29, Oct. 1995. (IEEE Explore version)
    Errata: The powers of 2 in the triangle inequalities on p.\ 1427 should not be there. Condition 2 should also include the requirement that \nabla^{10}\phi be continuous in \emph{both} arguments, i.e. in R_S \times R^p There should not be any 1/2 in the definition of J on p.\ 1426. The plus before the final quadratic form in (38) should be a minus.

  • A O Hero, J A Fessler, A recursive algorithm for computing Cramer-Rao-type bounds on estimator covariance. (IEEE Explore) IEEE Tr. Info. Theory, 40(4):1205-10, Jul. 1994.

  • J A Fessler, A O Hero, Space-alternating generalized expectation-maximization algorithm. IEEE Tr. Sig. Proc., 42(10):2664-77, Oct. 1994. (IEEE Explore version)
    Errata: The equation immediately below eqn. (18) is unnecessary. As written it suggests we foolishly replace some of the pixel estimates with "old" values, when of course we do not. The newer version that appears in our 1995 T-IP paper is correct, and supersedes the T-SP version. The proof of Theorem 2 incorrectly states that the eigenvalues of the Gauss-Siedel matrix are real. They can be complex, so the proof only applies to cases where the maximum magnitude eigenvalue is real.

  • B. Baygun and A.O. Hero "Optimal simultaneous detection and estimation under a false alarm constraint," IEEE Trans. on Information Theory, Vol. 41, No. 3, pp. 688-703, May 1995. IEEE Explore reprint (.pdf) .

  • A.O. Hero and J.A. Fessler, "Convergence in norm for EM-type algorithms," , (.ps.Z) , (.ps) , (.pdf) , Statistica Sinica , Vol 5, No. 1, pp. 41-54, Jan. 1995.

  • A O Hero and J A Fessler.
    A recursive algorithm for computing Cramer-Rao type bounds on estimator covariance. IEEE Trans. Information Theory, Vol IT-40, No. 4, pp. 1205-1210, July 1994.

  • J.D. Gorman and A.O. Hero
    "Lower bounds for parametric estimation with constraints," IEEE Trans. on Information Theory , Vol. IT-36, pp. 1285-1301, Nov. 1990. IEEE Explore reprint .pdf .

  • A.O. Hero
    "Lower bounds on estimator performance for energy invariant parameters of multi-dimensional Poisson processes," IEEE Trans. on Information Theory , Vol. IT-35, pp. 843-858, July 1989. IEEE Explore reprint .pdf .

  • A.O. Hero and S.C. Schwartz
    "Level crossing representations, Poisson asymptotics and applications to passive arrays," Stochastic Processes in Underwater Acoustics, C. Baker, Ed., pp. 95-121, Springer-Verlag, New York, 1986.

    Book Chapters

  • J. Costa and A. O. Hero, "Learning intrinsic dimension and entropy of shapes," in Statistics and analysis of shapes, Eds. H. Krim and T. Yezzi, Birkhauser, to appear. (.pdf)

  • "Detection and Classification," A. O. Hero , CRC Handbook on Signal Processing, 1997.

    Technical Reports

  • C.-Y. Yip, A. O. Hero, and D. Rugar, "Detection of Bistatic Electron Spin Signals in Magnetic Resonance Force Microscopy (MRFM)," arXiv mansucript quant-ph/0307042, (arXiv), June 2003.

  • C. Hory and A. O. Hero, "Sequential Probability Ratio Test for the detection of a single electron spin in the OSCAR setup," arXiv mansucript quant-ph/0402181, (arXiv), Feb. 2004.

  • J. Costa and A. O. Hero, "Manifold learning with geodesic minimal spanning trees," arXiv manuscript cs.CV/0307038 (arXiv) July 2003.

  • A. O. Hero, J. Costa and B. Ma, "Asymptotic relations between minimal graphs and alpha-entropy," (.pdf), Technical Report CSPL-334 Communications and Signal Processing Laboratory, The University of Michigan, 48109-2122, Mar. 2003.

  • A. O. Hero and B. Ma and O. Michel and J. D. Gorman, "Alpha-Divergence for Classification, Indexing and Retrieval (Revised)," (.pdf), Technical Report CSPL-328 Communications and Signal Processing Laboratory, The University of Michigan, 48109-2122, June 2002. The previous versions " (.pdf), (June 2002) and (.pdf), (May 2001) stated convergence rates for minimal graphs that were not correct.

  • H. S. Kim and A. O. Hero, "Comparison of GLR and invariance methods sapplied to adaptive target detection in structured clutter," (.ps.gz) , CSPL-323 Communications and Signal Processing Laboratory, The University of Michigan, 48109-2122, Nov. 2000. A subset of this work appears in IEEE Trans on IP.

  • S. Chretien and A. O. Hero "Generalized Proximal Point Algorithms and Bundle Implementations," , (.ps.Z) , (.ps.Z) , (.pdf) , CSPL Technical Report CSPL-313, Aug. 1998.

  • A. O. Hero, M. Usman, Anne Sauve, and J. A. Fessler "Recursive algorithms for computing the Cramer-Rao bound," (.ps) CSPL Technical Report, Nov. 1996. A subset of this work appeared in IEEE Trans. SP, March 1997.

    Conference Proceedings

  • R. Raghuram, R. Raich and A.O. Hero, "Single-stage waveform selection for adaptive resource constrained state estimation," 2006 IEEE Intl. Conf. on Acoustics, Speech, and Signal Processing, Toulouse France, submitted Oct. 2005. (.pdf)

  • A. Rao, A.O. Hero, D.J. States and J.D. Engel, "Inference of biologically relevant gene influence networks using the directed information criterion," 2006 IEEE Intl. Conf. on Acoustics, Speech, and Signal Processing, Toulouse France, submitted Oct. 2005. (.pdf)

  • R. Raich and A.O. Hero, "On dimensionality reduction for classification and its application," 2006 IEEE Intl. Conf. on Acoustics, Speech, and Signal Processing, Toulouse France, submitted Oct. 2005. (.pdf)

  • S. Grikschat, J. Costa and A.O. Hero, "Dual rooted-diffusions for clustering and classification on manifolds," 2006 IEEE Intl. Conf. on Acoustics, Speech, and Signal Processing, Toulouse France, submitted Oct. 2005. (.pdf)

  • M. Ting and A.O. Hero, "Detection of a random walk signal in the regime of low signal to noise ratio and long observation time," 2006 IEEE Intl. Conf. on Acoustics, Speech, and Signal Processing, Toulouse France, submitted Oct. 2005. (.pdf)

  • P-J Chung, J.F. Boehme, C.F. Mecklenbraeucker and A.O. Hero, "Multiple Signal Detection Using the Benjamini-Hochberg Procedure," IEEE Workshop on Computational advances in multi-sensor adaptive processing (CAMSAP), Dec. 2005. (.pdf)

  • D. Blatt and A. O. Hero, "From weighted classification to policy search", to appear in Neural Information Processing Symposium (NIPS) Dec. 2005. Submission (.pdf)

  • N. Patwari and A.O. Hero, "Manifold learning visualization of network traffic data," SIGCOMM 2005 Workshop on Mining Network Data, Philadelphia, Aug. 2005. (.pdf)

  • D. Blatt and A.O. Hero, "APOCS: a convergent source localization algorithm for sensor networks," IEEE Workshop on Statistical Signal Processing (SSP), Bordeaux, July 2005. (.pdf)

  • P-J Chung, J.F. Boehme, C.F. Mecklenbraeucker and A.O. Hero, "On signal detection using the Benjamini--Hochberg procedure," IEEE Workshop on Statistical Signal Processing (SSP), Bordeaux, July 2005. (.pdf)

  • J.A. Costa, A. Girotra and A.O. Hero, "Estimating Local Intrinsic Dimension with k-Nearest Neighbor Graphs," IEEE Workshop on Statistical Signal Processing (SSP), Bordeaux, July 2005. (.pdf)

  • D. Zhu, A. Hero, "Identifying differentially expressed genes from probe level intensities in longitudinal Affymetrix microarray experiments," IEEE Workshop on Statistical Signal Processing (SSP), Bordeaux, July 2005. (.pdf)

  • R. Rangarajan, R. Raich, and A.O. Hero, "Sequential Design of Experiments for a Rayleigh Inverse Scattering Problem," submitted to IEEE Workshop on Statistical Signal Processing (SSP), Bordeaux, July 2005. (.pdf)

  • H. Park, P.H Bland, A.O. Hero III, and C.R. Meyer, "Least Biased Target Selection in Probabilistic Atlas Construction," submitted to Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI), 2005.

  • D. Zhu, A.O. Hero, H. Cheng, M. Akimoto, R. Khanna and A. Swaroop, "Network constrained clustering for gene microarray data," Annual Meeting of International Society for Computational Biology, Detroit, 2005.

  • A. Rao, A.O. Hero, J.D. Engel, D.J. States, and D. Zhu, "Inferring Time-varying Network Topologies from Gene Expression Data," Proc. of IEEE Workshop on Genomic Signal Processing and Statistics (GENSIPS) , Newport, May 2005. (.pdf)

  • D. Zhu and A. O. Hero, "Unsupervised posterior analysis of signaling pathways from gene microarray data," Proc. of IEEE Workshop on Genomic Signal Processing and Statistics (GENSIPS) , Newport, May 2005. (.pdf)

  • J. Costa and A. O. Hero, "Classification constrained dimensionality reduction," (.pdf), Proc. of ICASSP , Philadelphia, March, 2005.

  • D. Zhu and A. O. Hero, "Gene co-expression network discovery with controlled statistical and biological significance," (.pdf), Proc. of ICASSP , Philadelphia, March, 2005.

  • D. Zhu and A. O. Hero, "Network constrained clustering for gene microarray data," (.pdf), Proc. of ICASSP , Philadelphia, March, 2005.

  • R. Rangangaran, R. Raich and A. O. Hero, "Optimal experimental design for an inverse scattering problem," (.pdf), Proc. of ICASSP , Philadelphia, March, 2005.

  • A. O. Hero and D. Blatt, "Sensor network source localization via projection onto convex sets (POCS)," (.pdf), Proc. of ICASSP , Philadelphia, March, 2005.

  • D. Blatt and A. O. Hero, "Tests for global maximum of the likelihood function," (.pdf), Proc. of ICASSP , Philadelphia, March, 2005.

  • J. Costa, N. Patwari and A. O. Hero, "Achieving high-accuracy distributed localization in sensor networks," (.pdf), Proc. of ICASSP , Philadelphia, March, 2005.

  • E. Oubel, H. Neemuchwala, A. O. Hero, L. Boisrobert, M. Laclaustra, A. Frangi "Assessment of artery dilation by using image registration based on spatial features," (.pdf), Medical Imaging 2005: Image Processing , Eds. J.M Fitzpatrick and J.M. Reinhardt, Proceedings of SPIE vol. 5747, 2005.

  • H. Neemuchwala and A. O. Hero, "Image registration in high dimensional feature space," (.pdf), Proc. of SPIE Conference on Electronic Imaging , San Jose, Jan. 2005.

  • S. Ahn, J.A. Fessler, D. Blatt, and A. Hero, "Incremental optimization transfer algorithms: application to transmission tomography", (.pdf) , IEEE Conf on Medical Imaging, Nov. 2004.

  • J. Costa and A. O. Hero, "Learning intrinsic dimension and intrinsic entropy of high dimensional datasets," (.pdf), Proc. of EUSIPCO , Vienna, Sept, 2004.

  • M. Ting, A. O. Hero, and J. Fessler, ",Two state Markov modelling and detection of single electron spin signals" (.pdf), Proc. of EUSIPCO , Vienna, Sept, 2004.

  • P.-J. Chung, J.F. Bohme, A.O. Hero, and C.F. Mecklenbrauker, "Signal detection using a multiple hypothesis test," (.pdf), In Proc. Third IEEE Sensor Multichannel Signal Processing Workshop, Barcelona, Spain, 2004.
  • D. Blatt and A. O. Hero, "Distributed maximum likelihood estimation in sensor networks," (.pdf), Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc, Montreal, May, 2004.

  • J. Costa and A. O. Hero, "Manifold learning using Euclidean K-nearest neighbor graphs," (.pdf), Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc, Montreal, May, 2004.

  • J. Costa and A. O. Hero, "Entropic graphs for Manifold Learning," (.pdf) , Proc. of IEEE Asilomar Conf. on Sig, Syst., and Comm.,, Pacific Grove CA, Nov. 2003

  • C.-Y. Yip, A. O. Hero, D. Rugar, and J. Fessler, "Detection of Bistatic Electron Spin Signals in Magnetic Resonance Force Microscopy (MRFM)," , Proc. of IEEE Asilomar Conf. on Sig, Syst., and Comm.,, Pacific Grove CA, Nov. 2003

  • D. Blatt and A. O. Hero "Asymptotic Distribution of Log-Likelihood Maximization Based Algorithms and Applications", (.pdf) in Proc. Energy Minimization Methods in Computer Vision and Pattern Recognition , Lisbon, July 2003

  • J. Costa, A. O. Hero and C. Vignat, "On Solutions to Multivariate Maximum $\alpha$-entropy Problems", (.pdf) in Proc. Energy Minimization Methods in Computer Vision and Pattern Recognition, Lisbon, July 2003

  • T. Kragh and A. O. Hero "Image resolution-variance tradeoffs using the uniform Cram\`{e}r-Rao bound", (.pdf) in Proc. XI European Signal Processing Conference, Toulouse France, Sept 2002.

  • H.S. Kim and A. O. Hero "Comparison of GLR and maximal invariant detectors under structured clutter covariance", (.ps.Z) , (.ps) , or (.pdf) Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc., Salt Lake City UT May 2001.

  • H. S. Kim and A. O. Hero, "When is a maximal invariant hypothesis test better than the GLRT?", (.ps.z) , (.ps) , or (.pdf) , Proc. of IEEE Asilomar Conference on Sig, Syst., and Comm.,, Pacific Grove CA, Oct. 2000.

  • H.S. Kim and A. O. Hero "Adaptive target detection across a clutter boundary: GLRT and maximally invariant detectors", (.ps) , 2000 IEEE International Conf. on Image Processing,, Vancouver, Oct. 2000.

  • A. O. Hero and O. Michel, "Renyi information divergence via measure transformations on minimal spanning trees," (.ps.Z) , (.ps) or (.pdf) Proceedings of the IEEE 2000 International Symposium on Information Theory , Sorrento, Italy.

  • A. O. Hero, "On the problem of granulometry for a degraded Boolean image model", (.ps.Z) , (.ps) or (.pdf) 1999 IEEE International Conf. on Image Processing,, Kobe, Japan Oct. 1999.

  • A. O. Hero and O. Michel, "Estimation of R\'enyi Information Divergence via Pruned Minimal Spanning Trees", (.ps.Z) , (.ps) , or (.pdf) , 1999 IEEE Workshop on Higher Order Statistics, Caesaria ISRAEL, 1999.

  • A. O. Hero and O. Michel, "Robust Entropy Estimation Strategies Based on Edge Weighted Random Graphs (with corrections)", (.ps.Z) , (.ps) , (.pdf) 1998 SPIE International Symposium on Optical Science, Engineering and Instrumentation, San Diego, July. 1998.

  • A.O. Hero and O. Michel "Robust estimation of point process intensity features using K-minimal spanning trees," (.ps.Z) Proceedings of IEEE Intl. Symposium on Inform. Theory , June. 1997.

  • B. Baygun and A. O. Hero, "An iterative solution to the min-max simultaneous detection and estimation problem", (.ps.Z) , (.ps) , (.pdf) , 1996 IEEE Workshop on Statistical Signal and Array Processing, Corfu, Greece, June. 1996.

  • A. O. Hero and M. Usman "Achievable regions in the bias variance plane for parametric estimation problems," (.ps.Z) Proceedings of the IEEE 1995 International Symposium on Information Theory , Whistler, BC, 1995.

  • O. Michel and A. O. Hero, "Tree structured non-linear signal modeling and prediction," (.ps.Z), (.ps) or (.pdf), Proceedings of the IEEE 1995 International Conference on Acoustics, Speech and Signal Processing , Detroit, pp. 1689-1692, 1995.

  • M. Usman, A.O. Hero and J. A. Fessler "Uniform CR bound: implementation issues and applications to image reconstruction," (.ps.Z) , (.ps) , (.pdf) , Proceedings of the IEEE 1994 Nuclear Science Symposium and Medical Imaging Conference , Norfolk, Oct. 1994.

  • M. Usman, A.O. Hero and J. A. Fessler, "Bias-variance tradeoffs analysis using uniform CR bound for images" Proceedings of the 1994 IEEE Conference on Image Processing , Austin, pp. 835-839, Nov. 1994.

  • M. Usman and A.O. Hero, "Recursive CR-bounds: algebraic and statistical acceleration," (.ps.Z) Proceedings of the IEEE 1994 International Conference on Acoustics, Speech and Signal Processing, Adelaide, Australia, pp. IV.5-8, April 1994.

  • J A Fessler and A O Hero.
    "Complete-data spaces and generalized EM algorithms" Proc. IEEE Conf. Acoust. Speech Sig. Proc., vol. 4, pp. 1-4, 1993.

  • A O Hero, J A Fessler, and W L Rogers. "A fast recursive algorithm for computing CR-type bounds for image reconstruction problems", (.ps.Z) Conf. Rec. of the IEEE Nuc. Sci. Symp. Med. Im. Conf., vol. 2, pp. 1188-1190, 1992.

  • B. Baygun and A.O. Hero, "Further Results on tradeoffs between detection and estimation," Proceedings of the IEEE 1992 International Conference on Acoustics, Speech, and Signal Processing, Vol. III, pp. 461-465, San Francisco, CA, March 1992.

  • J.K. Kim and A.O. Hero, "Error intensity measures for multi-parameter tracking and passive bearing estimation," Proceedings of the IEEE 1989 International Conference on Acoustics, Speech, and Signal Processing, pp. 2641-2644, Glasgow, UK, May 1989.

    Prof. Alfred O. Hero III ,
    Dept. of Electrical Engineering and Computer Science
    The University of Michigan
    1301 Beal Avenue
    Ann Arbor, MI 48109-2122
    Tel. (313) 763-0564
    FAX: (313) 763-8041
    WWW: http://www.eecs.umich.edu/~hero/hero.html
    email: