Aapo Hyvärinen

professori

Yhteystiedot

Aapo.Hyvarinen[at]cs.helsinki.fi
http://www.cs.helsinki.fi/u/ahyvarin/
A330
(09) 19151415

Vastuullinen tutkija ryhmässä

Kuulustelija kokeisiin

(ilmoittautumiseen)

Unsupervised Machine Learning
Unsupervised Machine Learning
Unsupervised Machine Learning

  • Register 12.04.2013 (Uusintakoe)

Opetus

2014 kevät
Unsupervised Machine Learning
Unsupervised Machine Learning
Unsupervised Machine Learning

  • Luennoija, vastuuhenkilö

2013 kevät
Seminar: Neuroinformatics 5
Seminar: Neuroinformatics 5
Seminar: Neuroinformatics 5

  • Vastuuhenkilö

2013 kevät
Unsupervised Machine Learning
Unsupervised Machine Learning
Unsupervised Machine Learning

  • Luennoija, vastuuhenkilö

2012 kevät
Unsupervised Machine Learning
Unsupervised Machine Learning
Unsupervised Machine Learning

  • Luennoija, vastuuhenkilö

2012 kevät
Seminar: Neuroinformatics 4
Seminar: Neuroinformatics 4
Seminar: Neuroinformatics 4

  • Vastuuhenkilö

2011 kevät
Unsupervised Machine Learning
Unsupervised Machine Learning
Unsupervised Machine Learning

  • Luennoija, vastuuhenkilö

2011 kevät
Seminar: Neuroinformatics 3
Seminar: Neuroinformatics 3
Seminar: Neuroinformatics 3

  • Vastuuhenkilö

2010 kevät
Unsupervised Machine Learning
Unsupervised Machine Learning
Unsupervised Machine Learning

  • Luennoija, vastuuhenkilö

2010 kevät
Seminar: Neuroinformatics 2
Seminar: Neuroinformatics 2
Seminar: Neuroinformatics 2

  • Vastuuhenkilö

2009 kevät
Unsupervised Machine Learning
Unsupervised Machine Learning
Unsupervised Machine Learning

  • Luennoija, vastuuhenkilö

2008 syksy
Seminar: Neuroinformatics
Seminar: Neuroinformatics
Seminar: Neuroinformatics

  • Vastuuhenkilö

2008 kevät
Modelling of Vision
Modellering av vision
Modelling of Vision

  • Luennoija, vastuuhenkilö

2007 kevät
Modelling of Vision
Modellering av vision
Modelling of Vision

  • Luennoija, vastuuhenkilö

2006 kevät
Modelling of Vision
Modellering av vision
Modelling of Vision

  • Luennoija, vastuuhenkilö

2005 kevät
Modelling of Vision
Modellering av vision
Modelling of Vision

  • Luennoija, vastuuhenkilö

2004 kesä
Introduction to Independent Component Analysis
Introduction to Independent Component Analysis
Introduction to Independent Component Analysis

  • Luennoija

2004 kevät
Modelling of Vision
Modellering av vision
Modelling of Vision

  • Luennoija, vastuuhenkilö

Julkaisut

Julkaisut on kerätty TUHAT-tietokannan profiilista.

2012

Characterization of neuromagnetic brain rhythms over time scales of minutes using spatial independent component analysis

Ramkumar, P. , Parkkonen, L. , Hari, R. & Hyvärinen, A. 2012 In : Human Brain Mapping. 33, 7, p. 1648-1662. 15 p.

Publication: Contribution to journal › A1 Refereed journal article

Estimation of causal orders in a linear non-gaussian acyclic model: a method robust against latent confounders

Tashiro, T. , Shimizu, S. , Hyvärinen, A. & Washio, T. 2012 p. 491-498. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Learning a selectivity-invariance-selectivity feature extraction architecture for images

Gutmann, M. U. & Hyvärinen, A. 2012

Publication: Conference contribution › A4 Article in conference publication (refereed)

Noise-Contrastive Estimation of Unnormalized Statistical Models, with Applications to Natural Image Statistics

Gutmann, M. U. & Hyvärinen, A. 2012 In : Journal of Machine Learning Research. 13, p. 307-361. 55 p.

Publication: Contribution to journal › A1 Refereed journal article

Structural equations and divisive normalization for energy-dependent component analysis

Hirayama, J. & Hyvärinen, A. 2012 9 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Topographic Analysis of Correlated Components

Sasaki, H. , Gutmann, M. U. , Shouno, H. & Hyvärinen, A. 2012 In : JMRL : Workshop and Conference Proceedings. 25, 14 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

2011

A general linear non-Gaussian state-space model: Identifiability, identification, and application

Zhang, K. & Hyvärinen, A. 2011 In : JMRL : Workshop and Conference Proceedings. 20, p. 113–128. 16 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Complex-valued independent component analysis of natural images

Laparra, V. , Gutmann, M. U. , Malo, J. & Hyvärinen, A. 2011 p. 213-220. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

DirectLiNGAM: A direct method for learning a linear non-Gaussian structural equation model

Shimizu, S. , Inazumi, T. , Sogawa, Y. , Hyvärinen, A. , Kawahara, Y. , Washio, T. , Hoyer, P. & Bollen, K. 2011 In : Journal of Machine Learning Research. 12, 24 p.

Publication: Contribution to journal › A1 Refereed journal article

Estimating Exogenous Variables in Data with More Variables than Observations

Sogawa, Y. , Shimizu, S. , Hyvärinen, A. , Washio, T. , Shimamura, T. & Imoto, S. 2011 In : Neural Networks. 24, 8, p. 875-880.

Publication: Contribution to journal › A1 Refereed journal article

Extracting coactivated features from multiple datasets

Gutmann, M. U. & Hyvärinen, A. 2011 p. 323-330. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Hermite Polynomials and Measures of Non-Gaussianity

Puuronen, J. S. & Hyvärinen, A. 2011 p. 205--212.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Learning Topographic Representations for Linearly Correlated Components

Sasaki, H. , Gutmann, M. U. , Shouno, H. & Hyvärinen, A. 2011 9 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Testing the ICA mixing matrix based on inter-subject or inter-session consistency

Hyvärinen, A. 2011 In : NeuroImage. 58, 1, p. 122-136.

Publication: Contribution to journal › A1 Refereed journal article

2010

A Family of Computationally Efficient and Simple Estimators for Unnormalized Statistical Models

Pihlaja, M. , Gutmann, M. U. & Hyvärinen, A. J. 2010 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

A Two-Layer Model of Natural Stimuli Estimated with Score Matching

Köster, U. & Hyvärinen, A. 2010 In : Neural Computation. 22, 9, p. 2308-2333. 26 p.

Publication: Contribution to journal › A1 Refereed journal article

Characterization of spontaneous neuromagnetic brain rhythms using independent component analysis of short-time Fourier transforms

Ramkumar, P. , Hyvärinen, A. , Parkkonen, L. & Hari, R. 2010

Publication: Conference contribution › A4 Article in conference publication (refereed)

Discovery of exogenous variables in data with more variables than observations

Sogawa, Y. , Shimizu, S. , Hyvärinen, A. , Washio, T. , Shimamura, T. & Imoto, S. 2010 p. 67-76.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Distinguishing causes from effects using nonlinear acyclic causal models

Zhang , K. & Hyvärinen, A. 2010 p. 157–164 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

Estimation of a Structural Vector Autoregression Model Using Non-Gaussianity

Hyvärinen, A. , Zhang , K. , Shimizu , S. & Hoyer, P. O. 2010 In : Journal of Machine Learning Research. 11 , p. 1709–1731 . 23 p.

Publication: Contribution to journal › A1 Refereed journal article

Independent component analysis of short-time Fourier transforms for spontaneous EEG/MEG analysis

Hyvärinen , A. , Ramkumar, P. , Parkkonen, L. & Hari, R. 2010 In : NeuroImage. 49, 1, p. 257-271. 15 p.

Publication: Contribution to journal › A1 Refereed journal article

Iterative algorithms

Zarzoso , V. & Hyvärinen, A. J. 2010 In: Handbook on Independent Component Analysis and Blind Source Separation . Academic Press

Publication: Contribution to book/anthology › A3 Contribution to book/other compilations (refereed)

Noise-contrastive estimation: A new estimation principle for unnormalized statistical models

Gutmann, U. M. & Hyvärinen, A. 2010 p. 297-304. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Pairwise measures of causal direction in linear non-gaussian acyclic models

Hyvärinen, A. 2010 p. 1-16. 16 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Source separation and higher-order causal analysis of MEG and EEG

Zhang, K. & Hyvärinen, A. 2010 p. 709-716. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Sparse and low-rank estimation of time-varying markov networks with alternating direction method of multipliers

Hirayama, J. , Hyvärinen, A. & Ishii, S. 2010 p. 371-379. 9 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Statistical models of natural images and cortical visual representation

Hyvärinen, A. 2010 In : Topics in Cognitive Science. 2 , 2, p. 251-264. 14 p.

Publication: Contribution to journal › A2 Review in scientific journal

WordICA-emergence of linguistic representations for words by independent component analysis

Honkela, T. , Hyvärinen, A. & Väyrynen, J. J. 2010 In : Natural Language Engineering. 16, 3, p. 277-308. 32 p.

Publication: Contribution to journal › A1 Refereed journal article

2009

A direct method for estimating a causal ordering in a linear non-gaussian acyclic model

Shimizu, S. , Hyvärinen, A. , Kawahara, Y. & Washio, T. 2009

Publication: Conference contribution › A4 Article in conference publication (refereed)

Causality discovery with additive disturbances: An informationtheoretical perspective

Zhang , K. & Hyvärinen, A. 2009 p. 570–585 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

Estimating Markov random field potentials for natural images

Köster, U. , Lindgren, J. T. & Hyvärinen, A. 2009 p. 515-522. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Estimation of linear non-Gaussian acyclic models for latent factors

Shimizu, S. , Hoyer, P. O. & Hyvärinen, A. 2009 In : Neurocomputing. 72, 7-9, p. 2024-2027. 4 p.

Publication: Contribution to journal › A1 Refereed journal article

ICA with sparse connections: Revisited

Zhang , K. , Peng, H. , Chan, L. & Hyvärinen, A. J. 2009 p. 195–202 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

Learning features by contrasting natural images with noise

Gutmann, M. U. & Hyvärinen, A. 2009 p. 623-632. 10 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Learning natural image structure with a horizontal product model

Köster, U. , Lindgren, J. T. , Gutmann, M. & Hyvärinen, A. 2009 p. 507-514. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Learning reconstruction and prediction of natural stimuli by a population of spiking neurons

Gutmann, M. U. , Hyvärinen, A. & Aihara , K. 2009

Publication: Conference contribution › A4 Article in conference publication (refereed)

Learning spike-timings based representations of sensory stimuli with leaky integrate-and-fire neurons

Gutmann, M. U. & Hyvärinen, A. 2009 In : BMC Neuroscience. 10, Suppl. 1, p. P144. 2 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Modelling image complexity by independent component analysis, with application to content-based image retrieval

Perkiö, J. & Hyvärinen, A. 2009 p. 704-714. 11 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Natural image statistics: a probabilistic approach to early computational vision

Hyvärinen, A. , Hurri, J. & Hoyer, P. O. 2009 New York: Springer.

Publication: Book/anthology › C1 Published scientific monograph

Natural image statistics: energy-based models estimated by score matching

Köster, U. & Hyvärinen, A. 2009 p. 16-25. 10 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

On the identifiability of the post-nonlinear causal model

Zhang , K. & Hyvärinen, A. 2009 9 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Representation of cross-frequency spatial phase relationships in human visual cortex

Henriksson, L. , Hyvärinen, A. & Vanni, S. 2009 In : Journal of Neuroscience. 29, 45, p. 14342-14351. 10 p.

Publication: Contribution to journal › A1 Refereed journal article

Unsupervised learning by discriminating data from artificial noise

Gutmann, M. U. & Hyvärinen, A. 2009

Publication: Conference contribution › A4 Article in conference publication (refereed)

Visual features underlying perceived brightness as revealed by classification images

Kurki, I. , Peromaa, T. , Hyvärinen, A. & Saarinen, J. 2009 In : PLoS One. 4, 10, p. e7432. 8 p.

Publication: Contribution to journal › A1 Refereed journal article

2008

Causal discovery of linear acyclic models with arbitrary distributions

Hoyer, P. O. , Hyvärinen, A. , Scheines, R. , Spirtes, P. , Ramsey, J. , Lacerda, G. & Shimizu, S. 2008 p. 282–289 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

Causal modelling combining instantaneous and lagged effects: an identifiable model based on non-Gaussianity

Hyvärinen, A. , Shimizu, S. & Hoyer, P. O. 2008 p. 424–431 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

Discovery of linear non-gaussian acyclic models in the presence of latent classes

Shimizu, S. & Hyvärinen, A. 2008 p. 752-761. 10 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Estimation theory and information geometry based on denoising

Hyvärinen, A. 2008

Publication: Conference contribution › A4 Article in conference publication (refereed)

Learning encoding and decoding filters for data representation with a spiking neuron

Gutmann, M. , Hyvärinen, A. J. & Aihara , K. 2008

Publication: Conference contribution › A4 Article in conference publication (refereed)

On the learning of nonlinear visual features from natural images by optimizing response energies

Lindgren, J. T. & Hyvärinen, A. 2008 p. 1026-1033. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Optimal approximation of signal priors

Hyvärinen, A. 2008 In : Neural Computation. 20, 12, p. 3087-3110. 24 p.

Publication: Contribution to journal › A1 Refereed journal article

Spatial dependencies between local luminance and contrast in natural images

Lindgren, J. T. , Hurri, J. & Hyvärinen, A. 2008 In : Journal of vision. 8, 12, p. 1-13. 13 p.

Publication: Contribution to journal › A1 Refereed journal article

Spatial frequency tuning in human retinotopic visual areas

Henriksson, L. , Nurminen, L. , Hyvärinen, A. & Vanni, S. 2008 In : Journal of vision. 8, 10, p. 1-13. 13 p.

Publication: Contribution to journal › A1 Refereed journal article

Unsupervised learning of dependencies between local luminance and contrast in natural images

Lindgren, J. T. , Hurri, J. & Hyvärinen, A. 2008 p. 356-362. 7 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

2007

A two-layer ICA-like model estimated by score matching

Köster, U. & Hyvärinen, A. 2007 p. 798-807. 10 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Behavioural priors: learning to search efficiently in action planning

Hyvärinen, A. 2007 p. 324-328. 5 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Complex cell pooling and the statistics of natural images

Hyvärinen, A. & Köster, U. 2007 In : Network: Computation in Neural Systems . 18, 2, p. 81 - 100. 20 p.

Publication: Contribution to journal › A1 Refereed journal article

Connections between score matching, contrastive divergence, and pseudolikelihood for continuous-valued variables

Hyvärinen, A. 2007 In : IEEE Transactions on Neural Networks. 18, 5, p. 1529-1531. 3 p.

Publication: Contribution to journal › A1 Refereed journal article

Emergence of conjunctive visual features by quadratic independent component analysis

Lindgren, J. T. & Hyvärinen, A. 2007 p. 897-904. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Equivalence of some common linear feature extraction techniques for appearance-based object recognition tasks

Asuncion Vicente, M. , Hoyer, P. O. & Hyvärinen, A. 2007 In : IEEE Transactions on Pattern Analysis and Machine Intelligence. 29, 5, p. 896-900. 5 p.

Publication: Contribution to journal › A1 Refereed journal article

Some extensions of score matching

Hyvärinen, A. 2007 In : Computational Statistics & Data Analysis. 51, 5, p. 2499-2512. 14 p.

Publication: Contribution to journal › A1 Refereed journal article

The statistical properties of local log-contrast in natural images

Lindgren, J. T. , Hurri, J. & Hyvärinen, A. 2007 p. 354-363. 10 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Unsupervised learning of an embodied representation for action selection

Hyvärinen, A. 2007 p. 658-665. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

2006

A linear non-gaussian acyclic model for causal discovery

Shimizu, S. , Hoyer, P. O. , Hyvärinen, A. & Kerminen, A. 2006 In : Journal of Machine Learning Research. 7, p. 2003-2030. 28 p.

Publication: Contribution to journal › A1 Refereed journal article

A quasi-stochastic gradient algorithm for variance-dependent component analysis

Hyvärinen, A. & Shimizu , S. 2006 p. 211–220 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

Collinear context (and learning) change the profile of the perceptual filter

Kurki, I. , Hyvärinen, A. & Laurinen, P. 2006 In : Vision Research. 46, p. 2009-2014. 6 p.

Publication: Contribution to journal › A1 Refereed journal article

Consistency of pseudolikelihood estimation of fully visible Boltzmann machines

Hyvärinen, A. 2006 In : Neural Computation. 18, p. 2283-2292. 10 p.

Publication: Contribution to journal › A1 Refereed journal article

FastISA: A fast fixed-point algorithm for independent subspace analysis

Hyvärinen, A. J. & Köster , U. 2006

Publication: Conference contribution › A4 Article in conference publication (refereed)

Finding a causal ordering via independent component analysis

Shimizu, S. , Hyvärinen, A. , Hoyer, P. O. & Kano, Y. 2006 In : Computational Statistics & Data Analysis. 50, p. 3278-3293. 16 p.

Publication: Contribution to journal › A1 Refereed journal article

Learning to segment any random vector

Hyvärinen, A. J. & Perkiö, J. P. 2006 p. 4167–4172 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

New permutation algorithms for causal discovery using ICA

Hoyer, P. O. , Shimizu, S. , Hyvärinen, A. , Kerminen, A. & Kano, Y. 2006 p. 115-122. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

Testing significance of mixing and demixing coefficients in ICA

Shimizu, S. , Hyvärinen, A. , Hoyer, P. O. , Kerminen, A. & Kano, Y. 2006 p. 901-908. 8 p.

Publication: Conference contribution › A4 Article in conference publication (refereed)

2005

A generalized least squares approach to blind separation of sources which have variance dependencies

Shimizu, S. , Hyvärinen, A. J. & Kano, Y. 2005

Publication: Conference contribution › A4 Article in conference publication (refereed)

A unifying model for blind separation of independent sources

Hyvärinen, A. 2005 In : Signal Processing. 85, p. 1419-1427. 9 p.

Publication: Contribution to journal › A1 Refereed journal article

Discovery of non-gaussian linear causal models using ICA

Shimizu, S. , Hyvärinen, A. J. , Kano, Y. & Hoyer, P. O. 2005 p. 526–533 .

Publication: Conference contribution › A4 Article in conference publication (refereed)

Emergence of linguistic features: Independent component analysis of contexts

Honkela, T. , Hyvärinen, A. J. & Väyrynen , J. 2005

Publication: Conference contribution › A4 Article in conference publication (refereed)

Estimation of non-normalized statistical models by score matching

Hyvarinen, A. 2005 In : Journal of Machine Learning Research. 6, p. 695-709. 15 p.

Publication: Contribution to journal › A1 Refereed journal article

Independent component analysis of fMRI group studies by self-organizing clustering

Esposito, F. , Scarabino, T. , Hyvärinen, A. , Himberg, J. , Formisano, E. , Comani, S. , Tedeschi, G. , Goebel, R. , Seifritz, E. & Di Salle, F. 2005 In : NeuroImage. 25, p. 193-205. 13 p.

Publication: Contribution to journal › A1 Refereed journal article

Statistical model of natural stimuli predicts edge-like pooling of spatial frequency channels in V2

Hyvärinen, A. , Gutmann, M. U. & Hoyer, P. O. 2005 In : BMC Neuroscience. 6, p. -.

Publication: Contribution to journal › A1 Refereed journal article

Statistical models of images and early vision

Hyvärinen, A. J. , Hoyer, P. O. , Hurri, J. & Gutmann, M. U. 2005 p. 1–14 .

Publication: Conference contribution › A4 Article in conference publication (refereed)