Outline Introduction Goal Methodology Results Discussion Conclusion 5/9/2008 2
|
|
- Pierce Austin
- 6 years ago
- Views:
Transcription
1 Group EEG (Electroencephalogram) l Anthony Hampton, Tony Nuth, Miral Patel (Portions credited to Jack Shelley-Tremblay and E. Keogh) 05/09/2008 5/9/2008 1
2 Outline Introduction Goal Methodology Results Discussion Conclusion 5/9/2008 2
3 Goals The goal of this project is to evaluate EEG data from 19 subjects using various techniques of mathematics. 5/9/2008 3
4 EEG A recording of the electrical waves that sweeps over the brain s surface. It is measured by the electrodes that is placed on top of the scalp. 5/9/2008 4
5 Parts of the brain We are interested in the Primary Motor Cortex, and Pre-motor Cortex 5/9/2008 5
6 Understand the Waves In neurophysiology,,anaction action potential (also known as a nerve impulse or spike) ) is a pulse- like wave of voltage that travels along several types of cell membranes. 5/9/2008 6
7 Placement International system, Place an Electrode on Each point. 5/9/2008 7
8 Event related Potentials An event-related potential (ERP) is any stereotyped electrophysiological response to an internal or external stimulus. More simply, it is any measured brain response that is directly the result of a thought or perception. By collecting multiple trials of the same type of stimuli, we can enhance the signal and reduce the noise using simple math(typically neuroscientist use this). 5/9/2008 8
9 Defined an Epoch A series of time points locked in a significant point time. The button press is our significant point in time. 5/9/2008 9
10 A subject s s data Example of an Epoch 5/9/
11 Same data Same data At a different Epoch 5/9/
12 Time Series A time series is a sequence of data points, measured typically at successive times, spaced at (often uniform) time intervals. 5/9/
13 Time Series What is a time series? 5/9/
14 What EM clustering does How do we classify points and estimate parameters of the models in a mixture at the same time? Adaptive soft clustering: EM.. Data points are assigned to each group with a probability bilit equal to a likelihood lih of that t point belonging to that group. 5/9/
15 What is EM - Expectation Maximization A statistical model that makes use of the finite Gaussian mixture models. A set of parameters are recomputed until a desired value is reached Initial variables are randomly initialized iti 5/9/
16 The methods of EM Initialization: Pick start values for parameters (for us it was making random models and setting a sigma) Iteratively process until parameters converge Expectation (E) step: Calculate weights for every data point and update the weights to affect further steps Maximization (M) step: Maximize a log likelihood function with the weights given by E step to update the parameters 5/9/
17 Evaluate Initialized 2 models of data using the mean of the EEG entered using the first half of data over time for the first model and the second half of over time for the second model Compared each model and created a weight matrix Normalized the data 5/9/
18 OSB algorithm OSB : Optimal Subsequence Bijection It is an algorithm that determines the optimal subsequence bijection between two sequences of real numbers. We were given a code tsdagjump4 that worked for only one channels and we modified so it can work for more than 1 channels.( works for 40 channels) Modification: Created difference matrix with each entry containing differences of corresponding elements. 5/9/
19 Why OSB algorithm? The OSB is efficient because we use DAG(Directed Acyclic Graph), cheapest path to find the solution. By using DAG in OSB, we get perfect and correct results on Time Series dataset. DAG helps us to get rid of outlier elements and get one-to to-one one or onto bijection of a sequences. Comparing OSB with DTW using warping window, OSB shows that by skipping elements improves results. 5/9/
20 Directed Acyclic Graph This is a simple example of DAG. By skipping over outlier elements we get perfect result. 5/9/
21 OSB algorithm This program is used to find: Ts - Time Series DAG Directed Acyclic Graph OSB between two sequences of real numbers D is to find distance between two elements. C is for the jump cost.(penalty for skipping an element) W- weight of edges 5/9/
22 OSB algorithm Find subsequences of two elements. Create dissimilarity matrix. Use shortest path algorithm on Directed Acyclic Graph. Find jump cost. Nodes are index pairs of matrix. The main thing in the algorithm is to find edge weights of DAG. 5/9/
23 Wavelet Wavelets are mathematical functions that cut up data into different frequency components, and then study each component with a resolution matched to its scale. (IEEE Computational Science and Engineering, Summer 1995, vol. 2, num. 2, published by the IEEE Computer Society) 5/9/
24 Discussion of Results We used OSB to obtain our results. Our results consist of two sequences a and b then find subsequences a of a and b of b so that a matches best with b. Results are divided on two parts: Cluster Precision - means x% of time that you will cluster an epoch correctly. Cluster Recall - means y% of time that you will cluster a known left or right button 5/9/
25 Example: Discussion of Results typeout1: [ ] = a rtypeout1: [ ] = b ltypeout2: [ ] = a rtypeout2: t2 [ ] = b For Cluster Precision: left button cluster: 76, right button cluster: 72 (from a and b) Formula : 76/ (76+72) = = 51% For Cluster Recall: left button cluster: 76, right button cluster: 28 (from a and b ) Now, we applied the formula so: 76/ (76+28) = = 73% Note: Apply same formula to find both right cluster precision and recall. 5/9/
26 Conclusion We re given total 19 subjects (EEG Datasets) but we derived correct result for only 10 subjects. Other 9 subjects gave us all zeros as a result. ltypeout1: [ ] rtypeout1: [ ] ltypeout2: [ ] rtypeout2: [ ]..error 5/9/
27 Extra References Yang Ran, Expectation Maximization : An Approach to Parameter Estimation, umd edu/~shaohua/enee698 a_f03/em.ppt Andrew Blake, Bill Freeman, Learning and Vision: Generative Methods -ppt ICCV 2003 October 12, /9/
28 Thank You 5/9/
EEG Group. Research Paper. By: Anthony Hampton. Tony Nuth. Miral Patel
EEG Group Research Paper By: Anthony Hampton Tony Nuth Miral Patel 1 Tables of Contents Introduction. Page 3 Methodology...Page 6 Analysis...Page 9 Appix..Page 11 References..Page 14 Code..Page 15 2 Introduction
More informationExpectation-Maximization. Nuno Vasconcelos ECE Department, UCSD
Expectation-Maximization Nuno Vasconcelos ECE Department, UCSD Plan for today last time we started talking about mixture models we introduced the main ideas behind EM to motivate EM, we looked at classification-maximization
More informationMachine Learning. Unsupervised Learning. Manfred Huber
Machine Learning Unsupervised Learning Manfred Huber 2015 1 Unsupervised Learning In supervised learning the training data provides desired target output for learning In unsupervised learning the training
More informationClustering Lecture 5: Mixture Model
Clustering Lecture 5: Mixture Model Jing Gao SUNY Buffalo 1 Outline Basics Motivation, definition, evaluation Methods Partitional Hierarchical Density-based Mixture model Spectral methods Advanced topics
More informationMissing variable problems
Missing variable problems In many vision problems, if some variables were known the maximum likelihood inference problem would be easy fitting; if we knew which line each token came from, it would be easy
More informationIntroduction to Mobile Robotics
Introduction to Mobile Robotics Clustering Wolfram Burgard Cyrill Stachniss Giorgio Grisetti Maren Bennewitz Christian Plagemann Clustering (1) Common technique for statistical data analysis (machine learning,
More informationLecture 8: The EM algorithm
10-708: Probabilistic Graphical Models 10-708, Spring 2017 Lecture 8: The EM algorithm Lecturer: Manuela M. Veloso, Eric P. Xing Scribes: Huiting Liu, Yifan Yang 1 Introduction Previous lecture discusses
More informationMotivation. Technical Background
Handling Outliers through Agglomerative Clustering with Full Model Maximum Likelihood Estimation, with Application to Flow Cytometry Mark Gordon, Justin Li, Kevin Matzen, Bryce Wiedenbeck Motivation Clustering
More informationHistograms. h(r k ) = n k. p(r k )= n k /NM. Histogram: number of times intensity level rk appears in the image
Histograms h(r k ) = n k Histogram: number of times intensity level rk appears in the image p(r k )= n k /NM normalized histogram also a probability of occurence 1 Histogram of Image Intensities Create
More informationLecture 7: Segmentation. Thursday, Sept 20
Lecture 7: Segmentation Thursday, Sept 20 Outline Why segmentation? Gestalt properties, fun illusions and/or revealing examples Clustering Hierarchical K-means Mean Shift Graph-theoretic Normalized cuts
More informationUnsupervised Learning : Clustering
Unsupervised Learning : Clustering Things to be Addressed Traditional Learning Models. Cluster Analysis K-means Clustering Algorithm Drawbacks of traditional clustering algorithms. Clustering as a complex
More informationK-Means Clustering 3/3/17
K-Means Clustering 3/3/17 Unsupervised Learning We have a collection of unlabeled data points. We want to find underlying structure in the data. Examples: Identify groups of similar data points. Clustering
More informationOptimal Subsequence Bijection
Seventh IEEE International Conference on Data Mining Optimal Subsequence Bijection Longin Jan Latecki, Qiang Wang, Suzan Koknar-Tezel, and Vasileios Megalooikonomou Temple University Department of Computer
More informationUnsupervised Learning: Clustering
Unsupervised Learning: Clustering Vibhav Gogate The University of Texas at Dallas Slides adapted from Carlos Guestrin, Dan Klein & Luke Zettlemoyer Machine Learning Supervised Learning Unsupervised Learning
More informationSegmentation & Grouping Kristen Grauman UT Austin. Announcements
Segmentation & Grouping Kristen Grauman UT Austin Tues Feb 7 A0 on Canvas Announcements No office hours today TA office hours this week as usual Guest lecture Thursday by Suyog Jain Interactive segmentation
More informationFitting D.A. Forsyth, CS 543
Fitting D.A. Forsyth, CS 543 Fitting Choose a parametric object/some objects to represent a set of tokens Most interesting case is when criterion is not local can t tell whether a set of points lies on
More information3. Data Structures for Image Analysis L AK S H M O U. E D U
3. Data Structures for Image Analysis L AK S H M AN @ O U. E D U Different formulations Can be advantageous to treat a spatial grid as a: Levelset Matrix Markov chain Topographic map Relational structure
More informationIBL and clustering. Relationship of IBL with CBR
IBL and clustering Distance based methods IBL and knn Clustering Distance based and hierarchical Probability-based Expectation Maximization (EM) Relationship of IBL with CBR + uses previously processed
More information10701 Machine Learning. Clustering
171 Machine Learning Clustering What is Clustering? Organizing data into clusters such that there is high intra-cluster similarity low inter-cluster similarity Informally, finding natural groupings among
More informationI How does the formulation (5) serve the purpose of the composite parameterization
Supplemental Material to Identifying Alzheimer s Disease-Related Brain Regions from Multi-Modality Neuroimaging Data using Sparse Composite Linear Discrimination Analysis I How does the formulation (5)
More informationEstimating Noise and Dimensionality in BCI Data Sets: Towards Illiteracy Comprehension
Estimating Noise and Dimensionality in BCI Data Sets: Towards Illiteracy Comprehension Claudia Sannelli, Mikio Braun, Michael Tangermann, Klaus-Robert Müller, Machine Learning Laboratory, Dept. Computer
More informationBus Detection and recognition for visually impaired people
Bus Detection and recognition for visually impaired people Hangrong Pan, Chucai Yi, and Yingli Tian The City College of New York The Graduate Center The City University of New York MAP4VIP Outline Motivation
More information10-701/15-781, Fall 2006, Final
-7/-78, Fall 6, Final Dec, :pm-8:pm There are 9 questions in this exam ( pages including this cover sheet). If you need more room to work out your answer to a question, use the back of the page and clearly
More informationAutomated fmri Feature Abstraction using Neural Network Clustering Techniques
NIPS workshop on New Directions on Decoding Mental States from fmri Data, 12/8/2006 Automated fmri Feature Abstraction using Neural Network Clustering Techniques Radu Stefan Niculescu Siemens Medical Solutions
More informationAssociation Rule Mining and Clustering
Association Rule Mining and Clustering Lecture Outline: Classification vs. Association Rule Mining vs. Clustering Association Rule Mining Clustering Types of Clusters Clustering Algorithms Hierarchical:
More informationMixture Models and EM
Mixture Models and EM Goal: Introduction to probabilistic mixture models and the expectationmaximization (EM) algorithm. Motivation: simultaneous fitting of multiple model instances unsupervised clustering
More informationIntroduction to Machine Learning. Xiaojin Zhu
Introduction to Machine Learning Xiaojin Zhu jerryzhu@cs.wisc.edu Read Chapter 1 of this book: Xiaojin Zhu and Andrew B. Goldberg. Introduction to Semi- Supervised Learning. http://www.morganclaypool.com/doi/abs/10.2200/s00196ed1v01y200906aim006
More informationGaussian Mixture Models For Clustering Data. Soft Clustering and the EM Algorithm
Gaussian Mixture Models For Clustering Data Soft Clustering and the EM Algorithm K-Means Clustering Input: Observations: xx ii R dd ii {1,., NN} Number of Clusters: kk Output: Cluster Assignments. Cluster
More informationFinal Exam Assigned: 11/21/02 Due: 12/05/02 at 2:30pm
6.801/6.866 Machine Vision Final Exam Assigned: 11/21/02 Due: 12/05/02 at 2:30pm Problem 1 Line Fitting through Segmentation (Matlab) a) Write a Matlab function to generate noisy line segment data with
More informationClustering: Classic Methods and Modern Views
Clustering: Classic Methods and Modern Views Marina Meilă University of Washington mmp@stat.washington.edu June 22, 2015 Lorentz Center Workshop on Clusters, Games and Axioms Outline Paradigms for clustering
More informationA Multiple-Line Fitting Algorithm Without Initialization Yan Guo
A Multiple-Line Fitting Algorithm Without Initialization Yan Guo Abstract: The commonest way to fit multiple lines is to use methods incorporate the EM algorithm. However, the EM algorithm dose not guarantee
More informationExpectation Maximization!
Expectation Maximization! adapted from: Doug Downey and Bryan Pardo, Northwestern University and http://www.stanford.edu/class/cs276/handouts/lecture17-clustering.ppt Steps in Clustering Select Features
More informationABSTRACT 1. INTRODUCTION 2. METHODS
Finding Seeds for Segmentation Using Statistical Fusion Fangxu Xing *a, Andrew J. Asman b, Jerry L. Prince a,c, Bennett A. Landman b,c,d a Department of Electrical and Computer Engineering, Johns Hopkins
More informationAnnouncements. Image Segmentation. From images to objects. Extracting objects. Status reports next Thursday ~5min presentations in class
Image Segmentation Announcements Status reports next Thursday ~5min presentations in class Project voting From Sandlot Science Today s Readings Forsyth & Ponce, Chapter 1 (plus lots of optional references
More informationCOMP 551 Applied Machine Learning Lecture 13: Unsupervised learning
COMP 551 Applied Machine Learning Lecture 13: Unsupervised learning Associate Instructor: Herke van Hoof (herke.vanhoof@mail.mcgill.ca) Slides mostly by: (jpineau@cs.mcgill.ca) Class web page: www.cs.mcgill.ca/~jpineau/comp551
More informationClustering in Ratemaking: Applications in Territories Clustering
Clustering in Ratemaking: Applications in Territories Clustering Ji Yao, PhD FIA ASTIN 13th-16th July 2008 INTRODUCTION Structure of talk Quickly introduce clustering and its application in insurance ratemaking
More informationExpectation Maximization (EM) and Gaussian Mixture Models
Expectation Maximization (EM) and Gaussian Mixture Models Reference: The Elements of Statistical Learning, by T. Hastie, R. Tibshirani, J. Friedman, Springer 1 2 3 4 5 6 7 8 Unsupervised Learning Motivation
More informationTight Clusters and Smooth Manifolds with the Harmonic Topographic Map.
Proceedings of the th WSEAS Int. Conf. on SIMULATION, MODELING AND OPTIMIZATION, Corfu, Greece, August -9, (pp8-) Tight Clusters and Smooth Manifolds with the Harmonic Topographic Map. MARIAN PEÑA AND
More informationCS145: INTRODUCTION TO DATA MINING
CS145: INTRODUCTION TO DATA MINING 08: Classification Evaluation and Practical Issues Instructor: Yizhou Sun yzsun@cs.ucla.edu October 24, 2017 Learnt Prediction and Classification Methods Vector Data
More informationUnsupervised Learning
Networks for Pattern Recognition, 2014 Networks for Single Linkage K-Means Soft DBSCAN PCA Networks for Kohonen Maps Linear Vector Quantization Networks for Problems/Approaches in Machine Learning Supervised
More informationECE 5424: Introduction to Machine Learning
ECE 5424: Introduction to Machine Learning Topics: Unsupervised Learning: Kmeans, GMM, EM Readings: Barber 20.1-20.3 Stefan Lee Virginia Tech Tasks Supervised Learning x Classification y Discrete x Regression
More informationSection 9. Human Anatomy and Physiology
Section 9. Human Anatomy and Physiology 9.1 MR Neuroimaging 9.2 Electroencephalography Overview As stated throughout, electrophysiology is the key tool in current systems neuroscience. However, single-
More information10601 Machine Learning. Hierarchical clustering. Reading: Bishop: 9-9.2
161 Machine Learning Hierarchical clustering Reading: Bishop: 9-9.2 Second half: Overview Clustering - Hierarchical, semi-supervised learning Graphical models - Bayesian networks, HMMs, Reasoning under
More informationUnsupervised Learning. Clustering and the EM Algorithm. Unsupervised Learning is Model Learning
Unsupervised Learning Clustering and the EM Algorithm Susanna Ricco Supervised Learning Given data in the form < x, y >, y is the target to learn. Good news: Easy to tell if our algorithm is giving the
More informationMixture Models and the EM Algorithm
Mixture Models and the EM Algorithm Padhraic Smyth, Department of Computer Science University of California, Irvine c 2017 1 Finite Mixture Models Say we have a data set D = {x 1,..., x N } where x i is
More informationClustering & Dimensionality Reduction. 273A Intro Machine Learning
Clustering & Dimensionality Reduction 273A Intro Machine Learning What is Unsupervised Learning? In supervised learning we were given attributes & targets (e.g. class labels). In unsupervised learning
More informationCS 2750 Machine Learning. Lecture 19. Clustering. CS 2750 Machine Learning. Clustering. Groups together similar instances in the data sample
Lecture 9 Clustering Milos Hauskrecht milos@cs.pitt.edu 539 Sennott Square Clustering Groups together similar instances in the data sample Basic clustering problem: distribute data into k different groups
More informationMATLAB Based Interactive Music Player using XBOX Kinect
1 MATLAB Based Interactive Music Player using XBOX Kinect EN.600.461 Final Project MATLAB Based Interactive Music Player using XBOX Kinect Gowtham G. Piyush R. Ashish K. (ggarime1, proutra1, akumar34)@jhu.edu
More information2/15/2009. Part-Based Models. Andrew Harp. Part Based Models. Detect object from physical arrangement of individual features
Part-Based Models Andrew Harp Part Based Models Detect object from physical arrangement of individual features 1 Implementation Based on the Simple Parts and Structure Object Detector by R. Fergus Allows
More informationDensity estimation. In density estimation problems, we are given a random from an unknown density. Our objective is to estimate
Density estimation In density estimation problems, we are given a random sample from an unknown density Our objective is to estimate? Applications Classification If we estimate the density for each class,
More informationCopyright Notice. Do not remove this notice. COMMONWEALTH OF AUSTRALIA Copyright Regulations 1969 WARNING
Copyright Notice University of South Australia (UniSA) Do not remove this notice. COMMONWEALTH OF AUSTRALIA Copyright Regulations 969 WARNING This material has been produced and communicated to you by
More informationSolution Sketches Midterm Exam COSC 6342 Machine Learning March 20, 2013
Your Name: Your student id: Solution Sketches Midterm Exam COSC 6342 Machine Learning March 20, 2013 Problem 1 [5+?]: Hypothesis Classes Problem 2 [8]: Losses and Risks Problem 3 [11]: Model Generation
More informationUnsupervised Learning Partitioning Methods
Unsupervised Learning Partitioning Methods Road Map 1. Basic Concepts 2. K-Means 3. K-Medoids 4. CLARA & CLARANS Cluster Analysis Unsupervised learning (i.e., Class label is unknown) Group data to form
More informationBreaking it Down: The World as Legos Benjamin Savage, Eric Chu
Breaking it Down: The World as Legos Benjamin Savage, Eric Chu To devise a general formalization for identifying objects via image processing, we suggest a two-pronged approach of identifying principal
More informationRandom projection for non-gaussian mixture models
Random projection for non-gaussian mixture models Győző Gidófalvi Department of Computer Science and Engineering University of California, San Diego La Jolla, CA 92037 gyozo@cs.ucsd.edu Abstract Recently,
More informationSPARSE COMPONENT ANALYSIS FOR BLIND SOURCE SEPARATION WITH LESS SENSORS THAN SOURCES. Yuanqing Li, Andrzej Cichocki and Shun-ichi Amari
SPARSE COMPONENT ANALYSIS FOR BLIND SOURCE SEPARATION WITH LESS SENSORS THAN SOURCES Yuanqing Li, Andrzej Cichocki and Shun-ichi Amari Laboratory for Advanced Brain Signal Processing Laboratory for Mathematical
More informationEffect of age and dementia on topology of brain functional networks. Paul McCarthy, Luba Benuskova, Liz Franz University of Otago, New Zealand
Effect of age and dementia on topology of brain functional networks Paul McCarthy, Luba Benuskova, Liz Franz University of Otago, New Zealand 1 Structural changes in aging brain Age-related changes in
More informationCS 229 Midterm Review
CS 229 Midterm Review Course Staff Fall 2018 11/2/2018 Outline Today: SVMs Kernels Tree Ensembles EM Algorithm / Mixture Models [ Focus on building intuition, less so on solving specific problems. Ask
More informationSome questions of consensus building using co-association
Some questions of consensus building using co-association VITALIY TAYANOV Polish-Japanese High School of Computer Technics Aleja Legionow, 4190, Bytom POLAND vtayanov@yahoo.com Abstract: In this paper
More informationConvolution Product. Change of wave shape as a result of passing through a linear filter
Convolution Product Change of wave shape as a result of passing through a linear filter e(t): entry signal (source signal) r(t): impulse response (reflectivity of medium) (a) The spikes are sufficiently
More informationBESA Research. CE certified software package for comprehensive, fast, and user-friendly analysis of EEG and MEG
BESA Research CE certified software package for comprehensive, fast, and user-friendly analysis of EEG and MEG BESA Research choose the best analysis tool for your EEG and MEG data BESA Research is the
More informationCS 543: Final Project Report Texture Classification using 2-D Noncausal HMMs
CS 543: Final Project Report Texture Classification using 2-D Noncausal HMMs Felix Wang fywang2 John Wieting wieting2 Introduction We implement a texture classification algorithm using 2-D Noncausal Hidden
More informationIntroduction to Machine Learning CMU-10701
Introduction to Machine Learning CMU-10701 Clustering and EM Barnabás Póczos & Aarti Singh Contents Clustering K-means Mixture of Gaussians Expectation Maximization Variational Methods 2 Clustering 3 K-
More informationhttp://www.xkcd.com/233/ Text Clustering David Kauchak cs160 Fall 2009 adapted from: http://www.stanford.edu/class/cs276/handouts/lecture17-clustering.ppt Administrative 2 nd status reports Paper review
More informationCluster Evaluation and Expectation Maximization! adapted from: Doug Downey and Bryan Pardo, Northwestern University
Cluster Evaluation and Expectation Maximization! adapted from: Doug Downey and Bryan Pardo, Northwestern University Kinds of Clustering Sequential Fast Cost Optimization Fixed number of clusters Hierarchical
More informationA Simple Generative Model for Single-Trial EEG Classification
A Simple Generative Model for Single-Trial EEG Classification Jens Kohlmorgen and Benjamin Blankertz Fraunhofer FIRST.IDA Kekuléstr. 7, 12489 Berlin, Germany {jek, blanker}@first.fraunhofer.de http://ida.first.fraunhofer.de
More informationTri-modal Human Body Segmentation
Tri-modal Human Body Segmentation Master of Science Thesis Cristina Palmero Cantariño Advisor: Sergio Escalera Guerrero February 6, 2014 Outline 1 Introduction 2 Tri-modal dataset 3 Proposed baseline 4
More informationA Deterministic Global Optimization Method for Variational Inference
A Deterministic Global Optimization Method for Variational Inference Hachem Saddiki Mathematics and Statistics University of Massachusetts, Amherst saddiki@math.umass.edu Andrew C. Trapp Operations and
More informationInference and Representation
Inference and Representation Rachel Hodos New York University Lecture 5, October 6, 2015 Rachel Hodos Lecture 5: Inference and Representation Today: Learning with hidden variables Outline: Unsupervised
More information( ) =cov X Y = W PRINCIPAL COMPONENT ANALYSIS. Eigenvectors of the covariance matrix are the principal components
Review Lecture 14 ! PRINCIPAL COMPONENT ANALYSIS Eigenvectors of the covariance matrix are the principal components 1. =cov X Top K principal components are the eigenvectors with K largest eigenvalues
More informationPractical 4: The Integrate & Fire neuron
Practical 4: The Integrate & Fire neuron 2014 version by Mark van Rossum 2018 version by Matthias Hennig and Theoklitos Amvrosiadis 16th October 2018 1 Introduction to MATLAB basics You can start MATLAB
More informationhuman vision: grouping k-means clustering graph-theoretic clustering Hough transform line fitting RANSAC
COS 429: COMPUTER VISON Segmentation human vision: grouping k-means clustering graph-theoretic clustering Hough transform line fitting RANSAC Reading: Chapters 14, 15 Some of the slides are credited to:
More informationA SURVEY ON CLUSTERING ALGORITHMS Ms. Kirti M. Patil 1 and Dr. Jagdish W. Bakal 2
Ms. Kirti M. Patil 1 and Dr. Jagdish W. Bakal 2 1 P.G. Scholar, Department of Computer Engineering, ARMIET, Mumbai University, India 2 Principal of, S.S.J.C.O.E, Mumbai University, India ABSTRACT Now a
More informationResearch on the New Image De-Noising Methodology Based on Neural Network and HMM-Hidden Markov Models
Research on the New Image De-Noising Methodology Based on Neural Network and HMM-Hidden Markov Models Wenzhun Huang 1, a and Xinxin Xie 1, b 1 School of Information Engineering, Xijing University, Xi an
More informationClustering. CS294 Practical Machine Learning Junming Yin 10/09/06
Clustering CS294 Practical Machine Learning Junming Yin 10/09/06 Outline Introduction Unsupervised learning What is clustering? Application Dissimilarity (similarity) of objects Clustering algorithm K-means,
More informationMachine Learning and Data Mining. Clustering (1): Basics. Kalev Kask
Machine Learning and Data Mining Clustering (1): Basics Kalev Kask Unsupervised learning Supervised learning Predict target value ( y ) given features ( x ) Unsupervised learning Understand patterns of
More informationSegmentation in electron microscopy images
Segmentation in electron microscopy images Aurelien Lucchi, Kevin Smith, Yunpeng Li Bohumil Maco, Graham Knott, Pascal Fua. http://cvlab.epfl.ch/research/medical/neurons/ Outline Automated Approach to
More informationALTERNATIVE METHODS FOR CLUSTERING
ALTERNATIVE METHODS FOR CLUSTERING K-Means Algorithm Termination conditions Several possibilities, e.g., A fixed number of iterations Objects partition unchanged Centroid positions don t change Convergence
More informationPattern recognition (3)
Pattern recognition (3) 1 Things we have discussed until now Statistical pattern recognition Building simple classifiers Supervised classification Minimum distance classifier Bayesian classifier Building
More informationFall 09, Homework 5
5-38 Fall 09, Homework 5 Due: Wednesday, November 8th, beginning of the class You can work in a group of up to two people. This group does not need to be the same group as for the other homeworks. You
More informationHomework 2: Search and Optimization
Scott Chow ROB 537: Learning Based Control October 16, 2017 Homework 2: Search and Optimization 1 Introduction The Traveling Salesman Problem is a well-explored problem that has been shown to be NP-Complete.
More informationMachine Learning. B. Unsupervised Learning B.1 Cluster Analysis. Lars Schmidt-Thieme, Nicolas Schilling
Machine Learning B. Unsupervised Learning B.1 Cluster Analysis Lars Schmidt-Thieme, Nicolas Schilling Information Systems and Machine Learning Lab (ISMLL) Institute for Computer Science University of Hildesheim,
More informationMachine Learning : Clustering, Self-Organizing Maps
Machine Learning Clustering, Self-Organizing Maps 12/12/2013 Machine Learning : Clustering, Self-Organizing Maps Clustering The task: partition a set of objects into meaningful subsets (clusters). The
More informationMore on Learning. Neural Nets Support Vectors Machines Unsupervised Learning (Clustering) K-Means Expectation-Maximization
More on Learning Neural Nets Support Vectors Machines Unsupervised Learning (Clustering) K-Means Expectation-Maximization Neural Net Learning Motivated by studies of the brain. A network of artificial
More informationBehavioral Data Mining. Lecture 18 Clustering
Behavioral Data Mining Lecture 18 Clustering Outline Why? Cluster quality K-means Spectral clustering Generative Models Rationale Given a set {X i } for i = 1,,n, a clustering is a partition of the X i
More informationMultiDimensional Signal Processing Master Degree in Ingegneria delle Telecomunicazioni A.A
MultiDimensional Signal Processing Master Degree in Ingegneria delle Telecomunicazioni A.A. 205-206 Pietro Guccione, PhD DEI - DIPARTIMENTO DI INGEGNERIA ELETTRICA E DELL INFORMAZIONE POLITECNICO DI BARI
More informationContent based Image Retrievals for Brain Related Diseases
Content based Image Retrievals for Brain Related Diseases T.V. Madhusudhana Rao Department of CSE, T.P.I.S.T., Bobbili, Andhra Pradesh, INDIA S. Pallam Setty Department of CS&SE, Andhra University, Visakhapatnam,
More informationK-Means Clustering. Sargur Srihari
K-Means Clustering Sargur srihari@cedar.buffalo.edu 1 Topics in Mixture Models and EM Mixture models K-means Clustering Mixtures of Gaussians Maximum Likelihood EM for Gaussian mistures EM Algorithm Gaussian
More informationChapter 7 UNSUPERVISED LEARNING TECHNIQUES FOR MAMMOGRAM CLASSIFICATION
UNSUPERVISED LEARNING TECHNIQUES FOR MAMMOGRAM CLASSIFICATION Supervised and unsupervised learning are the two prominent machine learning algorithms used in pattern recognition and classification. In this
More informationCLUSTERING. JELENA JOVANOVIĆ Web:
CLUSTERING JELENA JOVANOVIĆ Email: jeljov@gmail.com Web: http://jelenajovanovic.net OUTLINE What is clustering? Application domains K-Means clustering Understanding it through an example The K-Means algorithm
More informationNote Set 4: Finite Mixture Models and the EM Algorithm
Note Set 4: Finite Mixture Models and the EM Algorithm Padhraic Smyth, Department of Computer Science University of California, Irvine Finite Mixture Models A finite mixture model with K components, for
More informationMORPH-II: Feature Vector Documentation
MORPH-II: Feature Vector Documentation Troy P. Kling NSF-REU Site at UNC Wilmington, Summer 2017 1 MORPH-II Subsets Four different subsets of the MORPH-II database were selected for a wide range of purposes,
More informationSubspace Clustering with Global Dimension Minimization And Application to Motion Segmentation
Subspace Clustering with Global Dimension Minimization And Application to Motion Segmentation Bryan Poling University of Minnesota Joint work with Gilad Lerman University of Minnesota The Problem of Subspace
More informationThe EM Algorithm Lecture What's the Point? Maximum likelihood parameter estimates: One denition of the \best" knob settings. Often impossible to nd di
The EM Algorithm This lecture introduces an important statistical estimation algorithm known as the EM or \expectation-maximization" algorithm. It reviews the situations in which EM works well and its
More informationHard clustering. Each object is assigned to one and only one cluster. Hierarchical clustering is usually hard. Soft (fuzzy) clustering
An unsupervised machine learning problem Grouping a set of objects in such a way that objects in the same group (a cluster) are more similar (in some sense or another) to each other than to those in other
More informationA P300-speller based on event-related spectral perturbation (ERSP) Ming, D; An, X; Wan, B; Qi, H; Zhang, Z; Hu, Y
Title A P300-speller based on event-related spectral perturbation (ERSP) Author(s) Ming, D; An, X; Wan, B; Qi, H; Zhang, Z; Hu, Y Citation The 01 IEEE International Conference on Signal Processing, Communication
More informationMarkov Random Fields and Segmentation with Graph Cuts
Markov Random Fields and Segmentation with Graph Cuts Computer Vision Jia-Bin Huang, Virginia Tech Many slides from D. Hoiem Administrative stuffs Final project Proposal due Oct 27 (Thursday) HW 4 is out
More informationClustering. Image segmentation, document clustering, protein class discovery, compression
Clustering CS 444 Some material on these is slides borrowed from Andrew Moore's machine learning tutorials located at: Clustering The problem of grouping unlabeled data on the basis of similarity. A key
More informationCS 1675 Introduction to Machine Learning Lecture 18. Clustering. Clustering. Groups together similar instances in the data sample
CS 1675 Introduction to Machine Learning Lecture 18 Clustering Milos Hauskrecht milos@cs.pitt.edu 539 Sennott Square Clustering Groups together similar instances in the data sample Basic clustering problem:
More informationThe Curse of Dimensionality
The Curse of Dimensionality ACAS 2002 p1/66 Curse of Dimensionality The basic idea of the curse of dimensionality is that high dimensional data is difficult to work with for several reasons: Adding more
More information