Probabilistic reasoning in intelligent systems: networks of plausible inference
Probabilistic reasoning in intelligent systems: networks of plausible inference
Cooling schedules for optimal annealing
Mathematics of Operations Research
Machine Learning - Special issue on learning with probabilistic representations
Probabilistic modeling for face orientation discrimination: learning from labeled and unlabeled data
Proceedings of the 1998 conference on Advances in neural information processing systems II
Text Classification from Labeled and Unlabeled Documents using EM
Machine Learning - Special issue on information retrieval
Automatic Analysis of Facial Expressions: The State of the Art
IEEE Transactions on Pattern Analysis and Machine Intelligence
Unlabeled Data Can Degrade Classification Performance of Generative Classifiers
Proceedings of the Fifteenth International Florida Artificial Intelligence Research Society Conference
Connected Vibrations: A Modal Analysis Approach for Non-Rigid Motion Tracking
CVPR '98 Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition
Comprehensive Database for Facial Expression Analysis
FG '00 Proceedings of the Fourth IEEE International Conference on Automatic Face and Gesture Recognition 2000
The relative value of labeled and unlabeled samples in pattern recognition
The relative value of labeled and unlabeled samples in pattern recognition
Joint processing of audio-visual information for the recognition of emotional expressions in human-computer interaction
Facial expression recognition from video sequences: temporal and static modeling
Computer Vision and Image Understanding - Special issue on Face recognition
Semantic video classification and feature subset selection under context and concept uncertainty
Proceedings of the 4th ACM/IEEE-CS joint conference on Digital libraries
Task oriented facial behavior recognition with selective sensing
Computer Vision and Image Understanding
An ensemble-driven k-NN approach to ill-posed classification problems
Pattern Recognition Letters - Special issue: Pattern recognition in remote sensing (PRRS 2004)
Expression recognition using fuzzy spatio-temporal modeling
Pattern Recognition
Static topographic modeling for facial expression recognition and analysis
Computer Vision and Image Understanding
International Journal of Approximate Reasoning
A robust multimodal approach for emotion recognition
Neurocomputing
Integrated Computer-Aided Engineering
Supporting Ubiquitous Collaboration with Real-Time Facial Animation
Computer Supported Cooperative Work in Design IV
Task oriented facial behavior recognition with selective sensing
Computer Vision and Image Understanding
A Bayesian approach to recognise facial expressions using vector flows
CompSysTech '09 Proceedings of the International Conference on Computer Systems and Technologies and Workshop for PhD Students in Computing
ISVC'07 Proceedings of the 3rd international conference on Advances in visual computing - Volume Part I
Modeling naturalistic affective states via facial, vocal, and bodily expressions recognition
ICMI'06/IJCAI'07 Proceedings of the ICMI 2006 and IJCAI 2007 international conference on Artifical intelligence for human computing
Audio-visual based emotion recognition-a new approach
CVPR'04 Proceedings of the 2004 IEEE computer society conference on Computer vision and pattern recognition
ISVC'11 Proceedings of the 7th international conference on Advances in visual computing - Volume Part I
Gabor feature based face recognition using supervised locality preserving projection
ACIVS'06 Proceedings of the 8th international conference on Advanced Concepts For Intelligent Vision Systems
Sketch based facial expression recognition using graphics hardware
ACII'05 Proceedings of the First international conference on Affective Computing and Intelligent Interaction
Facial expression recognition using HLAC features and WPCA
ACII'05 Proceedings of the First international conference on Affective Computing and Intelligent Interaction
EigenExpress approach in recognition of facial expression using GPU
ECCV'06 Proceedings of the 2006 international conference on Computer Vision in Human-Computer Interaction
Automatic facial expression recognition based on spatiotemporal descriptors
Pattern Recognition Letters
Enhancing expression recognition in the wild with unlabeled reference data
ACCV'12 Proceedings of the 11th Asian conference on Computer Vision - Volume Part II
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Understanding human emotions is one of the necessary skills for the computer to interact intelligently with human users. The most expressive way humans display emotions is through facial expressions. In this paper, we report on several advances we have made in building a system for classification of facial expressions from continuous video input. We use Bayesian network classifiers for classifying expressions from video. One of the motivating factor in using the Bayesian network classifiers is their ability to handle missing data, both during inference and training. In particular, we are interested in the problem of learning with both labeled and unlabeled data. We show that when using unlabeled data to learn classifiers, using correct modeling assumptions is critical for achieving improved classification performance. Motivated by this, we introduce a classification driven stochastic structure search algorithm for learning the structure of Bayesian network classifiers. We show that with moderate size labeled training sets and large amount of unlabeled data, our method can utilize unlabeled data to improve classification performance. We also provide results using the Naive Bayes (NB) and the Tree-Augmented Naive Bayes (TAN) classifiers, showing that the two can achieve good performance with labeled training sets, but perform poorly when unlabeled data are added to the training set.