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Author
David Sanchez-Mendoza; David Masip; Agata Lapedriza
Title
Emotion recognition from mid-level features
Type
Journal Article
Year
2015
Publication
Pattern Recognition Letters
Abbreviated Journal
PRL
Volume
67
Issue
Part 1
Pages
66–74
Keywords
Facial expression; Emotion recognition; Action units; Computer vision
Abstract
In this paper we present a study on the use of Action Units as mid-level features for automatically recognizing basic and subtle emotions. We propose a representation model based on mid-level facial muscular movement features. We encode these movements dynamically using the Facial Action Coding System, and propose to use these intermediate features based on Action Units (AUs) to classify emotions. AUs activations are detected fusing a set of spatiotemporal geometric and appearance features. The algorithm is validated in two applications: (i) the recognition of 7 basic emotions using the publicly available Cohn-Kanade database, and (ii) the inference of subtle emotional cues in the Newscast database. In this second scenario, we consider emotions that are perceived cumulatively in longer periods of time. In particular, we Automatically classify whether video shoots from public News TV channels refer to Good or Bad news. To deal with the different video lengths we propose a Histogram of Action Units and compute it using a sliding window strategy on the frame sequences. Our approach achieves accuracies close to human perception.
Address
Corporate Author
Thesis
Publisher
Elsevier B.V.
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0167-8655
ISBN
Medium
Area
Expedition
Conference
Notes
OR;MV
Approved
no
Call Number
Admin @ si @ SML2015
Serial
2746
Permanent link to this record
Author
David Guillamet; Jordi Vitria
Title
Evaluation of distance metrics for recognition based on non-negative matrix factorization
Type
Journal Article
Year
2003
Publication
Pattern Recognition Letters
Abbreviated Journal
PRL
Volume
24
Issue
9-10
Pages
1599 –1605
Keywords
Abstract
IF: 0.809
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
OR;MV
Approved
no
Call Number
BCNPCL @ bcnpcl @ GuV2003b
Serial
380
Permanent link to this record
Author
A. Martinez; Jordi Vitria
Title
Learning mixture models using a genetic version of the EM algorithm.
Type
Journal Article
Year
2000
Publication
Pattern Recognition Letters
Abbreviated Journal
PRL
Volume
21
Issue
8
Pages
759–769
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
OR;MV
Approved
no
Call Number
BCNPCL @ bcnpcl @ MVi2000
Serial
335
Permanent link to this record
Author
Bogdan Raducanu; Jordi Vitria
Title
Learning to Learn: From Smarts Machines to Intelligent Machines
Type
Journal
Year
2008
Publication
Patter Recognition Letters
Abbreviated Journal
PRL
Volume
29
Issue
8
Pages
1024–1032
Keywords
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
OR;MV
Approved
no
Call Number
BCNPCL @ bcnpcl @ RaV2008a
Serial
950
Permanent link to this record
Author
Mario Rojas; David Masip; A. Todorov; Jordi Vitria
Title
Automatic Prediction of Facial Trait Judgments: Appearance vs. Structural Models
Type
Journal Article
Year
2011
Publication
PloS one
Abbreviated Journal
Plos
Volume
6
Issue
8
Pages
e23323
Keywords
Abstract
JCR Impact Factor 2010: 4.411
Evaluating other individuals with respect to personality characteristics plays a crucial role in human relations and it is the focus of attention for research in diverse fields such as psychology and interactive computer systems. In psychology, face perception has been recognized as a key component of this evaluation system. Multiple studies suggest that observers use face information to infer personality characteristics. Interactive computer systems are trying to take advantage of these findings and apply them to increase the natural aspect of interaction and to improve the performance of interactive computer systems. Here, we experimentally test whether the automatic prediction of facial trait judgments (e.g. dominance) can be made by using the full appearance information of the face and whether a reduced representation of its structure is sufficient. We evaluate two separate approaches: a holistic representation model using the facial appearance information and a structural model constructed from the relations among facial salient points. State of the art machine learning methods are applied to a) derive a facial trait judgment model from training data and b) predict a facial trait value for any face. Furthermore, we address the issue of whether there are specific structural relations among facial points that predict perception of facial traits. Experimental results over a set of labeled data (9 different trait evaluations) and classification rules (4 rules) suggest that a) prediction of perception of facial traits is learnable by both holistic and structural approaches; b) the most reliable prediction of facial trait judgments is obtained by certain type of holistic descriptions of the face appearance; and c) for some traits such as attractiveness and extroversion, there are relationships between specific structural features and social perceptions
Address
Corporate Author
Thesis
Publisher
Public Library of Science
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
OR;MV
Approved
no
Call Number
Admin @ si @ RMT2011
Serial
1883
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