Results 1 - 10 of 2,749

Learning realistic human actions from movies

by Ivan Laptev, Marcin Marszałek, Cordelia Schmid, Benjamin Rozenfeld - IN: CVPR. , 2008
"... The aim of this paper is to address recognition of natural human actions in diverse and realistic video settings. This challenging but important subject has mostly been ignored in the past due to several problems one of which is the lack of realistic and annotated video datasets. Our first contribut ..."
Abstract - Cited by 738 (48 self) - Add to MetaCart
-of-the-art results on the standard KTH action dataset by achieving 91.8 % accuracy. Given the inherent problem of noisy labels in automatic annotation, we particularly investigate and show high tolerance of our method to annotation errors in the training set. We finally apply the method to learning and classifying

Metrics for Action-labelled Quantitative Transition Systems

by Yuxin Deng, Tom Chothia, Catuscia Palamidessi, Jun Pang , 2005
"... This paper defines action-labelled quantitative transition systems as a general framework for combining qualitative and quantitative analysis. We define state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single state-metric ..."
Abstract - Cited by 25 (9 self) - Add to MetaCart
This paper defines action-labelled quantitative transition systems as a general framework for combining qualitative and quantitative analysis. We define state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single state

A calculus of mobile processes, I

by Robin Milner, et al. , 1992
"... We present the a-calculus, a calculus of communicating systems in which one can naturally express processes which have changing structure. Not only may the component agents of a system be arbitrarily linked, but a communication between neighbours may carry information which changes that linkage. The ..."
Abstract - Cited by 1184 (31 self) - Add to MetaCart
indexed by distinctions-i.e., assumptions of inequality among names. These theories are based upon a semantics in terms of a labeled transition system and a notion of strong bisimulation, both of which are expounded in detail in a companion paper. We also report briefly on work-in-progress based upon

Abstract Metrics for Action-labelled Quantitative Transition Systems 1

by Yuxin Deng A
"... This paper defines action-labelled quantitative transition systems as a general framework for combining qualitative and quantitative analysis. We define state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single state-metric ..."
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This paper defines action-labelled quantitative transition systems as a general framework for combining qualitative and quantitative analysis. We define state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single state

Weakly Supervised Action Labeling in Videos Under Ordering Constraints

by Piotr Bojanowski, Rémi Lajugie, Francis Bach, Ivan Laptev, Jean Ponce, Cordelia Schmid, Josef Sivic, École Normale Supérieure
"... Abstract. We are given a set of video clips, each one annotated with an ordered list of actions, such as “walk ” then “sit ” then “answer phone” extracted from, for example, the associated text script. We seek to temporally localize the individual actions in each clip as well as to learn a discrimin ..."
Abstract - Cited by 9 (1 self) - Add to MetaCart
discriminative classifier for each action. We formulate the problem as a weakly supervised temporal assignment with ordering constraints. Each video clip is divided into small time intervals and each time interval of each video clip is assigned one action label, while respecting the order in which the action

Q.: Active image labeling and its application to facial action labeling

by Lei Zhang, Yan Tong, Qiang Ji - ECCV 2008, Part II. LNCS , 2008
"... Abstract. For many tasks in computer vision, it is very important to produce the groundtruth data. At present, this is mostly done manually. Manual data labeling is labor-intensive and prone to the human errors. The training data it produces often lacks in both quantity and quality. Fully automatic ..."
Abstract - Cited by 5 (0 self) - Add to MetaCart
of the machine so that the reliable, accurate, and efficient data labeling can be achieved. We demonstrate the validity of the proposed framework for interactive labeling of facial action units. The proposed methodology, however, is not limited to labeling of facial action units. It can be easily extended

QAPL 2005 Preliminary Version Metrics for Action-labelled Quantitative Transition Systems 1

by Yuxin Deng A, Jun Pang C
"... Abstract This paper defines action-labelled quantitative transition systems as a general framework for combining qualitative and quantitative analysis. We define state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single sta ..."
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Abstract This paper defines action-labelled quantitative transition systems as a general framework for combining qualitative and quantitative analysis. We define state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single

QAPL 2005 Preliminary Version Metrics for Action-labelled Quantitative Transition Systems 1

by Yuxin Deng, Tom Chothia, Catuscia Palamidessi
"... This paper denes action-labelled quantitative transition systems as a general frame-work for combining qualitative and quantitative analysis. We dene state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single state-metric co ..."
Abstract - Add to MetaCart
This paper denes action-labelled quantitative transition systems as a general frame-work for combining qualitative and quantitative analysis. We dene state-metrics as a natural extension of bisimulation from non-quantitative systems to quantitative ones. We then prove that any single state

Using Relational Histogram Features and Action Labelled Data to Learn Preconditions for Means-End Actions

by Severin Fichtl, Dirk Kraft, Frank Guerin
"... Abstract — The outcome of many complex manipulation ac-tions is contingent on the spatial relationships among pairs of objects, e.g. if an object is “inside ” or “on top ” of another. Recognising these spatial relationships requires a vision system which can extract appropriate features from the vis ..."
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Abstract — The outcome of many complex manipulation ac-tions is contingent on the spatial relationships among pairs of objects, e.g. if an object is “inside ” or “on top ” of another. Recognising these spatial relationships requires a vision system which can extract appropriate features from

Some efficient solutions to the affine scheduling problem -- Part I One-dimensional Time

by Paul Feautrier , 1996
"... Programs and systems of recurrence equations may be represented as sets of actions which are to be executed subject to precedence constraints. In many cases, actions may be labelled by integral vectors in some iteration domain, and precedence constraints may be described by affine relations. A s ..."
Abstract - Cited by 266 (22 self) - Add to MetaCart
Programs and systems of recurrence equations may be represented as sets of actions which are to be executed subject to precedence constraints. In many cases, actions may be labelled by integral vectors in some iteration domain, and precedence constraints may be described by affine relations. A
Results 1 - 10 of 2,749