Parameterized modeling and recognition of activities
Computer Vision and Image Understanding
An Object-Oriented Conceptual Modeling of Video Data
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
Visual Surveillance of Human Activity
ACCV '98 Proceedings of the Third Asian Conference on Computer Vision-Volume II
Video Indexing Using MPEG Motion Compensation Vectors
ICMCS '99 Proceedings of the IEEE International Conference on Multimedia Computing and Systems - Volume 2
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Recognition of Group Activities using Dynamic Probabilistic Networks
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Recognizing Action at a Distance
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Scale & Affine Invariant Interest Point Detectors
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Distinctive Image Features from Scale-Invariant Keypoints
International Journal of Computer Vision
Detecting Rare Events in Video Using Semantic Primitives with HMM
ICPR '04 Proceedings of the Pattern Recognition, 17th International Conference on (ICPR'04) Volume 4 - Volume 04
Space-Time Behavior Based Correlation
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01
Semi-Supervised Adapted HMMs for Unusual Event Detection
CVPR '05 Proceedings of the 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05) - Volume 1 - Volume 01
Efficient Visual Event Detection Using Volumetric Features
ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1 - Volume 01
Detecting Irregularities in Images and in Video
ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1 - Volume 01
The Function Space of an Activity
CVPR '06 Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 1
Statistical Analysis of Dynamic Actions
IEEE Transactions on Pattern Analysis and Machine Intelligence
Classification of video events using 4-dimensional time-compressed motion features
Proceedings of the 6th ACM international conference on Image and video retrieval
Towards optimal bag-of-features for object categorization and semantic video retrieval
Proceedings of the 6th ACM international conference on Image and video retrieval
Motion pattern-based video classification and retrieval
EURASIP Journal on Applied Signal Processing
Bag-of-visual-words expansion using visual relatedness for video indexing
Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval
Detecting unusual activity in video
CVPR'04 Proceedings of the 2004 IEEE computer society conference on Computer vision and pattern recognition
EMD-based video clip retrieval by many-to-many matching
CIVR'05 Proceedings of the 4th international conference on Image and Video Retrieval
Video Event Classification Using Bag of Words and String Kernels
ICIAP '09 Proceedings of the 15th International Conference on Image Analysis and Processing
Descriptive visual words and visual phrases for image applications
MM '09 Proceedings of the 17th ACM international conference on Multimedia
MM '09 Proceedings of the 17th ACM international conference on Multimedia
Localizing volumetric motion for action recognition in realistic videos
MM '09 Proceedings of the 17th ACM international conference on Multimedia
Using cross-media correlation for scene detection in travel videos
Proceedings of the ACM International Conference on Image and Video Retrieval
Recognition of Semantic Basketball Events Based on Optical Flow Patterns
ISVC '09 Proceedings of the 5th International Symposium on Advances in Visual Computing: Part II
Motion region-based trajectory analysis and re-ranking for video retrieval
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Journal of Visual Communication and Image Representation
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Discriminative codeword selection for image representation
Proceedings of the international conference on Multimedia
Building contextual visual vocabulary for large-scale image applications
Proceedings of the international conference on Multimedia
Event detection and recognition for semantic annotation of video
Multimedia Tools and Applications
Personalization in multimedia retrieval: A survey
Multimedia Tools and Applications
Building descriptive and discriminative visual codebook for large-scale image applications
Multimedia Tools and Applications
Modeling spatial and semantic cues for large-scale near-duplicated image retrieval
Computer Vision and Image Understanding
Top-down cues for event recognition
ACCV'10 Proceedings of the 10th Asian conference on Computer vision - Volume Part III
Words-of-interest selection based on temporal motion coherence for video retrieval
Proceedings of the 34th international ACM SIGIR conference on Research and development in Information Retrieval
Trajectories based descriptor for dynamic events annotation
J-MRE '11 Proceedings of the 2011 joint ACM workshop on Modeling and representing events
AIEMPro '11 Proceedings of the 2011 ACM international workshop on Automated media analysis and production for novel TV services
Semantic concept detection for user-generated video content using a refined image folksonomy
MMM'10 Proceedings of the 16th international conference on Advances in Multimedia Modeling
Extracting representative motion flows for effective video retrieval
Multimedia Tools and Applications
Knowledge adaptation for ad hoc multimedia event detection with few exemplars
Proceedings of the 20th ACM international conference on Multimedia
Improving bag-of-visual-words model with spatial-temporal correlation for video retrieval
Proceedings of the 21st ACM international conference on Information and knowledge management
Trajectory-Based modeling of human actions with motion reference points
ECCV'12 Proceedings of the 12th European conference on Computer Vision - Volume Part V
Reordering video shots for event classification using bag-of-words models and string kernels
Proceedings of the 27th Conference on Image and Vision Computing New Zealand
We are not equally negative: fine-grained labeling for multimedia event detection
Proceedings of the 21st ACM international conference on Multimedia
A rule-based event detection system for real-life underwater domain
Machine Vision and Applications
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Event detection plays an essential role in video content analysis. However, the existing features are still weak in event detection because: i) most features just capture what is involved in an event or how the event evolves separately, and thus cannot completely describe the event; ii) to capture event evolution information, only motion distribution over the whole frame is used which proves to be noisy in unconstrained videos; iii) the estimated object motion is usually distorted by camera movement. To cope with these problems, in this paper, we propose a new motion feature, namely Expanded Relative Motion Histogram of Bag-of-Visual-Words (ERMH-BoW) to employ motion relativity and visual relatedness for event detection. In ERMH-BoW, by representing what aspect of an event with Bag-of-Visual-Words (BoW), we construct relative motion histograms between visual words to depict the object activities or how aspect of the event. ERMH-BoW thus integrates both what and how aspects for a complete event description. Instead of motion distribution features, local motion of visual words is employed which is more discriminative in event detection. Meanwhile, we show that by employing relative motion, ERMH-BoW is able to honestly describe object activities in an event regardless of varying camera movement. Besides, to alleviate the visual word correlation problem in BoW, we propose a novel method to expand the relative motion histogram. The expansion is achieved by diffusing the relative motion among correlated visual words measured by visual relatedness. To validate the effectiveness of the proposed feature, ERMH-BoW is used to measure video clip similarity with Earth Mover's Distance (EMD) for event detection. We conduct experiments for detecting LSCOM events in TRECVID 2005 video corpus, and performance is improved by 74% and 24% compared with existing motion distribution feature and BoW feature respectively.