Informedia@trecvid 201 4 Med and Mer Med System
نویسندگان
چکیده
We report on our system used in the TRECVID 2014 Multimedia Event Detection (MED) and Multimedia Event Recounting (MER) tasks. On the MED task, the CMU team achieved leading performance in the Semantic Query (SQ), 000Ex, 010Ex and 100Ex settings. Furthermore, SQ and 000Ex runs are significantly better than the submissions from the other teams. We attribute the good performance to 4 main components: 1) large-scale semantic concept detectors trained on video shots for SQ/000Ex systems, 2) better features such as improved trajectories and deep learning features for 010Ex/100Ex systems, 3) a novel Multistage Hybrid Late Fusion method for 010Ex/100Ex systems and 4) improved reranking methods for Pseudo Relevance Feedback for 000Ex/010Ex systems. On the MER task, our system utilizes a subset of features and detection results from the MED system from which the recounting is then generated. Recounting evidence is presented by selecting the most likely concepts detected in the salient shots of a video. Salient shots are detected by searching for shots which have high response when predicted by the video level event detector.
منابع مشابه
Informedia E-Lamp @ TRECVID 2013: Multimedia Event Detection and Recounting (MED and MER)
We report on our system used in the TRECVID 2013 Multimedia Event Detection (MED) and Multimedia Event Recounting (MER) tasks. For MED, it consists of four main steps: extracting features, representing features, training detectors and fusion. In the feature extraction part, we extract more than 10 low-level, high-level, and text features. Those features are then represented in three different w...
متن کاملTRECVID 2012 GENIE: Multimedia Event Detection and Recounting
Our MED 12 system is an extension of our MED 11 system [11], and consists of a collection of lowlevel and high-level features, feature-specific classifiers built upon those features, and a fusion system that combines features both through mid-level kernel fusion and score fusion. We have incorporated large number of audio-visual features in our new system and incorporated diverse types of stand...
متن کاملTRECVID 2013 GENIE: Multimedia Event Detection and Recounting
Our MED 13 system is an extension of our MED 12 system [12, 13], and consists of a collection of lowlevel and high-level features, feature-specific classifiers built upon those features, and a fusion system that combines features both through mid-level kernel fusion and late fusion. Our MED submissions include total of 24 different configurations which consist of combinations of 2 submission ti...
متن کاملTRECVid 2012 Experiments at Dublin City University
Following previous participations in TRECVid, this year, the DCU-IAD team participated in four tasks of TRECVid 2012: Instance Search (INS), Interactive Known-Item Search (KIS), Multimedia Event Detection (MED) and Multimedia Event Recounting (MER).
متن کاملSRI-Sarnoff AURORA System at TRECVID 2012 Multimedia Event Detection and Recounting
In this paper, we describe the evaluation results for TRECVID 2012 Multimedia Event Detection (MED) and Multimedia Event Recounting (MER) tasks as a part of SRI-Sarnoff AURORA system that is developed under the IARPA ALDDIN program. In AURORA system, we incorporated various low-level features that capture color, appearance, motion, and audio information in videos. Based on these low-level featu...
متن کامل