Informedia@TrecVID 2014: MED and MER

Shoou-I Yu, Lu Jiang, Zhongwen Xu, Zhenzhong Lan, Shicheng Xu, Xiaojun Chang, Xuanchong Li, Zexi Mao, Chuang Gan, Yajie Miao, Xingzhong Du, Yang Cai, Lara Martin, Nikolas Wolfe, Anurag Kumar, Huan Li, Ming Lin, Zhigang Ma, Yi Yang, Deyu MengShiguang Shan, Pinar Duygulu Sahin, Susanne Burger, Florian Metze, Rita Singh, Bhiksha Raj, Teruko Mitamura, Richard A. Stern, Alexander G. Hauptmann

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


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.
Original languageEnglish
Title of host publicationTRECVID 2014
EditorsPaul Over
Place of PublicationSaarbrücken/Wadern Germany
PublisherLIPIcsSchloss Dagstuhl – Leibniz Center for Informatics
Number of pages14
Publication statusPublished - 2014
Externally publishedYes
EventTREC Video Retrieval Evaluation 2014 - Orlando, United States of America
Duration: 10 Nov 201412 Nov 2014 (Proceedings) (Website)


ConferenceTREC Video Retrieval Evaluation 2014
Abbreviated titleTRECVID 2014
CountryUnited States of America
Internet address

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