THUMOS’13 Action Recognition with aLarge Number of Classes

Thumos (θυμός)

Greek word expressing "spiritedness” (as in spirited contest).The word is also used to express the human desire for recognition.

Organizers

• THUMOS challenge organizers + program chairs(who did the hard work)– Yu-Gang Jiang, Fudan University– Jingen Liu, SRI International– Amir Roshan Zamir, UCF

• General chairs– Mubarak Shah, UCF– Massimo Piccardi, Univ. Tech. Sydney– Ivan Laptev, INRIA– Rahul Sukthankar, Google Research

(Pre-)History

• KTH (2004)6 actions

• Weizmann (2005)10 actions

• CMU detection (2007)5 actions in clutter

Recognition in “Real” Videos

• Drinking & Smoking (2007)2 actions in movies

• Hollywood (2008)8 “everyday” actions

• UCF Sports (2008)9 “sports” in BBC, ESPN,…[S. Ali, M. Rodriguez,A. Tanveer, S. Aziz]

Action Recognition in YouTube Videos

• UCF 11 (2009)[Jingen Liu]

• UCF 50 (2010)[Kishore Reddy]

Current “Large Class” Datasets

• HMDB (2011)51 actions

• UCF101 (2012)101 actions[K. Soomro & A. Zamir]

THUMOS Contest Results OverviewRank Submission Overall Accuracy1 ID39_INRIA 85.900%2 ID40_Florence 85.708%3 ID35_Canberra 85.437%4 ID38_CAS_SIAT 84.164%5 ID25_Nanjing 83.979%6 ID34_UCF_BoyrazTappen 82.829%7 ID36_UCSD_MSRA_SJTU 80.895%8 ID28_USC 77.360%9 ID31_NII 73.389%10 ID44-UNITN 70.504%11 ID42-UEC 66.261%12 ID26_UMD 65.948%13 ID47_UNAL 65.675%14 ID32_Buffalo 64.296%15 ID29_TNO 63.457%16 ID37_ECNU 54.738%

Workshop Schedule

Morning [09:00-12:40]

• Opening Session– Invited talk: C. Schmid– Invited talk: J. Corso

• Action Classification– Overview: J. Liu– Karaman et al.– Peng et al.– Invited talk: S. Savarese– Oruganti et al.– Yanai et al.

Afternoon [14:30-17:00]

• Detection– Overview: Y.-G. Jiang– Invited talk: J. Wu

• Future– Invited talk: T. Hassner– Closing remarks: M. Piccardi– Open discussion

[your name here!]

[THUMOS top performers]