DocumentCode :
3319341
Title :
Dynamic selection of a feature-rich query frame for mobile video retrieval
Author :
Chen, David ; Cheung, Ngai-Man ; Tsai, Sam ; Chandrasekhar, Vijay ; Takacs, Gabriel ; Vedantham, Ramakrishna ; Grzeszczuk, Radek ; Girod, Bernd
Author_Institution :
Inf. Syst. Lab., Stanford, CA, USA
fYear :
2010
fDate :
26-29 Sept. 2010
Firstpage :
1017
Lastpage :
1020
Abstract :
In this paper, we focus on a new application of mobile visual search: snapping a photo with a mobile device of a video playing on a TV screen to automatically retrieve and stream the remainder of the video to the mobile device. When the user takes a photo of the video, the captured query frame may contain too few useful features for good retrieval performance. We design and implement a new algorithm for mobile video retrieval to accurately select a feature-rich frame from a sequence of viewfinder frames in a very short temporal window determined by the user-initiated query event. Fast and accurate selection using efficiently computed Hessian scores is developed for real-time operation on mobile devices. Viewfinder frames captured before the query starts are pre-processed, while the number of viewfinder frames captured afterwards is minimized by a probabilistic optimization process. Evaluated on a large video database of 10 million frames, dynamic query frame selection provides a substantial increase in retrieval accuracy with very low search latency.
Keywords :
mobile radio; optimisation; probability; query processing; video databases; video retrieval; video streaming; TV screen; dynamic query frame selection; feature rich query frame; mobile video retrieval; probabilistic optimization process; video database; video streaming; Databases; Heuristic algorithms; Mobile communication; Mobile handsets; Streaming media; TV; Visualization; Mobile Visual Search; Query Frame Selection; Video Retrieval; Visual Bookmark;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Image Processing (ICIP), 2010 17th IEEE International Conference on
Conference_Location :
Hong Kong
ISSN :
1522-4880
Print_ISBN :
978-1-4244-7992-4
Electronic_ISBN :
1522-4880
Type :
conf
DOI :
10.1109/ICIP.2010.5650653
Filename :
5650653
Link To Document :
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