Algorithm 457: finding all cliques of an undirected graph
Communications of the ACM
Shape Matching and Object Recognition Using Shape Contexts
IEEE Transactions on Pattern Analysis and Machine Intelligence
Video Google: A Text Retrieval Approach to Object Matching in Videos
ICCV '03 Proceedings of the Ninth IEEE International Conference on Computer Vision - Volume 2
Distinctive Image Features from Scale-Invariant Keypoints
International Journal of Computer Vision
Scalable Recognition with a Vocabulary Tree
CVPR '06 Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 2
Spatial coding for large scale partial-duplicate web image search
Proceedings of the international conference on Multimedia
MM '11 Proceedings of the 19th ACM international conference on Multimedia
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Picture-in-Picture (PiP) is a special video transformation where one or more videos is scaled and spatially embedded in a host video. PiP is a very useful service to watch two or more videos simultaneously, however it can be exploited to visually hide one video inside another video. Today's copy detection techniques can be easily fooled by PiP, which is reflected in the poor results in the yearly TRECVID competitions. Inspired by the promise of spatial coding in partial image matching, we propose a generalized spatial coding representation in which both the relative position and relative orientation is embedded in the spatial code. In this paper, we will provide novel formulation for spatial verification problem and introduce polynomial and non-polynomial algorithms to efficiently address the spatial verification problem. Our initial experiment results on TRECVID and MSRA datasets shows that our proposed spatial verification algorithms provide around 20% improvement over the classical hierarchical bag-of-words approach.