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Photo-sharing social media sites provide new ways for users to share their experiences and interests on the Web, which aggregate large amounts of multimedia resources associated with a wide variety of real-world events in different types and scales. In this work, we aim to tackle social event detection from these large amounts of image collections by devising a semi-supervised multimodal clustering...
In this paper, a novel patch-based (PB) framework is proposed for detecting abnormal activities using a Pan-Tilt-Zoom (PTZ) camera. We first propose a new scene-patch-based (SSB) algorithm which can efficiently extract the target object's global trajectory from the PTZ camera. Furthermore, we propose an extended network-based (ENB) algorithm for detecting abnormal activities. The proposed ENB algorithm...
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