Results 11 - 20 of 5,756

Recognition of visual activities and interactions by stochastic parsing

by Yuri A. Ivanov, Aaron F. Bobick - IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE , 2000
"... This paper describes a probabilistic syntactic approach to the detection and recognition of temporally extended activities and interactions between multiple agents. The fundamental idea is to divide the recognition problem into two levels. The lower level detections are performed using standard inde ..."
Abstract - Cited by 322 (8 self) - Add to MetaCart
in several experiments on gesture recognition and in video surveillance. In the surveillance application, we show how the system correctly interprets activities of multiple, interacting objects.

Detecting Moving Objects, Ghosts and Shadows in Video Streams

by Rita Cucchiara, Costantino Grana, Massimo Piccardi, Andrea Prati - IEEE Transactions on Pattern Analysis and Machine Intelligence , 2003
"... Abstract—Background subtraction methods are widely exploited for moving object detection in videos in many applications, such as traffic monitoring, human motion capture, and video surveillance. How to correctly and efficiently model and update the background model and how to deal with shadows are t ..."
Abstract - Cited by 248 (24 self) - Add to MetaCart
Abstract—Background subtraction methods are widely exploited for moving object detection in videos in many applications, such as traffic monitoring, human motion capture, and video surveillance. How to correctly and efficiently model and update the background model and how to deal with shadows

Unsupervised Learning of Image Manifolds by Semidefinite Programming

by Kilian Q. Weinberger , Lawrence K. Saul , 2004
"... Can we detect low dimensional structure in high dimensional data sets of images and video? The problem of dimensionality reduction arises often in computer vision and pattern recognition. In this paper, we propose a new solution to this problem based on semidefinite programming. Our algorithm can be ..."
Abstract - Cited by 270 (9 self) - Add to MetaCart
Can we detect low dimensional structure in high dimensional data sets of images and video? The problem of dimensionality reduction arises often in computer vision and pattern recognition. In this paper, we propose a new solution to this problem based on semidefinite programming. Our algorithm can

Video Surveillance in Hollywood Movies

by Dietmar Kammerer - Surveillance & Society , 2004
"... This paper examines the representations of CCTV in contemporary popular culture, namely Hollywood film from the perspective of culture and film studies. It starts from the observation that a growing number of Hollywood films are not only using (fake) CCTV images within their narrative, but are actua ..."
Abstract - Cited by 5 (0 self) - Add to MetaCart
, but are actually developing ‘rhetorics of surveillance’. Following the argument of Thomas Y. Levin, contemporary Hollywood film is increasingly fascinated with (the images of) video surveillance. This fascination can be explained with the use of ‘real time ’ and a shift from spatial to temporal indexicality

Privacy and Security in Video Surveillance

by Thomas Winkler , Bernhard Rinner , Thomas Winkler , Bernhard Rinner
"... Abstract Video surveillance systems are usually installed to increase the safety and security of people or property in the monitored areas. Typical threat scenarios are robbery, vandalism, shoplifting or terrorism. Other application scenarios are more intimate and private such as home monitoring or ..."
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Abstract Video surveillance systems are usually installed to increase the safety and security of people or property in the monitored areas. Typical threat scenarios are robbery, vandalism, shoplifting or terrorism. Other application scenarios are more intimate and private such as home monitoring

Machine recognition of human activities: A survey

by Pavan Turaga, Rama Chellappa, V. S. Subrahmanian, Octavian Udrea , 2008
"... The past decade has witnessed a rapid proliferation of video cameras in all walks of life and has resulted in a tremendous explosion of video content. Several applications such as content-based video annotation and retrieval, highlight extraction and video summarization require recognition of the a ..."
Abstract - Cited by 218 (0 self) - Add to MetaCart
of the activities occurring in the video. The analysis of human activities in videos is an area with increasingly important consequences from security and surveillance to entertainment and personal archiving. Several challenges at various levels of processing—robustness against errors in low-level processing, view

Distributed source coding for sensor networks

by Zixiang Xiong, Angelos D. Liveris, Samuel Cheng - In IEEE Signal Processing Magazine , 2004
"... n recent years, sensor research has been undergoing a quiet revolution, promising to have a significant impact throughout society that could quite possibly dwarf pre-vious milestones in the information revolution. MIT Technology Review ranked wireless sensor networks that con-sist of many tiny, low- ..."
Abstract - Cited by 224 (4 self) - Add to MetaCart
of temperature, pressure and vibration; or real-time area video surveillance). Thus they must operate under a set of unique constraints and requirements. For example, in contrast to many other wireless devices (e.g., cellular phones, PDAs, and laptops), in which energy can be recharged from time to time

Integration of Interpersonal Space and Shared Workspace: ClearBoard Design and Experiments

by Hiroshi Ishii, Minoru Kobayashi , Jonathan Grudin , 1993
"... We describe the evolution of the novel shared drawing medium ClearBoard which was designed to seamlessly integrate an interpersonal space and a shared workspace. ClearBoard permits coworkers in two locations to draw with color markers or with electronic pens and software tools while maintaining dire ..."
Abstract - Cited by 214 (3 self) - Add to MetaCart
direct eye contact and the ability to employ natural gestures. The ClearBoard design is based on the key metaphor of “talking through and drawing on a transparent glass window. ” We describe the evolution from ClearBoard- 1 (which enables shared video drawing) to ClearBoard-2 (which incorporates Team

Real-Time Internet Video Using Error Resilient Scalable Compression and TCP-Friendly Transport Protocol

by Wai-tian Tan, Avideh Zakhor , 1999
"... We introduce a point to point real-time video transmission scheme over the Internet combining a low-delay TCP-friendly transport protocol in conjunction with a novel compression method that is error resilient and bandwidth-scalable. Compressed video is packetized into individually decodable packets ..."
Abstract - Cited by 179 (9 self) - Add to MetaCart
We introduce a point to point real-time video transmission scheme over the Internet combining a low-delay TCP-friendly transport protocol in conjunction with a novel compression method that is error resilient and bandwidth-scalable. Compressed video is packetized into individually decodable packets

Path Detection in Video Surveillance

by Dimitrios Makris, Tim Ellis - Image and Vision Computing , 2002
"... This paper addresses the problem of automatically extracting frequently used pedestrian pathways from video sequences of natural outdoor scenes. Path models are learnt from the accumulation of trajectory data over long time periods, and can be used to augment the classification of subsequent track d ..."
Abstract - Cited by 55 (5 self) - Add to MetaCart
This paper addresses the problem of automatically extracting frequently used pedestrian pathways from video sequences of natural outdoor scenes. Path models are learnt from the accumulation of trajectory data over long time periods, and can be used to augment the classification of subsequent track
Results 11 - 20 of 5,756