Indoor physical security, as a perpetual and multi-layered phenomenon, is a timeintensive and labor-consuming task. Various technologies have been leveraged to develop automatic access control, intrusion detection, or video monitoring systems. Video surveillance has been significantly enhanced by the advent of Pan-Tilt-Zoom (PTZ) cameras and advanced video processing, which together enable effe...

The Video Surveillance and Monitoring (VSAM) team at Carnegie Mellon University (CMU) has developed an end-to-end, multicamera surveillance system that allows a single human operator to monitor activities in a cluttered environment using a distributed network of active video sensors. Video understanding algorithms have been developed to automatically detect people and vehicles, seamlessly track...

The Remote Console (ReCon) telerehabilitation system provides a platform for therapists to guide rehabilitation sessions from a remote location. The ReCon system integrates real-time graphics, audio/video communication, private therapist chat, post-test data graphs, extendable patient and exercise performance monitoring, exercise pre-configuration and modification under a single application. Th...

Scalable video coding (SVC) is an extension of H.264/AVC for providing three types of scalabilities: temporal, spatial, and quality. These scalabilities can be combined to make use of network bandwidth. As an extension of the H.264/AVC video standard, an inter-mode prediction technique is used for reducing temporal as well as spatial redundancies by using seven variable-sized macroblocks (MBs) ...

This paper presents the graphical analysis of selection traces in matrix-factorization space of multimedia items. A trace consists of links (lines) between points that present a selected item during interaction between user and video-ondemand (VoD) system. User used gestures to select from among video on screen (VoD service), while additional user-produced social signal (SS) information was use...

An optimum representative-frames (r-frames) selection method using step-wise function approximation has been developed to provide automatic indexing for a video-queryagent (VQA) system. It uses dynamic programming to simultaneously select the r-frames and corresponding segment boundaries. Experiments showed that the approximation error of the selected r-frames was less than that of two conventi...

This paper describes queue monitoring, a policy for managing the effect of delay jitter on audio and video in computer-based conferences. By observing delay jitter over time, this policy dynamically adjusts display latency in order to support low-latency conferences with an acceptable gap rate. Queue monitoring is evaluated by comparing it with two other policies in an empirical study of a comp...

This paper presents camera network research in the context of a unique synthesis of advanced computer graphics and vision simulation technologies. In particular, we propose the design of and experimentation with simulated camera networks within visually and behaviorally realistic virtual environments. Specifically, we demonstrate a smart camera network comprising static and active simulated vid...