Karthik Venkatraman

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3D collaborative Tele-Immersive environments allow reconstruction of real world 3D scenes in the virtual world across multiple physical locations. This kind of reconstruction results in a lot of 3D data being transmitted over the internet in real time. The current systems allow for transmission at low frame rates due to the large volume of data and network(More)
We present an immersive gaming demonstration using the minimum amount of wearable sensors. The game demonstrated is two-player tennis. We combine a virtual environment with real 3D representations of physical objects like the players and the tennis racquet (if available). The main objective of the game is to provide as real an experience of tennis as(More)
Generally, the extended Kalman filter (EKF) is used for sensor fusion in a land vehicle navigation system. However, defects of the first-order linearization of the nonlinear model in the EKF can introduce large estimated errors, and may lead to sub-optimal performance. In order to yield higher accuracy of navigation, in this paper, a novel particle filter(More)
Wireless Sensor Networks are mostly used for their monitoring applications In these applications, the network captures the environment and searches for occurrences of events by sensing different physical properties, such as temperature, humidity, pressure,ambient light, and movement. Location in time and space is a paramount issue and nodes are usually(More)
3D Tele-Immersion (3DTI) environments are emerging as a new medium for human interactions and collaborations in the areas of education, sports training, physical medicine and rehabilitation. By adding a tactile element to a visually centered 3DTI environment, such applications can be made even more engaging. But it also opens up a few challenges in terms of(More)
3D Tele-Immersion (3DTI) environments are a new medium for highly interactive and immersive means of collaborations through a shared virtual 3D environment. They have many applications in the areas of education, entertainment, sports training, tele-medicine etc. The data in these systems are multi-modal, some high volume, some high frequency and all highly(More)
A collaborative 3D Tele-immersion (3DTI) system consists of multiple sensor devices sending streams of data to and from each other. We consider the data streams produced from Microsoft Kinect cameras here. A single camera produces large volumes of data every second. A large bandwidth and low network delay is required to support the streaming of large(More)
Collaborative 3D Tele-immersive (3DTI) environments allow reconstruction of real world 3D scenes in the virtual world across multiple physical locations. This kind of reconstruction results in a lot of 3D data being transmitted over the internet in real time. The current systems allow for transmission at low frame rates due to the large volume of data and(More)
Smart antennas can be useful in significantly increasing the capacity of wireless ad hoc networks. A number of media access and routing protocols have been recently proposed for the use with such antennas, and have shown significant performance improvements over the omnidirectional case. However, none of these works explores if and how different directional(More)
Augmented Reality (AR) and Augmented Virtuality (AV) systems have been used in various fields such as entertainment, broadcasting, gaming [1], etc. Collaborative AR or AV (CAR/CAV) systems are a special kind of such system in which the interaction happens through the exchange of multi-modal data between multiple users/sites. Multiple sensors capture the(More)