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Today, talks, presentations, and lectures are often captured on video to give a broad audience the possibility to (re-)access the content. As presenters are often moving around during a talk it is necessary to guide recording cameras. We present an automatic solution for user tracking and camera control. It uses a depth camera for user tracking, and a scalable networking architecture based on publish/subscribe...
With increasing economic globalization and workforcemobilization, there is a strong need for research anddevelopment of advanced infrastructures and tools to bringimmersive experience into telecommunication so people acrossgeographically distributed sites can interact collaboratively ina natural way. This requires deep understanding of multipledisciplines. In particular, computer vision, graphics...
Consumer depth cameras such as Kinect are gaining huge popularity due to their potential to real-time 3D surface reconstruction. The creation of tractable 3D object models from the reconstructed surface model, however, requires further processings for segmentation, mesh/texture generation, and skeletal rigging. Providing solutions for all these issues, this paper formulate a comprehensive framework...
In this paper, we propose a DigiLog space that combines physical real world and its mirrored world to realize a 4D+ augmented reality. To support this, a RGB-D-based feature map is designed which is robust to lighting changes and enables texture-less object detection and tracking. Then we suggest a real-time context of interest (CoI) registration method for dynamic augmented reality (AR) information...
As a certain case in the domain of human actions, hand gestures can be expressed by the motion of user's hand to provide nature interaction in many applications. In this paper we proposed a real-time hand gesture recognition system based on robust hand tracking from depth image sequences. Using hidden markov models (HMM) with varying states, gesture models are trained online along with user's feedback,...
Several studies have proved the efficacy of computer assistance in spinal surgery, especially in the technique of pedicle screw insertion for vertebral fusion and correction of deformities. Computer assisted surgical navigation systems have proven success in the surgical treatment of spinal fractures and disorders. We have developed a novel method for real time computer assisted spinal surgery, based...
Every year many vehicle departure accidents happen due to the driver's carelessness. Lane Departure Warning System (LDWS) is a kind of system which can relieve the stress of the drivers and reduce traffic accidents. But most traffic scenes have greater dynamic range than the digital camera at present. It makes the accuracy of the system would be affected by the complicated lighting. Traditional lane...
A visual-based auxiliary navigation method using augmented reality is an immersive navigation interface with virtual navigation and decision-making information superimposed on the video of real environment. It can provide the operator with more information to behave proactively in order to forestall future problems, with less stress or effort, and to increase the successful rate of UAV missions. The...
In the application of 3D interactive narratives, virtual camera is a crucial element for appropriate presentation of scenarios happening dynamically. In this work, we have designed a virtual cinematographic system to generate appropriate camera plans automatically in a 3D virtual environment for interactive storytelling. In such a system, not only the story line but also the relative positions between...
A technique to create High Dynamic Range (HDR) video frames is to capture Low Dynamic Range (LDR) images at varying shutter speeds. They are then merged into a single image covering the entire brightness range of the scene. While shutter speeds are often chosen to vary by a constant factor, we propose an adaptive approach. The scene's histogram together with functions judging the contribution of an...
Driver assistance system enhances traffic safety and efficiency. Accurate 3D pose of front vehicle can help driver to make right decisions on road. We propose a novel real-time system to estimate 3D pose of the front vehicle. This system consists of two parallel threads: vehicle rear tracking and mapping. Vehicle rear is firstly identified in the video captured by an on-board camera, after license...
Active and automatic camera tampering detection is more and more important, especially for wide area surveillance systems with large amount of video cameras installed. Generally, a camera functions for video recording and lacks the ability to detect whether tampering has occurred. Most tampering solutions are passive, as evidenced by many surveillance systems frequently left unattended. Tampering...
Allocating computing resources to different tasks of surveillance systems has always been a big challenge. The problem becomes complicated when it requires dealing with real-time computation and decision making as the system cannot afford of processing all sensory feeds and execute computationally expensive algorithms. In multi-modal surveillance systems, real-time event detection and understanding...
Audiovisual group communication systems deal with a large number of video streams, and, unlike less advanced videoconferencing systems, require intelligence for selecting adequate views for each of the connected rooms, in order to convey best what is happening in the other locations. Such a decision making component, in our implementation called Orchestration Engine (OE), acts as a Virtual Director...
This paper presents algorithm for fast connected component labeling of the binary images. Simplicity of the algorithm predetermines its use especially in real-time applications like human computer interfaces. Current algorithms are based on different hierarchical structures and union-trees. The presented algorithm does not connect every component as in a common approach. Instead, some regions stay...
We demonstrate our novel video-based real-time traffic event notification and verification system LOOK2. It generates fast and reliable traffic information about relevant traffic state and road conditions changes on observed roads. It utilizes installed road-side sensors providing low-level traffic and environmental data, as well as video sensors which gain high-level traffic information from live...
For solving the problem of false tracking by Continuously Adaptive Mean Shift (CAMSHIFT) algorithm when sharing significant color similarity between object and background and changes of object color, moreover, for avoiding selecting initial target object by hand, an adaptive robust objects tracking algorithm based on active camera is proposed. It uses the disparity of global and local motion to detect...
During the last years, VISIR (Virtual Instrument Systems in Reality) has proved itself a useful tool for electronics remote experimentation, having been deployed in several different universities. As a domain-specific remote laboratory, VISIR offers those features which are required for its stand-alone usage, such as authentication, scheduling, user management, etc. Though for certain purposes this...
Estimation of a object pose from camera is a well-developing topic in computer vision. In theory, the pose from a calibrated camera can be uniquely determined. But in practice, most of the real-time pose estimation algorithms suffer from pose ambiguity due to low accuracy of the target object. We think that pose ambiguity¡Xtwo distinct local minima of the according error function¡Xexist because of...
Human has the ability to roughly estimate the distance and size of an object because of the stereo vision of human's eyes. In this project, we proposed to utilize stereo vision system to accurately measure the distance and size (height and width) of object in view. Object size identification is very useful in building systems or applications especially in autonomous system navigation. Many recent...
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