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Head pose estimation from images has recently attracted much attention in computer vision due to its diverse applications in face recognition, driver monitoring and human computer interaction. Most successful approaches to head pose estimation formulate the problem as a nonlinear regression between image features and continuous 3D angles (i.e. yaw, pitch(More)
Many applications in computer vision (e.g., games, human computer interaction) require a reliable and early detector of visual events. Existing event detection methods rely on one-versus-all or multi-class classifiers that do not scale well to online detection of large number of events. This paper proposes Sequential Max-Margin Event Detectors (SMMED) to(More)
—Broadleaf forest is a major type of Earth's land cover with the highest observable vegetation density. Retrievals of bio-physical parameters, such as leaf area index (LAI), of broadleaf forests at global scale constitute a major challenge to modern remote sensing techniques in view of low sensitivity (saturation) of surface reflectances to such parameters(More)
The injection of emotional intelligence in human-computer interfaces is necessary for computer applications to appear intelligent when interacting with people. With the recent development of brain imaging techniques and brain-computer interfaces, computers can actually take a look inside users' head to observe their emotional states. This paper presents an(More)
—In this paper, we propose a novel data stream clustering algorithm, termed SVStream, which is based on support vector domain description and support vector clustering. In the proposed algorithm, the data elements of a stream are mapped into a kernel space, and the support vectors are used as the summary information of the historical elements to construct(More)
—Web applications are mostly designed with multiple tiers for flexibility and software reusability. It is difficult to model the behavior of multi-tier Web applications due to the fact that the workload is dynamic and unpredictable and the resource demand in each tier is different. Those features also cause the task of resource allocation for multi-tier Web(More)