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As a non-verbal communication mean, head gestures play an important role in face-to-face conversation and recognizing them is therefore of high value for social behavior analysis or Human Robotic Interactions (HRI) modelling. Among the various gestures, head nod is the most common one and can convey agreement or emphasis. In this paper, we propose a novel nod detection approach based on a full 3D...
We introduce local feature points to achieve face clustering for consumer photos. After combining eigenfaces with context information like clothes, we further investigate the usage of local feature points to match face images. The relationships between face images are constructed by feature matching and then described as a graph. Outliers in the results of preliminary clustering are detected and are...
We address the problem of human action understanding of the upper human body from video sequences. Time-sequential images expressing human actions are transformed to sequences of feature vectors containing the configuration of the human body. A human is modeled as a collection of body parts, linked in a kinematic structure. The relation of the joints is used to estimate the human pose. A proposed...
This paper presents a novel method for reducing a baseball video segment from one batter to next batter into a more compact pitch-by-pitch video by pitching ball trajectory detection. The pitch-by-pitch video shows the complete pitching and batting process and largely reduces the source video data, making pitching analysis of broadcast baseball sequences an easier task. The proposed method has been...
Image registration is a fundamental task in image processing. In feature-based image registration, feature matching is the key but difficult step. In this paper, a point matching algorithm, which takes use of convex hull of point set and establishes correspondence between matched hull vertices, is proposed. Mapping parameters and point sets are updated after each step. After all points are processed,...
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