OBJECTIVES Excessive daytime sleepiness (EDS) is a common sleep complaint in the population and is increasingly recognised as deleterious for health. Simple and sensitive tools allowing identifying individuals at greater risk of EDS would be of public health importance. Hence, we determined trajectories of body silhouette from early childhood to adulthood and evaluated their association with ED...

In this paper a region based technique is proposed to search complex human activity in a video. Most of the current activity recognition systems deals with single action type but in this system, by taking meaningful composition of different types of human actions, complex human activity is constructed which is searched in a video sequence. To extract features, this system employed the surroundi...

In this paper, a decision support system for ship identification is presented. The system receives as input a silhouette of the vessel to be identified, previously extracted from a side view of the object. This view could have been acquired with imaging sensors operating at different spectral ranges (CCD, FLIR, image intensifier). The input silhouette is preprocessed and compared to those store...

This paper presents a method to measure online the gait features from the gait silhouette images and reflect the gait features to CG characters for an audience-participation digital entertainment. First, both static and dynamic gait features are extracted from the silhouette images captured by the online gait measurement system with two cameras and a chroma-key background. Then, Standard Gait M...

This paper presents fast and robust per-sample correct shadows for WebGL platform. The algorithm is based on silhouette shadow volumes and it rivals the standard shadow mapping performance. Our performance is usually superior when compared with high resolution shadow maps. Moreover, it does not suffer from a number of artefacts of shadow mapping and always provides per-pixel correct results. We...

In this paper, we present a method which combines imagebased visual hull and human body part segmentation for overcoming the inability of the visual hull method to reconstruct concave regions. The virtual silhouette image corresponding to the given viewing direction is first produced with image-based visual hull. Human body part localization technique is used to segment the input images and the...

This paper presents a novel approach is described for realtime human/vehicle classification and motion analysis in real visual surveillance scene. Spatio-temporal 1-D signals based on the distances between the outer contour of binarized silhouette of a motion object and a bounding box placed around the silhouette are chosen as the basic image features called the distance vectors. The spatio-tem...

1. Plane All parts of the image that are locally planar, i.e. can be represented as a position and a normal. We construct a planar surface feature for each pixel in coplanar clusters of size ≥ 100. 2. Silhouette We have found it useful to mark depth discontinuities with a separate feature type. These are represented as a point, normal and a direction along the silhouette. Normal and direction a...