Real-time identity-independent estimation of head pose from prototype images is a perplexing task requiring pose-invariant face detection. The problem is exacerbated by changes in illumination, identity and facial position. We approach the problem using a view-based statistical learning technique based on similarity of images to prototypes. For this method to be effective, facial images must be...

Figure (A) Coronal, contrast-enhanced, T1-weighted, head showed a left parietal ring-enhancing multilocular lesion showed restricted diffusion on axial diffusion-we seen on apparent diffusion coefficient (ADC) imaging. Funding: None. Conflict of Interest: None. Authorship: All authors had access to the data and participated in writing the manuscript. Requests for reprints should be addressed to...

The optics of head-mounted displays (HMDs) is designed from the pupil of the eye to the miniature display, and the optics is thus commonly solely assessed in the plane of the miniature display. Such assessment does not provide information that usefully interfaces with task-based performance metrics. We present a comprehensive framework for the assessment of the optics of HMDs in visual space, w...

This paper presents a multiple camera system to determine the head pose of people in an indoor setting. Our approach extends current eye tracking techniques from a single camera system to a multiple camera system. The head pose of a person is determined by triangulating multiple facial features that are obtained in real-time from eye trackers. Our work is unique in that it allows us to observe ...

It is commonly accepted that the mental representation and processing of number and of space are tightly linked. This is evident from studies showing relations between math ability and visuospatial skill. Also, math instruction and education rely strongly on visuospatial tools and strategies. The dominant explanation for these number-space interactions is that the mental representation of numbe...

BACKGROUND Whether, and how, animals move requires them to assess their environment to determine the most appropriate action and trajectory, although the precise way the environment is scanned has been little studied. We hypothesized that head attitude, which effectively frames the environment for the eyes, and the way it changes over time, would be modulated by the environment. METHOD To tes...

In Virtual-Environment (VE) Applications, where virtual objects are presented in a head-mounted display, virtual images must be continuously stabilized in space against the user’s head motion. Latencies in head-motion compensation cause virtual objects to swim around instead of being stable in space. This results in an unnatural feel, disorientation, and simulation sickness in addition to error...

Imaging is an integral part of head and neck cancer staging and assessing resectability. Accurate perception of imaging information by the clinician is possible only by effective communication between radiologist and surgeon. Traditionally, the radiologist studies the head neck region with two dimensional cross-sectional imaging. The surgeon perceives the head and neck region by real-time exper...

We present a modeland exemplar-based technique for head pose tracking. Because of the dynamic nature, it is not possible to represent face appearance by a single texture image. Instead, we sample the complex face appearance space by a few reference images (exemplars). By taking advantage of the rich geometric information of a 3D face model and the flexible representation provided by exemplars, ...