Aging and Estimation of time to collision
نویسندگان
چکیده
منابع مشابه
Estimation of Time-to-Collision Maps
We address in this paper the problem of estimating time-to-collision maps involving all the objects in relative motion with respect to the camera. The approach only takes into account normal flows. Moreover we prove that first-order visual motion models are sufficient to obtain time-to-collision. Experiments have been carried out on real images to validate the performance of the method.
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The τ-function and the η-function are phenomenological models that are widely used in the context of timing interceptive actions and collision avoidance, respectively. Both models were previously considered to be unrelated to each other: τ is a decreasing function that provides an estimation of time-to-contact (ttc) in the early phase of an object approach; in contrast, g has a maximum before t...
متن کاملTime to Collision and Collision Risk Estimation from Local Scale and Motion
Computer-vision based collision risk assessment is important in collision detection and obstacle avoidance tasks. We present an approach to determine both time to collision (TTC) and collision risk for semi-rigid obstacles from videos obtained with an uncalibrated camera. TTC for a body moving relative to the camera can be calculated using the ratio of its image size and its time derivative. In...
متن کاملTime-to-collision and Collision Avoidance Systems
In research on Traffic Conflicts Techniques, Time-To-Collision (TTC) has proven to be an effective measure for rating the severity of traffic conflicts and for discriminating critical from normal behaviour. The results of several studies point to the direct use of TTC as a cue for decision-making in traffic. The current development of driver support systems based on the application of modern te...
متن کاملChronomics, human time estimation, and aging
BACKGROUND Circadian rhythm stage affects many outcomes, including those of mental aging. METHODS Estimations of 1 minute approximately 5 times/day for a year, 25 years apart, by a healthy male biomedical scientist (RBS), are analyzed by the extended cosinor. RESULTS Cycles of a half-week, a week, approximately 30 days, a half-year and a year, in self-assessed 1-minute estimation by RBS bet...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2004
ISSN: 1534-7362
DOI: 10.1167/4.8.755