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  • user's head
  • His creation, HeadGaze , relies on the iPhone X's front-facing sensor array (via ARKit) to track the user's head movements. (techcrunch.com)
  • One advantage of the PCCR method is the high accuracy it achieves in gaze tracking because it compensates for the pupil center position based on the relative position of corneal specular reflection (SR). However, the PCCR method only works for user head movements within a limited range, and its performance is degraded by the natural movement of the user's head. (mdpi.com)
  • line of si
  • Note that when the line of sight is directed toward the new location (gaze end) that the head continues to move. (rochester.edu)
  • For example, we might hear or see an object in the periphery, and in order to visually localize and identify the object we need to plan and execute a movement which will re-direct our line of sight. (rochester.edu)
  • Then we must compute the difference between our current line of sight and the position of the target, incorporate information about the capabilities of the body segments which will contribute to moving the line of sight (e.g. the mobility of the eyes and head given their current positions), and coordinate more than 40 muscles and muscle groups to smoothly look at the target. (rochester.edu)
  • Humans
  • The fact that bumblebee head saccades are highly stereotyped as in humans, may hint at a common principle, where fast and precise motor control is used to reliably reduce the time during which the retinal images moves. (uni-bielefeld.de)
  • temporal
  • Kinematic analysis suggested that these asymmetric movements did not serve to maintain any fixed temporal relationship between right and left arrays, but rather to redirect the whiskers to a different region of space. (jneurosci.org)
  • Listing's law is the specific realization of the more general 'Donders' law', which states that for any one gaze direction the eye's 3D spatial orientation is unique and independent of how the eye reached that gaze direction (previous gaze directions / eye orientations / temporal movements). (wikipedia.org)
  • Four main hypotheses have been proposed for the function of SMA: the control of postural stability during stance or walking, coordinating temporal sequences of actions, bimanual coordination, and the initiation of internally generated as opposed to stimulus driven movement. (wikipedia.org)
  • tilt
  • Your child may turn her head or tilt her head back so that she can see something directly in front of her body. (livestrong.com)
  • If your child has an eyelid condition known as ptosis, in which his upper eyelid droops down over his eyes, he may tilt his head back and look "down" to see beyond his eyelids. (livestrong.com)
  • Different movements correspond to different actions in a demonstration app that shows the online retailer's daily deals: navigate through categories and products by tilting your head all the way in various directions, or tilt partway down to buy, save or share. (techcrunch.com)
  • Then the head may turn, pull or tilt in jerky movements, or sustain a prolonged position involuntarily. (wikipedia.org)
  • perception
  • This motion in the first case is reminiscent of a praying mantis peering its head left and right, apparently to obtain depth perception, hence the moniker "mantis head camera. (springer.com)
  • In the second case this motion is reminiscent of a pigeon bobbing its head back and forth, also apparently to obtain depth perception, hence the moniker "pigeon head camera. (springer.com)
  • Head-bobbing during walking, running and flying: Relative motion perception in the pigeon. (springer.com)
  • Actively moving the head corresponds with large changes in the relationship between the observer and the environment, sensorimotor processing, and spatiotemporal perception. (uwaterloo.ca)
  • stimulus
  • We examined how fruit flies adjust their gaze in response to a compound visual stimulus comprising a small moving figure against an independently moving wide-field ground, which they do either by re-orienting their head or by re-orienting their flight trajectory. (biologists.org)
  • primary
  • It is often assumed the primary position is at the mechanical center of the eye's range of movement. (wikipedia.org)
  • The studies hypothesize the hyper activation of the cortical areas is due to reduced pallidal inhibition of the thalamus, leading to over activity of the medial and prefrontal cortical areas and under activity of the primary motor cortex during movement. (wikipedia.org)
  • As with the vestibule, the primary purpose of the canals is to detect movement. (wikipedia.org)
  • compensate
  • A child may position his head to compensate for eye misalignment that may occur with conditions such as a "lazy eye. (livestrong.com)
  • experimental
  • We present the performance of the mantis head camera and pigeon head camera models and provide experimental results and error analysis of the algorithms. (springer.com)
  • Experimental results demonstrate that with our compensation method the gaze tracking system is more robust to natural head movements compared to other systems without our method and commercial systems. (mdpi.com)
  • bias
  • This finding indicates that discarding data with severe movement artifact may bias MS samples such that only subjects with less-severe cognitive impairment are included in the analyses. (healthcanal.com)
  • study
  • The purpose of this study was to investigate the sound pressure level (SPL) at head positions likely to be encountered in routine audiological practice. (biomedsearch.com)
  • Parts 2 and 3 of the study, investigated the SPL at two typical head heights of the infant population. (biomedsearch.com)
  • Kessler Foundation researchers study impact of head movement on. (bio-medicine.org)
  • move
  • Involuntary eye movements, a condition often referred to as a nystagmus, make the eyes appear to shake or move back and forth, up or down. (livestrong.com)
  • effects
  • These cues are also used by other animals, but there may be differences in usage, and there are also localization cues which are absent in the human auditory system, such as the effects of ear movements. (wikipedia.org)
  • system
  • The sophisticated head-tracking system like the one built into the iPhone X may have been intended for AR and security purposes, but it may also turn out to be very useful for people with disabilities. (techcrunch.com)
  • Kim, H.-C. Compensation Method of Natural Head Movement for Gaze Tracking System Using an Ultrasonic Sensor for Distance Measurement. (mdpi.com)
  • Jung D, Lee JM, Gwon SY, Pan W, Lee HC, Park KR, Kim H-C. Compensation Method of Natural Head Movement for Gaze Tracking System Using an Ultrasonic Sensor for Distance Measurement. (mdpi.com)
  • response
  • The 2nd part of this project involved the evaluation of head acceleration response during the hyge sled tests. (sae.org)
  • linear
  • As task difficulty increased, there was a linear increase in movement that was larger among subjects with lower cognitive ability. (healthcanal.com)