Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 45 for “"Motion perception"”.
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Motion perception and the scene statistics of motion
Motion coding in the brain undoubtedly reflects the statistics of retinal image motion occurring in the natural environment. Measuring the statistics of motion in natural scenes is an important tool for building our understanding of how the brain works. Unfortunately, there are statistics that are …
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THE FUNCTIONAL ROLES OF THE MOTION PERCEPTION SYSTEMS
… are several sources of visual information about motion. One is simply the motion on the retina, known as optic flow, caused by motion in the world. Another source of flow-based information is the differences between the optic flow fields of the two eyes, known as interocular velocity differences. …
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Nystagmus generation, oculomotor tracking and visual motion perception.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1974.
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Studies on the rotation problem in self-motion perception
Contains fulltext : 121139.pdf (Publisher’s version ) (Open Access)
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Multisensory integration in spatial orientation and self-motion perception
Contains fulltext : 143186.pdf (Publisher’s version ) (Open Access)
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Motion perception with conflicting or congruent visual and vestibular cues
… on a daily basis to estimate our position and motion in space by centrally combining noisy, incomplete, and potentially conflicting or ambiguous, information from both sensory sources (e.g. vestibular organs, visual, proprioceptive), and non-sensory sources (e.g. efferent copy, cognition)). …
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The effect of G-seat tactile cueing on linear motion perception
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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On the role of correspondence noise in human visual motion perception. A systematic study on the role of correspondence noise affecting Dmax and Dmin, using random dot kinematograms: A psychophysical and modelling approach.
… false pairing of dots in adjacent frames) limits motion detection performance in random dot kinematograms (RDKs). The performance measures of interest are Dmax and Dmin i.e., the largest and smallest inter-frame dot displacement, respectively, for which motion can be reliably detected. Dmax and …
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Effects of field of view, MTF shape, and noise upon the perception of image quality and motion
… observer's ability to perceive egocentric motion from a display. The third and final objective was to provide a discussion of the use of image quality metrics for the evaluation of displays that are designed to facilitate motion perception. To meet these objectives, two experiments were …
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Visual System Development in People with One Eye: Behaviour and Structural Neural Correlates
… form vision, although its consequences on motion perception development are less clear. Changes in brain structure following early monocular enucleation have either been assessed in species whose visual system is quite different from humans, or in enucleated monkeys and humans following …
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Virtual equivalence : matching visual scene and treadmill walking speeds in virtual reality
… such as moving independently of our head motions. These findings are important for a perceptually sensitive environment, such as virtual reality. Designers of virtual environments that utilize self-motion perception should consider calibrating PERs within a session for each individual user …
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The influence of load on kinematics of computer-simulated sagittal-plane lifting.
… the results will help in the understanding of motion perception, lifting technique, and low-back pain.
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Visual Perception in Hearing Sign Language Users
Deaf signers exhibit superior visual perception compared to hearing controls in several domains, including the perception of faces and peripheral motion. These visual enhancements are thought to compensate for an absence of auditory input. However, it is also possible that they reflect experience …
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Mechanisms of Sensory Adaptation in the Primate Visual System
… We found that the processes underlying motion perception in ecological vision are mediated by an adaptive center-surround mechanism that trade-offs spatiotemporal resolution for signal enhancement when the signal is weak. We proposed a new dynamic neural network that can account for …
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An fMRI dataset of 1,102 natural videos for visual event understanding
… visual processes, from object recognition to motion perception. Thus, studying the neural correlates of visual event understanding requires brain responses that capture the entire transformation from video-based stimuli to high-level conceptual understanding. However, despite its ecological …
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The Functional Dissection of Motion Processing Pathways in the Human Visual Cortex Using fMRI-Guided TMS
Motion-selectivity in human visual cortex comprises a number of different cortical loci including V1, V2, V3A, V3B, hV5/MT+ and V6 (Wandell et al., 2007). This thesis sought to investigate the specific functions of V3A and sub-divisions of hV5/MT+ (TO-1 and TO-2) by using transcranial magnetic …
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Perceptual models for high-refresh-rate rendering
… specifically, I focus on spatio-temporal perception, a topic that has received remarkably less attention than spatial-only perception so far. I present three main contributions. First, I demonstrate the validity of the perceptual approach by presenting a conceptually simple rendering …
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Stochastic architectures for probabilistic computation
… our circuits can solve problems of depth and motion perception, perceptual learning and causal reasoning via inference over 10,000+ latent variables in real time - a 1,000x speed advantage over commodity microprocessors - by exploiting stochasticity. I will show how this natively stochastic …
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Bayesian motion estimation and segmentation
Estimating motion in scenes containing multiple moving objects remains a difficult problem in computer vision yet is solved effortlessly by humans. In this thesis we present a computational investigation of this astonishing performance in human vision. The method we use throughout is to formulate a …
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