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Neural Basis Of Depth Perception From Motion Parallax
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Book Synopsis Neural Basis of Depth Perception from Motion Parallax by : HyungGoo R.. Kim
Download or read book Neural Basis of Depth Perception from Motion Parallax written by HyungGoo R.. Kim and published by . This book was released on 2013 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: "When we move through the world, the motion of objects provides a sufficient cue for depth perception. For accurate depth measurements, the brain needs to resolve the depth-sign of objects (that is, whether the object is near or far relative to fixation). This is no easy task as depth-sign can be ambiguous based solely on visual motion. MT neurons are selective for depth-sign from motion parallax by combining retinal inputs and eye movement signals. We addressed three fundamental questions about how the brain uses motion parallax to code depth information. In the first experiment, we asked whether MT neurons are functionally linked to the perception of depth from motion parallax. Responses were recorded while macaque monkeys judged the depth-sign of visual stimuli containing motion parallax cues. We found that trial-by-trial variability of neural responses was correlated with the animal's perceptual decisions in the discrimination task. Greater responses predicted choices toward the depth preference of the recorded neurons. These results provide evidence that MT neurons may be involved in the perception of depth from motion parallax. In the second study, we investigated the nature of response modulation by eye movements. Direction-dependent modulation by eye movements yields the depth-sign selectivity of MT neurons. Responses of near-preferring neurons are suppressed when the eye moves toward the anti-preferred direction of neuron, whereas responses of far-preferring neurons are suppressed during eye movements toward the preferred direction. This response modulation exhibited both multiplicative and additive components, but the depth-sign selectivity of neurons was predicted only by the multiplicative gain change component. Using computer simulations, we show that a population of gain-modulated MT neurons can compute depth from motion parallax. Movement of an observer produces large background motion. In the third study, we hypothesized that neurons can use a visual consequence of self-motion (dynamic perspective cues) to compute depth-sign from motion parallax. We show that MT neurons can disambiguate depth-sign based on large-field background motion, in the absence of eye movements, and that these depth-sign preferences are correlated with those obtained when the animal is physically translated. MT neurons also contribute to depth perception from binocular disparity. It is likely that both eye movements and large field motion modulate MT responses to binocular images in a systematic way to encode the 3D spatial information of objects. These insights provide a deeper understanding of 3D information processing during navigation"--Pages v-vi.
Book Synopsis Depth Perception Through Motion by : Myron L. Braunstein
Download or read book Depth Perception Through Motion written by Myron L. Braunstein and published by Academic Press. This book was released on 2014-05-10 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Series in Cognition and Perception: Depth Perception Through Motion focuses on the processes, methodologies, and techniques involved in depth perception through motion, including optic array, rigid motions, illusions, and axis. The book first elaborates on the paradox of depth perception, illusions of motion in depth, and optic array. Discussions focus on rigid motions in three-dimensional space, perspective gradients, projection plane, stereokinetic effect, rotating trapezoid, and the windmill and fan illusions. The text then examines transformations leading to the perception of depth, slant perception, and perceived direction of rotary motion. Topics include shadow and computer projections, direct observation of rotating figures, a model of the perception of rotary motion, dynamic slant and static slant perception, translations along the Z axis, and rotations about the X or Y axis. The publication is intended for researchers and graduate students interested in depth perception in dynamic environments.
Book Synopsis The Neural Basis of Binocular Depth Perception by : Matthew Lindsay Patten
Download or read book The Neural Basis of Binocular Depth Perception written by Matthew Lindsay Patten and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: How does the human visual system convert two-dimensional projections from our eyes into a three-dimensional percept? One primary method is from binocular disparities, which result from having two horizontally separated eyes and are used to provide a powerful cue to depth in our environment. In this thesis, I use human fMRI to investigate the cortical signals associated with binocular disparity. I address several core issues, including the relationship between cortical activity and perception, the significance of the reference plane on depth configurations, and the topography of disparity signals on the cortical surface. In measuring responses to coarse and fine disparities, researchers typically engage two respective tasks: a signal-in-noise and a feature difference task. In the first chapter, we decouple the disparity magnitude from the perceptual task and examine cortical responses to both of these tasks when using fine disparities. Further, we manipulated performance and identified visual areas whose activity varied in line with perceptual judgments. We reveal that responses in later dorsal regions VIPS and POIPS were closely related to perception for both tasks. In the second chapter, we used a similar manipulation to investigate cortical regions that have solved the correspondence problem and whose responses were consistent with the depth percept of the observer, and reveal that this takes place in V7 and VIPS. The third chapter examines the importance of the reference in disparity calculations. We performed several classifications based on depths that were considered relative to fixation or relative to the surround. We found that early visual areas were most sensitive to disparity edges; dorsal visual areas used both the fixation plane and the surround in computing disparity whereas ventral visual areas processed disparity with reference to the surround. In the fourth chapter, we attempt to identify a topographic organisation of binocular disparity in the visual cortex. We estimate the disparity preferences of each voxel in two distinct ways, and displayed these preferences on a flatmap of the cortical surface. Although we did not observe a topographic map of disparity, we observed a cluster in intermediate dorsal regions (V3A, V3B/KO, V7) that consistently showed a bias towards crossed disparities of a larger magnitude.
Book Synopsis Visual Motion and Its Role in the Stabilization of Gaze by : Frederick Albert Miles
Download or read book Visual Motion and Its Role in the Stabilization of Gaze written by Frederick Albert Miles and published by Elsevier Science & Technology. This book was released on 1993 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardbound. This fifth volume of Reviews of Oculomotor Research is mainly concerned with the visual stabilization mechanisms but, unlike the previous volumes in the series, the coverage goes beyond the mammalian literature. The emphasis is on the visual processing problems that must be solved if the motor responses are to be appropriate. Chapters are included dealing specifically with the psychophysics and physiology of visual motion, areas of intense research activity in recent years.The first section deals with the fundamental problem of how motion is first decoded by the visual system. The second section deals with more global aspects of the visual motion experienced by the moving observer. The third and last section deals with specific stabilizing behaviors and their underlying physiology.An excellent book, at the cutting edge of research developments in visual stabilization mechanisms.
Book Synopsis The Role of Motion Parallax in Depth Perception by : John Nelson Park
Download or read book The Role of Motion Parallax in Depth Perception written by John Nelson Park and published by . This book was released on 1964 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Foundations of Vision by : Brian A. Wandell
Download or read book Foundations of Vision written by Brian A. Wandell and published by Sinauer Associates, Incorporated. This book was released on 1995 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed for students, scientists and engineers interested in learning about the core ideas of vision science, this volume brings together the broad range of data and theory accumulated in this field.
Book Synopsis Motion Parallax-defined Segmentation and Depth Perception in Human Vision by : Ahmad Yoonessi
Download or read book Motion Parallax-defined Segmentation and Depth Perception in Human Vision written by Ahmad Yoonessi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Furthermore, eye movements were independent of the actual stimulus motion for shear, whereas they showed some dependence in dynamic occlusion. Psychophysical performance was significantly correlated with the accuracy of eye movements, primarily in the mid-range values of rendered depth. Taken together, these studies demonstrated distinct patterns of results for segmentation and depth performance across different ranges of rendered depth. These findings suggest that motion parallax information might be processed by distinct mechanisms, perhaps in separate areas of the visual cortex, depending upon the amount of depth in the visual stimulus." --
Book Synopsis Development of Depth Perception Mediated by Motion Parallax in Unidimensional Projections of Rotation in Depth by : David L. Carpenter
Download or read book Development of Depth Perception Mediated by Motion Parallax in Unidimensional Projections of Rotation in Depth written by David L. Carpenter and published by . This book was released on 1974 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neural Basis of Motion Perception for Visual Navigation by : Saqib Ishaq Khan
Download or read book Neural Basis of Motion Perception for Visual Navigation written by Saqib Ishaq Khan and published by . This book was released on 2010 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Delays on Depth Perception by Motion Parallax in Virtual Environment by : Hanfeng Yuan
Download or read book Effects of Delays on Depth Perception by Motion Parallax in Virtual Environment written by Hanfeng Yuan and published by . This book was released on 1999 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On Improving Depth Perception with Motion Parallax and Occlusion and Its Application to Interactive Displays by :
Download or read book On Improving Depth Perception with Motion Parallax and Occlusion and Its Application to Interactive Displays written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seeing in Depth: Depth perception by : Ian P. Howard
Download or read book Seeing in Depth: Depth perception written by Ian P. Howard and published by . This book was released on 2002 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sensory Experience, Adaptation, and Perception by : Lothar Spillman
Download or read book Sensory Experience, Adaptation, and Perception written by Lothar Spillman and published by Psychology Press. This book was released on 2013-05-13 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published in 1983, Sensory, Experience, Adaptation, and Perception is a valuable contribution to the field of Cognitive Psychology.
Book Synopsis Neural Mechanisms of Binocular Motion in Depth Perception by : Milena Kaestner
Download or read book Neural Mechanisms of Binocular Motion in Depth Perception written by Milena Kaestner and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Motion Parallax in the Perception of Distance, Depth and Size by : Deborah Griffin Wheeler
Download or read book The Role of Motion Parallax in the Perception of Distance, Depth and Size written by Deborah Griffin Wheeler and published by . This book was released on 1982 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neural Basis of Visual Motion Perception by : Yunmin Wu
Download or read book Neural Basis of Visual Motion Perception written by Yunmin Wu and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stevens' Handbook of Experimental Psychology and Cognitive Neuroscience, Sensation, Perception, and Attention by :
Download or read book Stevens' Handbook of Experimental Psychology and Cognitive Neuroscience, Sensation, Perception, and Attention written by and published by John Wiley & Sons. This book was released on 2018-02-12 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt: II. Sensation, Perception & Attention: John Serences (Volume Editor) (Topics covered include taste; visual object recognition; touch; depth perception; motor control; perceptual learning; the interface theory of perception; vestibular, proprioceptive, and haptic contributions to spatial orientation; olfaction; audition; time perception; attention; perception and interactive technology; music perception; multisensory integration; motion perception; vision; perceptual rhythms; perceptual organization; color vision; perception for action; visual search; visual cognition/working memory.)
