Thresholds for Visual Detection of Motion PDF Download
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Author: Charles Robert Blackwell
Publisher:
ISBN:
Category : Motion perception (Vision)
Languages : en
Pages : 128
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Book Description
Author: Charles Robert Blackwell
Publisher:
ISBN:
Category : Motion perception (Vision)
Languages : en
Pages : 128
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Book Description
Author: Andrew T. Smith
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 504
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Book Description
The brain's ability to detect movement within the retinal image is crucial not only for determining the trajectories of moving objects, but also for identifying and interpreting image motion resulting from eye and head movements. This book summarizes our knowledge of how information about image motion is encoded in the brain. Key Features * Valuable reference source for those involved in the rapidly expanding area of motion perception * Strong emphasis on integration of physiological, computation, and psychophysical approaches * Topics include: * Principles of local motion detection * Inputs to local motion detectors * Integration of motion signals * Higher-order interpretation of motion * Motion detection and eye movements
Author: Alexander H Wertheim
Publisher:
ISBN: 9781461335702
Category :
Languages : en
Pages : 284
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 27
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Book Description
Our objectives were to apply Bayesian threshold estimation procedures and new technology to the determination of motion detection (angular velocity) and to determine whether threshold measures, combined with large screen technology and specialized software, could be used to evaluate human motion sensitivity in the far peripheral visual field beyond 50 degrees radius. With the use of the Parameter Estimation by Sequential Testing threshold estimation procedure, black dot targets were presented at 53.4, 72.6, and 90 degrees eccentricity in the temporal visual field of two subjects who had normal visual function. Motion detection thresholds demonstrated a systematic increase with increasing visual field eccentricity and could be obtained within 10 stimulus trials. The average angular velocity motion thresholds were approximately 0.5 degree per second for the 54.3-degree eccentricity, 1.2 to 1.5 degrees per second for the 72.6-degree eccentricity, and 2.1 degrees per second for the 90-degree eccentricity. Our findings indicate that it is possible to obtain motion detection (displacement) thresholds in the far peripheral visual field using Bayesian threshold estimation procedures. In view of the importance of motion detection in the periphery for stimulus localization, attentional demands, orientation and mobility tasks, this procedure may have significant applications for many military visual tasks.
Author: Brian A. Wandell
Publisher: Sinauer Associates, Incorporated
ISBN:
Category : Medical
Languages : en
Pages : 508
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Book Description
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.
Author: Santo Salvatore
Publisher:
ISBN:
Category : Eye
Languages : en
Pages : 68
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 27
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Book Description
Our objectives were to apply Bayesian threshold estimation procedures and new technology to the determination of motion detection (angular velocity) and to determine whether threshold measures, combined with large screen technology and specialized software, could be used to evaluate human motion sensitivity in the far peripheral visual field beyond 50 degrees radius. With the use of the Parameter Estimation by Sequential Testing threshold estimation procedure, black dot targets were presented at 53.4, 72.6, and 90 degrees eccentricity in the temporal visual field of two subjects who had normal visual function. Motion detection thresholds demonstrated a systematic increase with increasing visual field eccentricity and could be obtained within 10 stimulus trials. The average angular velocity motion thresholds were approximately 0.5 degree per second for the 54.3-degree eccentricity, 1.2 to 1.5 degrees per second for the 72.6-degree eccentricity, and 2.1 degrees per second for the 90-degree eccentricity. Our findings indicate that it is possible to obtain motion detection (displacement) thresholds in the far peripheral visual field using Bayesian threshold estimation procedures. In view of the importance of motion detection in the periphery for stimulus localization, attentional demands, orientation and mobility tasks, this procedure may have significant applications for many military visual tasks.
Author: Zhong-Lin Lu
Publisher: MIT Press
ISBN: 0262019450
Category : Science
Languages : en
Pages : 473
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Book Description
A comprehensive treatment of the skills and techniques needed for visual psychophysics, from basic tools to sophisticated data analysis. Vision is one of the most active areas in biomedical research, and visual psychophysical techniques are a foundational methodology for this research enterprise. Visual psychophysics, which studies the relationship between the physical world and human behavior, is a classical field of study that has widespread applications in modern vision science. Bridging the gap between theory and practice, this textbook provides a comprehensive treatment of visual psychophysics, teaching not only basic techniques but also sophisticated data analysis methodologies and theoretical approaches. It begins with practical information about setting up a vision lab and goes on to discuss the creation, manipulation, and display of visual images; timing and integration of displays with measurements of brain activities and other relevant techniques; experimental designs; estimation of behavioral functions; and examples of psychophysics in applied and clinical settings. The book's treatment of experimental designs presents the most commonly used psychophysical paradigms, theory-driven psychophysical experiments, and the analysis of these procedures in a signal-detection theory framework. The book discusses the theoretical underpinnings of data analysis and scientific interpretation, presenting data analysis techniques that include model fitting, model comparison, and a general framework for optimized adaptive testing methods. It includes many sample programs in Matlab with functions from Psychtoolbox, a free toolbox for real-time experimental control. Once students and researchers have mastered the material in this book, they will have the skills to apply visual psychophysics to cutting-edge vision science.
Author: J. Smit
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Eli Peli
Publisher: World Scientific
ISBN: 9789810221492
Category : Technology & Engineering
Languages : en
Pages : 438
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Book Description
This book is an international collection of contributions from academia, industry and the armed forces. It addresses current and emerging Spatial Vision Models and their application to the understanding, prediction and evaluation of the tasks of target detection and recognition. The discussion in many of the chapters is framed in terms of military targets and military vision aids. However, the techniques analyses and problems are by no means limited to this area of application. The detection and recognition of an armored vehicle from a reconnaissance image are performed by the same visual system used to detect and recognize a tumor in an X-ray. The analysis of the interaction of the human visual system with night vision devices is not different from the analysis needed in the case of an operator examining structures using a remote (endoscopic) camera, etc. The book is organized into three general sections. The first covers basic modeling of central (foveal) vision and its theoretical background. The second is centered on the evaluation of model performance in applications, while the third is dedicated to aspects of peripheral vision modeling and the expansion of peripheral modeling to include visual search.
