A Study of Receptive Fields on Neurons of Cat's Visual Cortex as Filters of Spatial Frequency PDF Download
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Author: V. D. Glezer
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
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Book Description
The striation of a stimulus passing across a complex or supercomplex receptive field of a cat's visual cortex (RFVC) defines the characteristics of the field's responses. For each RF (receptive field) an optimum stimulus which evokes a maximum response can be found. The more bands there are in the optimum stimulus, the smaller is the average width of bars and the intervals between them. The effective areas of the stimulus is independent of the number of bands it contains and is equal to 2.6 degrees on the average (in diameter). The column of neurons with identical orientation of the RFs contains fields in which optimum stimuli consist of a different number of bands. These data lead one to assume that the RFVC are narrow-band filters of spatial frequencies and perform a piecewise Fourier transform of the image. A network of such neurons will discern the boundary between textures.
Author: V. D. Glezer
Publisher:
ISBN:
Category :
Languages : en
Pages : 21
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Book Description
The striation of a stimulus passing across a complex or supercomplex receptive field of a cat's visual cortex (RFVC) defines the characteristics of the field's responses. For each RF (receptive field) an optimum stimulus which evokes a maximum response can be found. The more bands there are in the optimum stimulus, the smaller is the average width of bars and the intervals between them. The effective areas of the stimulus is independent of the number of bands it contains and is equal to 2.6 degrees on the average (in diameter). The column of neurons with identical orientation of the RFs contains fields in which optimum stimuli consist of a different number of bands. These data lead one to assume that the RFVC are narrow-band filters of spatial frequencies and perform a piecewise Fourier transform of the image. A network of such neurons will discern the boundary between textures.
Author: Bertram Payne
Publisher: Academic Press
ISBN: 0080525326
Category : Medical
Languages : en
Pages : 733
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Book Description
Written by experts on the forefront of investigations of brain function, vision, and perception, the material presented is of an unparalleled scientific quality, and shows that analyses of enormous breadth and sophistication are required to probe the structure and function of brain regions. The articles are highly persuasive in showing what can be achieved by carrying out careful and imaginative experiments. The Cat Primary Visual Cortex should emerge as essential reading for all those interested in cerebral cortical processing of visual signals or researching or working in any field of vision. Comprehensive account of cat primary visual cortex Generous use of illustrations including color Covers research from structure to connections to functions Chapters by leaders in the field Topics presneted on multiple, compatible levels
Author: G.A. Orban
Publisher: Springer Science & Business Media
ISBN: 3642464696
Category : Medical
Languages : en
Pages : 382
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Book Description
The invitation by the editors of the series "studies of brain function" to contribute a monograph on the visual cortex gives me the opportunity to present in a concentrated manner much of the work I have done on the visual cortical areas of cat and monkey. However, the field of visual cortical physi ology is so active and so diverse that the presentation of only my own work would have given a very incomplete view of visual cortical functioning. Therefore this monograph also reviews most of the studies carried out on the subject in the last two decades. Where possible I have tried not only to describe the cortical machinery but also its possible functional purpose regarding vision. In doing this I have expressed my personal views rather than just reviewing the experimental facts. Much of the work presented in this monograph has been supported by the National Research Council of Belgium and the Research Council of the Catholic University of Leuven. I express my gratitude to them. I have en joyed collaborating in these studies with P. O. Bishop, H. Kato, H. Kennedy, K. P. Hoffmann, H. Maes, J. Duysens, E. Vandenbussche, and H. van der Glas. I am much indebted to all those who have commented on earlier versions of this monograph: J. Allman, H. Barlow, J. BuBier, M. Callens, J. Duysens, O. J. Griisser, P. Heggelund, H. Kennedy, L. C. Orban and L. Palmer.
Author: John S. Werner
Publisher: MIT Press
ISBN: 0262019167
Category : Science
Languages : en
Pages : 1693
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Book Description
A comprehensive review of contemporary research in the vision sciences, reflecting the rapid advances of recent years. Visual science is the model system for neuroscience, its findings relevant to all other areas. This essential reference to contemporary visual neuroscience covers the extraordinary range of the field today, from molecules and cell assemblies to systems and therapies. It provides a state-of-the art companion to the earlier book The Visual Neurosciences (MIT Press, 2003). This volume covers the dramatic advances made in the last decade, offering new topics, new authors, and new chapters. The New Visual Neurosciences assembles groundbreaking research, written by international authorities. Many of the 112 chapters treat seminal topics not included in the earlier book. These new topics include retinal feature detection; cortical connectomics; new approaches to mid-level vision and spatiotemporal perception; the latest understanding of how multimodal integration contributes to visual perception; new theoretical work on the role of neural oscillations in information processing; and new molecular and genetic techniques for understanding visual system development. An entirely new section covers invertebrate vision, reflecting the importance of this research in understanding fundamental principles of visual processing. Another new section treats translational visual neuroscience, covering recent progress in novel treatment modalities for optic nerve disorders, macular degeneration, and retinal cell replacement. The New Visual Neurosciences is an indispensable reference for students, teachers, researchers, clinicians, and anyone interested in contemporary neuroscience. Associate Editors Marie Burns, Joy Geng, Mark Goldman, James Handa, Andrew Ishida, George R. Mangun, Kimberley McAllister, Bruno Olshausen, Gregg Recanzone, Mandyam Srinivasan, W.Martin Usrey, Michael Webster, David Whitney Sections Retinal Mechanisms and Processes Organization of Visual Pathways Subcortical Processing Processing in Primary Visual Cortex Brightness and Color Pattern, Surface, and Shape Objects and Scenes Time, Motion, and Depth Eye Movements Cortical Mechanisms of Attention, Cognition, and Multimodal Integration Invertebrate Vision Theoretical Perspectives Molecular and Developmental Processes Translational Visual Neuroscience
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1840
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Book Description
Author: Maureen Ann Valerie Gremillion
Publisher:
ISBN:
Category :
Languages : en
Pages : 628
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Book Description
Author: Anthony Merrill Truchard
Publisher:
ISBN:
Category :
Languages : en
Pages : 596
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Book Description
Author: Peter C. Dodwell
Publisher: Routledge
ISBN: 1000363708
Category : Psychology
Languages : en
Pages : 264
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Book Description
The aim of this book, originally published in 1984, was to bring together a number of approaches to this important topic. Significant advances had been made in the two decades before publication in our understanding of many aspects of the coding that occurs along the visual pathways. The major developments had been associated with probing the nature of "logical" processes, whether physiologically or psychophysically, and relatively less attention had been devoted to the problem of how such locally coded knowledge is put together to yield coherent representations of spatially (and temporally) extended patterns – that is, to figural synthesis. Thus, while a great deal was known about the responses of individual cells in the visual system to controlled stimulation, and about the specificity of the orientational and spatial-frequency tuning of channels assessed psychophysically, there had been much less discussion of how such knowledge could be brought to bear on the general problems of understanding pattern recognition.
Author: Germano Resconi
Publisher: Springer
ISBN: 3642279724
Category : Technology & Engineering
Languages : en
Pages : 284
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Book Description
The book is on the geometry of agent knowledge. The important concept studied in this book is the Field and its Geometric Representation. To develop a geometric image of the gravity , Einstein used Tensor Calculus but this is very different from the knowledge instruments used now, as for instance techniques of data mining , neural networks , formal concept analysis ,quantum computer and other topics. The aim of this book is to rebuild the tensor calculus in order to give a geometric representation of agent knowledge. By using a new geometry of knowledge we can unify all the topics that have been studied in recent years to create a bridge between the geometric representation of the physical phenomena and the geometric representation of the individual and subjective knowledge of the agents.
Author: Qi Zhao
Publisher: Springer
ISBN: 9811002134
Category : Technology & Engineering
Languages : en
Pages : 316
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Book Description
Despite a plethora of scientific literature devoted to vision research and the trend toward integrative research, the borders between disciplines remain a practical difficulty. To address this problem, this book provides a systematic and comprehensive overview of vision from various perspectives, ranging from neuroscience to cognition, and from computational principles to engineering developments. It is written by leading international researchers in the field, with an emphasis on linking multiple disciplines and the impact such synergy can lead to in terms of both scientific breakthroughs and technology innovations. It is aimed at active researchers and interested scientists and engineers in related fields.
