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This volume deals with the visual perception of lightness, brightness, and transparency of surfaces, both under minimal laboratory conditions and in complex images typical of everyday life. Each chapter analyzes the challenging problem of how a pattern of light intensities on the retina is transformed into the visual experience of varying shades of grey, transparent surfaces, and light and shadow. One important theme which unifies the group of contributions is the recognition that the perception of surface lightness is rooted fundamentally in the encoding of relative intensities of light within the retinal image, not intensities per se. A second important unifying theme is an appreciation of...
This posthumous volume, the culmination of a long and distinguished career, brings together an original essay by the author together with a careful selection of previously published articles (most by Rock) on the theory that perception is an indirect process in which visual experience is derived by inference, rather than being directly and independently determined by retinal stimulation.
How the human visual system determines the lightness of a surface, that is, its whiteness, blackness, or grayness, remains--like vision in general--a mystery. In fact, we have not even been able to create a machine that can determine, through an artificial vision system, whether an object is white, black, or gray. Although the photoreceptors in the eye are driven by light, the light reflected by a surface does not reveal its shade of gray. Depending upon the level of illumination, a surface of any shade of gray can reflect any amount of light. In Seeing Black and White Alan Gilchrist ties together over 30 years of his own research on lightness, and presents the first comprehensive, historica...
First Published in 1994. Routledge is an imprint of Taylor & Francis, an informa company.
In this book the authors relate and discuss the idea that perceptual processes can be considered at many levels. A phenomenon that appears at one level may not be the same as a superficially similar phenomenon that appears at a different level. For example "induced motion" can be analyzed in terms of eye movements or at the retinal level or at a much higher cognitive level: how do these analyses fit together? The concept of levels also makes us think of the flow of information between levels, which leads to a consideration of the roles of top-down and bottom-up (or feed-forward, feed-back) flow. There are sections devoted to vestibular processing, eye movement processing and processing during brightness perception. The final section covers levels of processing in spatial vision. All scientists and graduate students working in vision will be interested in this book as well as people involved in using visual processes in computer animations, display design or the sensory systems of machines.
Tyler Burge presents a substantial, original study of what it is for individuals to represent the physical world with the most primitive sort of objectivity. By reflecting on the science of perception and related psychological and biological sciences, he gives an account of constitutive conditions for perceiving the physical world, and thus aims to locate origins of representational mind. Origins of Objectivity illuminates several long-standing, central issues in philosophy, and provides a wide-ranging account of relations between human and animal psychologies.
In a major Contribution to the theory of perception, A.D.Smith presents a truly original defense of direct realism the view that in perception we are directly aware of things in a physical world. It offers two arguements against direct realism-one conceening illusion, and one concerning hallueination that upto now no theory of perception could adequately rebut.At the heart of Smiths theory is a new way of drawing the distinction between perception and sensation alone with an unusual treatment of the nature of object of halluecination .
Many of us have been fascinated by visual illusions at some point, and have asked ourselves why something can look like one thing when it is fact something else. How can we perceive two different things, when the light coming into our eyes stays constant? This book brings together psychologists and philosophers to explore this aspect of vision.
This volume gathers together the work of David Rosenthal on the philosophical study of consciousness from the past 20 years and represents his theory of consciousness as higher-order thought. An introduction draws out the connections between the essays and highlights their implications.
This title focuses on vision as an active process, rather than a passive activity and provides an integrated account of seeing and looking. The authors give a thorough description of basic details of the visual and oculomotor systems necessary to understand active vision.