Perception Of Lightness And Brightness In Complex Patterns

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Perception of Lightness and Brightness in Complex Patterns

Author :
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.:/5 (227 download)

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Download or read book Perception of Lightness and Brightness in Complex Patterns written by and published by . This book was released on 1992 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perception of surface color plays important part in many everyday visual tasks. Psychophysical and neurophysiological data on early visual processes suggest a number of potential sensory limitations on the accuracy of surface-color perception. A new paradigm has been used to clarify the relationships between early visual processes and perception of achromatic surface colors (shades of gray). Psychophysical measurements of perceived surface color were made using achromatic stimulus patterns that were complex enough to support unambiguous perception of surfaces and lights. Lightness (apparent reflectance), brightness (apparent luminance) and local brightness contrasts were all measured using the same stimulus patterns. According to a number of models, lightness is closely related to local brightness contrast, but the data indicated that the relationship is more complicated than previously supposed. The brightness contrast data are well described by Stiles' threshold- vs-radiance curve, which is widely thought to be a characteristic of retinal adaptation processes. Both brightness and lightness are slightly higher on dark gray backgrounds than on white backgrounds. This perceptual error appear to be independent of illumination level.

Lightness, Brightness and Transparency

Author : Alan L. Gilchrist
Publisher : Psychology Press
ISBN 13 : 1134761465
Total Pages : 331 pages
Book Rating : 4.1/5 (347 download)

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Book Synopsis Lightness, Brightness and Transparency by : Alan L. Gilchrist

Download or read book Lightness, Brightness and Transparency written by Alan L. Gilchrist and published by Psychology Press. This book was released on 2013-09-05 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 the multiple dimensions of the visual experience of lightness, brightness, and transparency -- people do not perceive the lightness of surfaces by discarding information concerning the light illuminating those surfaces; rather, they perceive a pattern of illumination projected onto a pattern of surface greys. The long-fascinating problems of surface lightness and color perception have become very active topics recently as a resurging interest within the visual perception community has coincided with an increasing appreciation of the centrality of these problems by the emerging machine vision community. The best of recent psychophysical work on lightness perception, as presented in this volume, will be of great interest to both of these communities. This book also marks a synthesis of old and new. A traditional, strongly Gestalt, approach that had fallen into neglect is updated in the light of new quantitative systematic methods and important later discoveries, such as the disappearance of stabilized retinal images. The book draws on such diverse approaches as Gestalt and ecological psychology, threshold psychophysics, and computational vision, advancing our understanding of the interrelations among surface color, illumination, perceived depth, shading, and transparency.

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 818 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Lightness, Brightness and Transparency

Author : Alan L. Gilchrist
Publisher : Psychology Press
ISBN 13 : 1134761538
Total Pages : 332 pages
Book Rating : 4.1/5 (347 download)

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Book Synopsis Lightness, Brightness and Transparency by : Alan L. Gilchrist

Download or read book Lightness, Brightness and Transparency written by Alan L. Gilchrist and published by Psychology Press. This book was released on 2013-09-05 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 the multiple dimensions of the visual experience of lightness, brightness, and transparency -- people do not perceive the lightness of surfaces by discarding information concerning the light illuminating those surfaces; rather, they perceive a pattern of illumination projected onto a pattern of surface greys. The long-fascinating problems of surface lightness and color perception have become very active topics recently as a resurging interest within the visual perception community has coincided with an increasing appreciation of the centrality of these problems by the emerging machine vision community. The best of recent psychophysical work on lightness perception, as presented in this volume, will be of great interest to both of these communities. This book also marks a synthesis of old and new. A traditional, strongly Gestalt, approach that had fallen into neglect is updated in the light of new quantitative systematic methods and important later discoveries, such as the disappearance of stabilized retinal images. The book draws on such diverse approaches as Gestalt and ecological psychology, threshold psychophysics, and computational vision, advancing our understanding of the interrelations among surface color, illumination, perceived depth, shading, and transparency.

Journal of the Optical Society of America

Author :
Publisher :
ISBN 13 :
Total Pages : 732 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Journal of the Optical Society of America by :

Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1991 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Visual Perception from a Computer Graphics Perspective

Author : William Thompson
Publisher : CRC Press
ISBN 13 : 1439865493
Total Pages : 540 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Visual Perception from a Computer Graphics Perspective by : William Thompson

Download or read book Visual Perception from a Computer Graphics Perspective written by William Thompson and published by CRC Press. This book was released on 2016-04-19 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to human visual perception suitable for readers studying or working in the fields of computer graphics and visualization, cognitive science, and visual neuroscience. It focuses on how computer graphics images are generated, rather than solely on the organization of the visual system itself; therefore, the text pro

Levels of Perception

Author : Laurence Harris
Publisher : Springer Science & Business Media
ISBN 13 : 0387226737
Total Pages : 444 pages
Book Rating : 4.3/5 (872 download)

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Book Synopsis Levels of Perception by : Laurence Harris

Download or read book Levels of Perception written by Laurence Harris and published by Springer Science & Business Media. This book was released on 2006-04-29 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Encyclopedia of Perception

Author : E. Bruce Goldstein
Publisher : SAGE Publications
ISBN 13 : 1452266158
Total Pages : 1281 pages
Book Rating : 4.4/5 (522 download)

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Book Synopsis Encyclopedia of Perception by : E. Bruce Goldstein

Download or read book Encyclopedia of Perception written by E. Bruce Goldstein and published by SAGE Publications. This book was released on 2009-09-15 with total page 1281 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of perception is devoted to explaining the operation of the senses and the experiences and behaviors resulting from stimulation of the senses. Perceptual processes such as recognizing faces, seeing color, hearing music, and feeling pain represent the actions of complex mechanisms, yet we usually do them easily. The Encyclopedia of Perception presents a comprehensive overview of the field of perception through authoritative essays written by leading researchers and theoreticians in psychology, the cognitive sciences, neuroscience, and medical disciplines. It presents two parallel and interacting approaches: the psychophysical, or determining the relationship between stimuli in the environment and perception, and the physiological, or locating the biological systems responsible for perception. Are there any processes not associated with perception? Surely there are, but the pervasiveness of perception is truly impressive, and the phenomena of perception and its mechanisms are what this encyclopedia is about. Key Features Contains 16 pages of color illustration and photography to accompany the entries Offers a varied and broad list of topics, including basic research as well as methodologies, theoretical approaches, and real-world applications of perceptual research Emphasizes human perception but includes ample research because of its importance in its own right and because of what this research tells us about human perception Written by recognized experts from many disciplines but for an audience with no previous background in perception—students and members of the general public alike Key Themes Action Attention Audition Chemical Senses Cognition and Perception Computers and Perception Consciousness Disorders of Perception Illusory Perceptions Individual Differences (Human) and Comparative (Across Species; Not Including Ageing, Disorders, and Perceptual Development) Methods Perceptual Development/Experience Philosophical Approaches Physiological Processes Sense Interaction Skin and Body Senses Theoretical Approaches Visual Perception

The Perception of Brightness and Darkness

Author : Leo Maurice Hurvich
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis The Perception of Brightness and Darkness by : Leo Maurice Hurvich

Download or read book The Perception of Brightness and Darkness written by Leo Maurice Hurvich and published by . This book was released on 1966 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Biological Cybernetics Research Trends

Author : Thomas O. Williams
Publisher : Nova Publishers
ISBN 13 : 9781600215681
Total Pages : 230 pages
Book Rating : 4.2/5 (156 download)

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Book Synopsis Biological Cybernetics Research Trends by : Thomas O. Williams

Download or read book Biological Cybernetics Research Trends written by Thomas O. Williams and published by Nova Publishers. This book was released on 2007 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological cybernetics includes experimental, theoretical and application-oriented aspects of information processing in organisms, including sensory, motor, cognitive, and ecological phenomena. Topics covered include: experimental studies of biological systems including quantitative modelling; computational, technical, or theoretical studies with relevance for understanding biological information processing; and artificial implementation of biological information processing and self-organising principles. This book presents important research from around the world in this field.

Human Factors in Simple and Complex Systems, Second Edition

Author : Robert W. Proctor
Publisher : CRC Press
ISBN 13 : 142006360X
Total Pages : 656 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Human Factors in Simple and Complex Systems, Second Edition by : Robert W. Proctor

Download or read book Human Factors in Simple and Complex Systems, Second Edition written by Robert W. Proctor and published by CRC Press. This book was released on 2008-04-22 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: In terms of simple and complex systems, it is a whole new world out there. At the initial publication of this book, fourteen years ago, the web was in its infancy, DVDs did not exist, cell phones were few and far between, and the information superhighway was just a blip upon the horizon. If you used the terms "social engineering," you were most likely a political scientist, and if you were "phishing" you might be listening to a rock band. The second edition of a bestseller, Human Factors in Simple and Complex Systems provides the necessary understanding of the breadth and depth of human factors issues that influence the design, implementation, and evaluation of products and systems. Emphasizing the close relationship between basic theory and application, the authors delineate a framework for the research process, present an integrated view of the current state of knowledge, and examine how these factors can be applied to system design. The new edition addresses such concepts as situation awareness and highlights topics of interest, with a special focus on computer applications and human-computer interaction. See what’s new in the Second Edition New topics, such as situational awareness, that capture the tremendous changes in human factors and ergonomics Tightly integrates basic research and application, strengthening the link between knowledge and practice Each chapter includes a separate box that discusses a topic of current interest related to human interaction with computers and recent technology Demonstrating a general approach to solving a broad range of system problems, the book provides coverage of the theoretical foundation on which the discipline of human factors is built. Structured around human information processing, it covers the full range of contemporary human factors and ergonomics, then shows you how to apply them.

Popular Science

Author :
Publisher :
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4./5 ( download)

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Book Synopsis Popular Science by :

Download or read book Popular Science written by and published by . This book was released on 1971-01 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.

Pioneer Visual Neuroscience

Author : James M. Brown
Publisher : Routledge
ISBN 13 : 1351691155
Total Pages : 182 pages
Book Rating : 4.3/5 (516 download)

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Book Synopsis Pioneer Visual Neuroscience by : James M. Brown

Download or read book Pioneer Visual Neuroscience written by James M. Brown and published by Routledge. This book was released on 2018-09-21 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book honors Naomi Weisstein’s foreshortened span of work published from 1964 to 1992. Naomi Weisstein was a pioneer in the areas we now call visual neuroscience, visual cognition, and cognitive neuroscience. Her enthusiastic pursuit of the mind was infectious, inspiring many others to take up the challenge. Despite her time as an active researcher being cut short, Weisstein’s impact was far reaching and long lasting, and many of her ideas and insights foreshadowed today’s active areas of inquiry into the inner workings of the mind. Comprising contributions from leading scholars in the field, Pioneer Visual Neuroscience outlines Weisstein’s many contributions to the study of visual perception and processing and their effects on the field today. This volume will be of interest to anyone interested in visual perception, visual cognition, and cognitive neuroscience.

Visual Perception

Author : Michael T. Swanston
Publisher : Psychology Press
ISBN 13 : 1135431426
Total Pages : 308 pages
Book Rating : 4.1/5 (354 download)

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Book Synopsis Visual Perception by : Michael T. Swanston

Download or read book Visual Perception written by Michael T. Swanston and published by Psychology Press. This book was released on 2013-02-01 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vision is our most dominant sense, from which we derive most of our information about the world. From the light that enters the eye and the processing in the brain that follows we can sense where things are, how they move and what they are. The first edition of Visual Perception took a refreshingly different approach to perception, starting from the function that vision serves for an active observer in a three-dimensional environment. This fully revised and expanded new edition continues this approach in contrast to the traditional textbook treatment of vision as a catalogue of phenomena. Following a general introduction to the main theoretical approaches, the authors discuss the historical basis of our current knowledge. Placing the study of vision in its historical context, they look at how our ideas have been shaped by art, optics, biology and philosophy as well as psychology. Visual optics and the neurophysiology of vision are also described. The core of the book covers the perception of location, motion and object recognition. There is a new chapter on representation and vision, including a section on the perception of computer generated images. This readable, accessible and truly relevant introduction to the world of perception aims to elicit both independent thought and further study. It will be welcomed by students of visual perception and those with a general interest in the mysteries of vision.

High Dynamic Range Imaging

Author : Erik Reinhard
Publisher : Morgan Kaufmann
ISBN 13 : 0080957110
Total Pages : 673 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis High Dynamic Range Imaging by : Erik Reinhard

Download or read book High Dynamic Range Imaging written by Erik Reinhard and published by Morgan Kaufmann. This book was released on 2010-05-28 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Dynamic Range Imaging, Second Edition, is an essential resource for anyone working with images, whether it is for computer graphics, film, video, photography, or lighting design. It describes HDRI technology in its entirety and covers a wide-range of topics, from capture devices to tone reproduction and image-based lighting. The techniques described enable students to produce images that have a dynamic range much closer to that found in the real world, leading to an unparalleled visual experience. This revised edition includes new chapters on High Dynamic Range Video Encoding, High Dynamic Range Image Encoding, and High Dynamic Range Display Devices. All existing chapters have been updated to reflect the current state-of-the-art technology. As both an introduction to the field and an authoritative technical reference, this book is essential for anyone working with images, whether in computer graphics, film, video, photography, or lighting design. - New material includes chapters on High Dynamic Range Video Encoding, High Dynamic Range Image Encoding, and High Dynammic Range Display Devices - Written by the inventors and initial implementors of High Dynamic Range Imaging - Covers the basic concepts (including just enough about human vision to explain why HDR images are necessary), image capture, image encoding, file formats, display techniques, tone mapping for lower dynamic range display, and the use of HDR images and calculations in 3D rendering - Range and depth of coverage is good for the knowledgeable researcher as well as those who are just starting to learn about High Dynamic Range imaging - The prior edition of this book included a DVD-ROM. Files from the DVD-ROM can be accessed at: http://www.erikreinhard.com/hdr_2nd/index.html

Perceptual Digital Imaging

Author : Rastislav Lukac
Publisher : CRC Press
ISBN 13 : 143986893X
Total Pages : 554 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Perceptual Digital Imaging by : Rastislav Lukac

Download or read book Perceptual Digital Imaging written by Rastislav Lukac and published by CRC Press. This book was released on 2017-12-19 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Visual perception is a complex process requiring interaction between the receptors in the eye that sense the stimulus and the neural system and the brain that are responsible for communicating and interpreting the sensed visual information. This process involves several physical, neural, and cognitive phenomena whose understanding is essential to design effective and computationally efficient imaging solutions. Building on advances in computer vision, image and video processing, neuroscience, and information engineering, perceptual digital imaging greatly enhances the capabilities of traditional imaging methods. Filling a gap in the literature, Perceptual Digital Imaging: Methods and Applications comprehensively covers the system design, implementation, and application aspects of this emerging specialized area. It gives readers a strong, fundamental understanding of theory and methods, providing a foundation on which solutions for many of the most interesting and challenging imaging problems can be built. The book features contributions by renowned experts who present the state of the art and recent trends in image acquisition, processing, storage, display, and visual quality evaluation. They detail advances in the field and explore human visual system-driven approaches across a broad spectrum of applications, including: Image quality and aesthetics assessment Digital camera imaging White balancing and color enhancement Thumbnail generation Image restoration Super-resolution imaging Digital halftoning and dithering Color feature extraction Semantic multimedia analysis and processing Video shot characterization Image and video encryption Display quality enhancement This is a valuable resource for readers who want to design and implement more effective solutions for cutting-edge digital imaging, computer vision, and multimedia applications. Suitable as a graduate-level textbook or stand-alone reference for researchers and practitioners, it provides a unique overview of an important and rapidly developing research field.

An Introduction to Cognitive Psychology

Author : David Groome
Publisher : Psychology Press
ISBN 13 : 9780863776403
Total Pages : 372 pages
Book Rating : 4.7/5 (764 download)

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Book Synopsis An Introduction to Cognitive Psychology by : David Groome

Download or read book An Introduction to Cognitive Psychology written by David Groome and published by Psychology Press. This book was released on 1999 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a comprehensive undergraduate textbook which provides, in a single volume, chapters on both normal cognitive function and related clinical disorder.