Download or read book Adaptation of Color Salience Contingent Upon Global Form Coding and Task Relevance in Color based Visual Search written by Brian A. Goolsby and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive research on local color aftereffects has revealed perceptual consequences of opponent color coding in the retina and the LGN, and of orientation-/spatial-frequency-contingent color coding in early cortical areas (e.g., V1 and V2). This dissertation reports investigations of a novel color aftereffect observed in color-based visual search that depends critically on global-form-contingent color processing, but is not critically affected by changes in local image features.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Cognitive Neuroscience of Attention written by Joseph B. Hopfinger and published by Routledge. This book was released on 2020-12-17 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Attention refers to our ability to selectively process the vast array of stimuli impinging upon our senses at every moment. The mental processes of attention are critical for allowing us to maintain focus and complete tasks efficiently, even within distracting environments. The brain mechanisms of attention have been studied for decades, yet much still remains unknown, and consensus on core issues remains elusive. A unique aspect of this book are chapters that highlight recent debates on critical issues in attention research. Each of these chapters includes a comprehensive discussion paper that is followed by peer commentaries and an authors' responses. These debates include whether attention can modulate activity of even the earliest cortical processing region and whether changes in white matter are critical for plasticity-related effects of attention training. In addition to these discussion chapters, the book presents cutting-edge research on some of the newest theories of attentional control and selective attention, including the influence of practice, epigenetics, reward, social interaction, and distractor suppression. These studies employ advanced cognitive neuroscience methods such as neurostimulation, functional neuroimaging pattern analysis, and the evaluation of oscillatory brain activity to shed light on the brain mechanisms underlying attention. The chapters in this book were originally published as articles in various issues of the journal Cognitive Neuroscience.
Download or read book The semantics of Color Sharing The Laboratory with Color Vision written by Lucia Ronchi and published by Lucia Ronchi. This book was released on 2014-04-01 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colour and Form Perception Straddling the Boundary written by Galina V. Paramei and published by Frontiers Media SA. This book was released on 2016-05-31 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Starting from psychophysics, over the last 50 years, most progress in unravelling the mechanisms of color vision has been made through the study of single cell responses, mainly in LGN and striate cortex. A similar development in the study of form perception may seem to be underway, centred on the study of temporal cortex. However, because of the combinatorial characteristics of form perception, we are also observing the opposite tendency: from single-cell activity to population coding, and from static receptive field structures to system dynamics and integration and, ultimately, a synthetic form of psychophysics of color and form perception. From single cells to system integration: it is this development the present Research Topic wishes to highlight and promote. How does this development affect our views on the various attributes of perception? In particular, we are interested in to what extent evolving knowledge in the field of color perception is relevant within a developing integrative framework of form perception. The goal of this Research Topic is to bring together experimental research encompassing both color and form perception. For this volume, we planned a broad scope of topics – on color in complex scenes, color and form, as well as dynamic aspects of form perception. We expect that the Research Topic will be attractive to the community of researchers whose work straddles the boundary between the two visual perception fields, as well as to the wider community interested in integrative/systems neuroscience.
Download or read book Digital Color written by Christine Fernandez-Maloigne and published by John Wiley & Sons. This book was released on 2013-02-07 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book the authors identify the basic concepts and recent advances in the acquisition, perception, coding and rendering of color. The fundamental aspects related to the science of colorimetry in relation to physiology (the human visual system) are addressed, as are constancy and color appearance. It also addresses the more technical aspects related to sensors and the color management screen. Particular attention is paid to the notion of color rendering in computer graphics. Beyond color, the authors also look at coding, compression, protection and quality of color images and videos. Individual chapters focus on the LMS specification, color constancy, color appearance models, rendering in synthetic image generation, image sensor technologies, image compression, and quality and secure color imaging. Ideal for researchers, engineers, Master’s and PhD students, Digital Color: Acquisition, Perception, Encoding and Rendering offers a state of the art on all the scientific and technical issues raised by the different stages of the digital color process – acquisition, analysis and processing. Contents 1. Colorimetry and Physiology – The LMS Specification, Françoise Viénot and Jean Le Rohellec. 2. Color Constancy, Jean-Christophe Burie, Majed Chambah and Sylvie Treuillet. 3. Color Appearance Models, Christine Fernandez-Maloigne and Alain Trémeau. 4. Rendering and Computer Graphics, Bernard Péroche, Samuel Delepoulle and Christophe Renaud. 5. Image Sensor Technology, François Berry and Omar Ait Aider. 6. From the Sensor to Color Images, Olivier Losson and Eric Dinet. 7. Color and Image Compression, Abdelhakim Saadane, Mohamed-Chaker Larabi and Christophe Charrier. 8. Protection of Color Images, William Puech, Alain Trémeau and Philippe Carré. 9. Quality Assessment Approaches, Mohamed-Chaker Larabi, Abdelhakim Saadane and Christophe Charrier.
Download or read book Color Coding Effects on Human Performance written by Ellen Barker and published by . This book was released on 1977 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Color Image Processing and Analysis written by Christine Fernandez-Maloigne and published by Springer Science & Business Media. This book was released on 2012-07-11 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume does much more than survey modern advanced color processing. Starting with a historical perspective on ways we have classified color, it sets out the latest numerical techniques for analyzing and processing colors, the leading edge in our search to accurately record and print what we see. The human eye perceives only a fraction of available light wavelengths, yet we live in a multicolor world of myriad shining hues. Colors rich in metaphorical associations make us “purple with rage” or “green with envy” and cause us to “see red.” Defining colors has been the work of centuries, culminating in today’s complex mathematical coding that nonetheless remains a work in progress: only recently have we possessed the computing capacity to process the algebraic matrices that reproduce color more accurately. With chapters on dihedral color and image spectrometers, this book provides technicians and researchers with the knowledge they need to grasp the intricacies of today’s color imaging.
Download or read book Color and Adaptation in Visual Search and Perceptual Organization written by Gokhan Malkoc and published by . This book was released on 2000 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimal Color Coding for a Visual Search Task written by Robert C. Carter (Jr) and published by . This book was released on 1972 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Color Constancy written by Marc Ebner and published by John Wiley & Sons. This book was released on 2007-06-05 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: A human observer is able to recognize the color of objects irrespective of the light used to illuminate them. This is called color constancy. A digital camera uses a sensor to measure the reflected light, meaning that the measured color at each pixel varies according to the color of the illuminant. Therefore, the resulting colors may not be the same as the colors that were perceived by the observer. Obtaining color constant descriptors from image pixels is not only important for digital photography, but also valuable for computer vision, color-based automatic object recognition, and color image processing in general. This book provides a comprehensive introduction to the field of color constancy, describing all the major color constancy algorithms, as well as presenting cutting edge research in the area of color image processing. Beginning with an in-depth look at the human visual system, Ebner goes on to: examine the theory of color image formation, color reproduction and different color spaces; discuss algorithms for color constancy under both uniform and non-uniform illuminants; describe methods for shadow removal and shadow attenuation in digital images; evaluate the various algorithms for object recognition and color constancy and compare this to data obtained from experimental psychology; set out the different algorithms as pseudo code in an appendix at the end of the book. Color Constancy is an ideal reference for practising engineers, computer scientists and researchers working in the area of digital color image processing. It may also be useful for biologists or scientists in general who are interested in computational theories of the visual brain and bio-inspired engineering systems.
Download or read book Goal Directed Visual Search Based on Color Cues written by Vishal S. Vaingankar and published by . This book was released on 2004 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigates the process of goal directed visual search based on color cue. The computational model generates saliency maps that predict the locations of interest during a visual search. The analysis provides a measure of how well human eye movements correspond with the predicted locations of the saliency maps.
Download or read book Practice and Prior Knowledge of Color as Redundant Code in a Visual Search Task written by Lawrence Joseph Najjar and published by . This book was released on 1983 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cognition Through Color written by Jules B. Davidoff and published by MIT Press (MA). This book was released on 1991 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: A century ago phrenologists described a "bump" for color located just over the eyebrow. Today's modular approach to the organization of the visual cortex is more sophisticated, yet it still holds that there are brain areas dedicated solely to particular aspects of perception. "Cognition through Color "reviews the current status of investigations of color cognition from the standpoint of modern neuropsychology. It provides clear evidence, based on a large body of empirical study that includes the author's own work on color perception and naming, that color appears to be one of the basic building blocks or modules from which perception is constructed and our memories organized. Davidoff systematically relates this evidence to an explicit model of color cognition from sensation through functional role to naming.The original impetus for "Cognition through Color "came from the investigation of individuals with brain damage. There are, for example, patients who have difficulty in naming colors. More important, despite normal color vision, memory for colors can be "split off" from all aspects of memory for shapes and objects, providing a strong case for the notion of modularity in vision.Davidoff shows that to understand how color is remembered, we must know how objects are recognized. He observes that the perception of what we call color is, in essence, the study of the surface properties of objects, and he develops a model in which the mental representations for color can be linked to the knowledge of objects. Throughout he emphasizes detailed critical analysis of experimental data in light of current theories of both perception and cognition.
Download or read book Colour and Form Perception Straddling the Boundary written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Starting from psychophysics, over the last 50 years, most progress in unravelling the mechanisms of color vision has been made through the study of single cell responses, mainly in LGN and striate cortex. A similar development in the study of form perception may seem to be underway, centred on the study of temporal cortex. However, because of the combinatorial characteristics of form perception, we are also observing the opposite tendency: from single-cell activity to population coding, and from static receptive field structures to system dynamics and integration and, ultimately, a synthetic form of psychophysics of color and form perception. From single cells to system integration: it is this development the present Research Topic wishes to highlight and promote. How does this development affect our views on the various attributes of perception? In particular, we are interested in to what extent evolving knowledge in the field of color perception is relevant within a developing integrative framework of form perception. The goal of this Research Topic is to bring together experimental research encompassing both color and form perception. For this volume, we planned a broad scope of topics - on color in complex scenes, color and form, as well as dynamic aspects of form perception. We expect that the Research Topic will be attractive to the community of researchers whose work straddles the boundary between the two visual perception fields, as well as to the wider community interested in integrative/systems neuroscience.
Download or read book Changes in Color Guidance Over the Course of a Complex Visual Search written by Ryan Papargiris and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: When searching for an object, we store a mental representation of the target, which guides our search through the use of attention. The effectiveness of this search guidance varies depending on the task and the relationship between target and distractors. With a better understanding of how search guidance changes over time within a trial, we can better compare the differences between experimental conditions. Eye tracking data from a variety of search tasks were analyzed to determine how color guidance varied over the course of the trial. Color guidance for a given fixation was evaluated based on the distance in color space between the nearest object and the target color. These color differences were averaged over all of the trials and plotted based on when the fixation occurred in the trial. The results indicate that color guidance does not begin working at maximum effectiveness immediately. As the trial progresses, the average color difference decreases. After this initial decrease, if the target is not present, guidance becomes less selective and target dissimilar distractors are increasingly fixated. The color distance graphs were compared between experiments to reveal significant differences arising from the experimental conditions.
Download or read book Display Color Coding for a Visual Search Task written by Sidney L. Smith and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: N analysis is pr sent d which describes the results of an experimental study of the effects of display color coding on visual search time. Twelve subjects each viewed a series of 300 displays, which varied in display density, in number of colors used, in the particular color of the target, with either a white or black backgrou d, u d r condi ions wher the subject either knew the color of the target in advance, or did not. Neither the particular color of the target nor the display background had any significant effect on search time. Search time increased regularly with increasing display density. For multicolored displays, when e color of the target was known in advance, search times were considerably shorter than when the target color was unknown. When the color of the target was unknown, search times were not sig ificantly iff rent than those for single-colored displays. Author).
