Perceiving Complex Objects

DOWNLOAD

Download Perceiving Complex Objects PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Perceiving Complex Objects book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Perceiving Complex Objects

DOWNLOAD
Author : Nina Gaißert
language : en
Publisher: Logos Verlag Berlin GmbH
Release Date : 2011

Perceiving Complex Objects written by Nina Gaißert and has been published by Logos Verlag Berlin GmbH this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Psychology categories.

Das wichtigste Werkzeug des Menschen sind seine Hande. Obwohl dieses Sprichwort schon sehr alt ist, ist nur wenig daruber bekannt, wie und was der Mensch wahrnimmt, wenn er Objekte in die Hand nimmt und betastet. Wie wird die ertastete Form eines Objektes im Gehirn abgespeichert? Ist die haptische Reprasentation ahnlich zu der, der visuellen Wahrnehmung? Entsteht sogar eine multisensorische, und somit gemeinsame, Reprasentation? Diese fundamentalen Fragen bilden den Hintergrund der vorliegenden Dissertation. Die hier dargestellten Experimente zeigen, dass der Mensch sehr ahnliche perzeptuelle Raume generiert, wenn komplexe Formen eines parametrisch definierten Objektraumes visuell oder haptisch exploriert werden. Um dies zu zeigen, wurde zuerst ein dreidimensionaler Objektraum muschelahnlicher Objekte generiert, welche in drei Formparametern variieren. Versuchspersonen wurden in den visuellen Versuchen Fotos oder virtuelle Rekonstruktionen der Objekte gezeigt, wahrend in den haptischen Versuchen 3D Plastikmodelle der Objekte, generiert mit einem 3D Drucker, mit verbundenen Augen betastet wurden. In einer ersten Reihe von Experimenten bewerteten die Versuchspersonen die Ahnlichkeit zweier, nacheinander gezeigter, Objekte. Mit diesen Ahnlichkeitsbewertungen und mit Hilfe des Verfahrens der multidimensionalen Skalierung wurden die perzeptuellen Raume beider Modalitaten visualisiert. Uberraschenderweise konnten die Versuchspersonen die Topologie des Objektraumes korrekt nachbilden, unabhangig davon, ob sie die Objekte gesehen oder betastet hatten. Weiterhin zeigten die Ergebnisse, dass der visuelle und der haptische perzeptuelle Raum fast identisch waren. Als nachstes wurden drei Kategorisierungsexperimente durchgefuhrt. Obwohl Kategorisierung allein durch den Tastsinn eher eine ungewohnliche Aufgabe ist, konnte sie genauso gut gelost werden, wie wenn die Versuchspersonen die Objekte sehen konnten. Anschliessend wurden die perzeptuellen Raume beider Modalitaten mit den Ergebnissen der Kategorisierungsexperimente verglichen. Fur alle Kategorisierungsexperimente und fur beide Modalitaten war die wahrgenommene Ahnlichkeit zwischen Objekten einer Kategorie hoher, als die Ahnlichkeit zweier Objekte aus unterschiedlichen Kategorien. Das heisst, dass, sowohl visuell als auch haptisch, Objekte in einer Kategorie zusammengruppiert wurden, die als sehr ahnlich wahrgenommen wurden.Um zu untersuchen, inwieweit die auf den computergenerierten Objekten basierenden Ergebnisse auf naturliche Objekte ubertragbar sind, wurde eine Sammlung von Muscheln und Salzwasserschnecken erstellt. Mit diesen wurden, wie oben beschrieben, Ahnlichkeitsbewertungen durchgefuhrt und mittels multidimensionaler Skalierung die perzeptuellen Raume visualisiert. Wiederum waren der visuelle und der haptische perzeptuelle Raum fast identisch. Interessanterweise konnte man in beiden Raumen eine Gruppenbildung erkennen, weshalb auch hier drei Kategorisierungsexperimente durchgefuhrt wurden. Obwohl die Muscheln in einer Vielzahl an Objektmerkmalen variierten, z.B. Form, Farbe, Muster etc., konnten die Versuchspersonen diese Aufgabe ohne Muhe losen, auch wenn sie die Objekte nur betasten durften. Zusatzlich konnte die Gruppenbildung, die schon in den perzeptuellen Raumen erkennbar war, die Kategorisierungsergebnisse richtig vorhersagen.Zusammengenommen weisen diese Ergebnisse darauf hin, dass die visuelle und die haptische Reprasentation von Objekten sehr eng miteinander verknupft sein mussen. Zusatzlich liefern die Experimente Hinweise darauf, dass die gleichen Prozesse genutzt werden, wenn Ahnlichkeiten zwischen Objekten wahrgenommen werden, oder Objekte kategorisiert werden, egal ob die Objekte visuell oder haptisch exploriert werden.

Complex Object And Scene Perception

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1999

Complex Object And Scene Perception written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

The goal of the research was to understand the role of contextual constraint in the visual analysis of complex, natural scenes. This issue bears directly on the basic architecture of the human visual system and has implications for the design of artificial vision systems devoted to object and scene analysis. Two hypotheses were considered: (1) Scene constraint influences the perceptual identification of individual objects; and (2) Scene constraint influences only post-identification object analysis. The main results of the research support the first hypothesis: Scene constraint does not directly influence perceptual analysis of component objects in human vision. Other results from the research supports the conclusion that semantic information is not used to drive initial eye movements in a scene, but does influence initial fixation time in a region and region refixation probability. Based on these results. a model of scene analysis was developed in which object identification is functionally isolated from scene meaning and gaze control is initially independent of scene semantics but becomes sensitive to meaning as scene perception unfolds over time. Continuing work is currently aimed at testing this model in human vision and gaze control, and implementing an artificial gaze control system on a working robot platform using a Markov Decision Process framework.

Eye Movements And Vision

DOWNLOAD
Author : A. L. Yarbus
language : en
Publisher: Springer
Release Date : 2013-11-11

Eye Movements And Vision written by A. L. Yarbus and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Medical categories.

Aristotle On Perceiving Objects

DOWNLOAD
Author : Anna Marmodoro
language : en
Publisher: Oxford University Press, USA
Release Date : 2014

Aristotle On Perceiving Objects written by Anna Marmodoro and has been published by Oxford University Press, USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Philosophy categories.

"Marmodoro's monograph engages with Aristotle's views on a philosophically challenging question regarding perception, which has been central in the history of philosophy and is very much the focus of current debates in a number of philosophical and psychological disciplines: How do we become perceptually aware of objects in the world? Despite the significance of the question, the ways in which ancient philosophers have addressed it have only just begun to be be explored. There is a great wealth of insight on this question to be found in Aristotle, regarding our ability to perceive items in our environment, which he develops through his very demanding metaphysics, and Marmodo explores these insights in depth here. Aristotle's attempts at accounting for our awareness of complex perceptual content were highly original, drawing on and building on the metaphysics he has developed elsewhere in his works, but have not been adequately explored to date"--

Conjunctive Coding Of Complex Object Features

DOWNLOAD
Author : Jonathan Erez
language : en
Publisher:
Release Date : 2015

Conjunctive Coding Of Complex Object Features written by Jonathan Erez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Critical to perceiving an object is the ability to bind its constituent features into a cohesive representation, yet the manner by which the visual system integrates object features to yield a unified percept remains unknown. Another important aspect of object perception is the ability to represent complex objects across different viewing angles, despite the drastic variability in appearance caused by shifting viewpoints. This dissertation describes a novel application of multivoxel pattern analysis (MVPA) of neuroimaging data that allows a direct investigation of whether neural representations integrate object features into a whole that is different from the sum of its parts and whether these representations are view invariant. Results showed that patterns of activity throughout the ventral visual stream (VVS), extending anteriorly into the perirhinal cortex (PRC), discriminated between the same sets of features when combined into different objects. Despite this sensitivity to the unique conjunctions of features, this activity was invariant to the viewpoints from which the conjunctions were presented. These results suggest that the manner in which our visual system processes complex objects depends on the explicit coding of the feature conjunctions comprising them, and that these representations are invariant to large changes in visual appearance caused by shifting viewpoints. To test whether experience with the objects changed the pattern of conjunctive representations across the VVS, participants were scanned in a separate fMRI study following an extensive behavioural training period. Results showed that both view-dependent and view-invariant conjunctive representations shifted to more posterior regions of the VVS, suggesting that training affected how unique feature conjunctions are represented across the VVS. These results support the representational-hierarchical view of cortical organization and contribute to our understanding of object perception and memory.

Perception

DOWNLOAD
Author : John M. Wilding
language : en
Publisher: Routledge
Release Date : 2017-03-16

Perception written by John M. Wilding and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-03-16 with Psychology categories.

Originally published in 1982, this book introduces the student to the central problem of all perceptual theories: just how does the perceiver identify particular objects? In focusing on the problem, Dr Wilding provides a coherent, well organized framework for its study, bypassing the conventional split between perception and reaction time evidence which was common to most textbooks at the time. The author draws on evidence from a wider number of research traditions and argues that each has a contribution to make to any account of perception. Throughout he emphasizes the methodological basis of the research discussed, in order to provide students with a solid foundation for their own practical work.

Problems In Depth Perception

DOWNLOAD
Author : Walter Charles Gogel
language : en
Publisher:
Release Date : 1965

Problems In Depth Perception written by Walter Charles Gogel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Depth perception categories.

Neuronal Correlates Of Complex Object And Color Perception

DOWNLOAD
Author : Sophia Charlotte Nestmann
language : en
Publisher:
Release Date : 2021

Neuronal Correlates Of Complex Object And Color Perception written by Sophia Charlotte Nestmann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.

Handbook Of Perception And Action

DOWNLOAD
Author : Wolfgang Prinz
language : en
Publisher: Elsevier
Release Date : 1996-04-19

Handbook Of Perception And Action written by Wolfgang Prinz and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-04-19 with Science categories.

This volume combines the classical fields of perception research with the major theoretical attitudes of today's research, distinguishing between experience- versus performance-related approaches, transformational versus interactional approaches, and approaches that rely on the processing versus discovery of information. Perception is separated into two parts. The first part deals with basic processes and mechanisms, and discusses early vision and later, yet still basic, vision. The second covers complex achievements with accounts of perceptual constancies and the perception of patterns, objects, events, and actions. Gives an overview of the current status of research in classical areas and of current approaches to perception Covers research areas and theoretical approaches Combines American and European research Emphasizes complex achievements of perception: auditory patterns, object identification, event perception, and perception of action

Object Perception

DOWNLOAD
Author : Bryan E. Shepp
language : en
Publisher: Psychology Press
Release Date : 2013-04-15

Object Perception written by Bryan E. Shepp and has been published by Psychology Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-15 with Psychology categories.

This collection of research on object perception focuses on holistic and featural properties of objects, the mechanisms that produce such properties, how people choose one type of property over another, and how such choices are improved during the course of child development. The contributions consider alternative perceptual characterizations, the way in which such properties are represented in the mind, how particular properties are more useful in some kinds of tasks that humans perform, and how the developing child learns to cope with different properties in choosing among alternatives to optimize task performance. These papers were written by specialists for specialists in experimental, cognitive, and developmental psychology.