Dissertations / Theses on the topic 'Visual grouping'
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Bock, Jacqueline Mary. "Perceptual grouping in visual word recognition." Thesis, University of York, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254606.
Full textTurina, Andreas. "A geometric framework for visual grouping." [S.l. : s.n.], 2002. http://e-collection.ethbib.ethz.ch/ecol-pool/diss/fulltext/eth14919.pdf.
Full textFixmer, Eric Norbert Charles. "Grouping of auditory and visual information in speech." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612553.
Full textChow, Hiu-mei, and 周曉薇. "The effect of perceptual grouping on selective attention." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899946.
Full textpublished_or_final_version
Psychology
Master
Master of Philosophy
Fan, Yu. "A study on audio-visual interaction: How visual temporal cues influence grouping of auditory events." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1544732438004088.
Full textKing, Robert A. "Perceptual grouping selection rules in visual search : methods of sub-group selection in multiple target visual search tasks." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/32821.
Full textPoisson, Marie E. "Studies in visual search : effects of distractor ratio and local grouping processes." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70299.
Full textMcCollough, Andrew Willis 1974. "The Influence of Gestalt Grouping Principles on Active Visual Representations: Neurophysiological Evidence." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/11555.
Full textThe cognitive ability to group information into chunks is a well known phenomenon, however, the effects of chunking on visual representations is not well understood. Here we investigate the effects of visual chunking using Gestalt grouping principles in two tasks: visual working memory change detection and multiple object tracking. Though both these tasks have been used to study cognitive functions in the past, including object-based attention, attentional control and working memory capacity, the effect of grouping on mental representations in these tasks has not been well characterized. That is, while researches have measured effects of grouping on behavioral output in similar tasks, there are few studies of the effects of grouping on neurophysiological indices of object representations. Indeed, these current studies are the first to use event-related potentials (ERPs) to elucidate the effect of grouping on active mental representations of visual stimuli. In the visual working memory task, observers remembered either the color or orientation of pacman stimuli across a delay. We manipulated the collinearity of these objects, whether or not they formed a Kanizsa triangle figure, and measured the behavioral and electrophysiological effects. In the multiple object tracking task, a subset of identical stimuli were briefly cued as targets and then their motion was tracked by participants. We manipulated whether and which Gestalt heuristics were used to bind targets together during their motion and measured the effects on behavior and electrophysiology. In both tasks we compared the grouped to ungrouped conditions. We found that across experiments and tasks behavioral performance was enhanced in grouping conditions compared to ungrouped conditions. Furthermore, the waveforms evoked by grouped stimuli were reduced compared to waveforms produced in response to locally identical but ungrouped stimuli. These data suggest that the mental representation of visual objects may be reshaped moment-by-moment by grouping cues or task demand, giving rise to a flexible, active and dynamic yet parsimonious representation of the visual world.
Committee in charge: Edward K. Vogel, Chair; Edward Awh, Member; Ulrich Mayr, Member; Paul van Donkelaar, Outside Member
Nardoni, Chiara. "Diffusion maps in the Subriemannian motion group and perceptual grouping." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6971/.
Full textAbouzeid, Shadi. "A visual interactive grouping analysis tool (VIGAT) that takes mixed data types as input and provides visually interactive overlapping groups as output." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401309.
Full textLee, Michael P. "THE EFFECTS OF ALTERNATE-LINE SHADING ON VISUAL SEARCH IN GRID-BASED GRAPHIC DESIGNS." UKnowledge, 2014. http://uknowledge.uky.edu/psychology_etds/51.
Full textSova, Jemi, and Bobby Karim. "Visuell hierarki och läsmönster : en studie om kontrast, storlek och positionering." Thesis, Uppsala universitet, Institutionen för informatik och media, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-195423.
Full textThe purpose of this paper is to identify the most effective property of a text or a page to achieve visual hierarchy, which is a tool for getting the desired flow of attention in a page or a web page by giving certain elements a degree of weight in contrast, size and positioning.We want to give an opportunity for further research rather than an absolute conclusion of how it really is. There are more ways to manipulate text to achieve the desired visual hierarchy but we choose the most common. This paper is based on an experiment involving 50 participants with an online questionnaire and three self-made pictures where we will evaluate the results, compare them with other theories and calculate the most effective enhancer of attention. We have also developed a hypothesis on what the results will show. Our study proposes that contrast in color might be the most important factor to achieve and maintain visual hierarchy.
Khayat, Paul. "Attention and eye movements during contour grouping." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2004. http://dare.uva.nl/document/72169.
Full textJacobs, David W. "The Use of Grouping in Visual Object Recognition." 1988. http://hdl.handle.net/1721.1/6967.
Full textYou, Si-shamn, and 游世賢. "A Study on the Effects of Grouping Structure to Visual Identification." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/24506250003025475801.
Full text國立雲林科技大學
工業設計系碩士班
94
The perceptual system of humans to the real world can be broadly classified as “holistic” and “partial” processing. The “holistic” means the object figure upon which the visual sensor will focus while the “partial” means the background that surrounds the main figure. The salience of the object is decided by the stimulus contrast between figure and ground. According to the Gestalt theory, the structure of visual system is mainly decided by the holistic processing rather than the partial processing. This study, based on the grouping theory of Gestalt psychology, will investigate the performance of object identification and target searching. The experiments will focus on the interaction between “shapes of good form”、“low of proximity” and “low of similarity” to different position of object for the performance of target searching, and use the touch screen to show the target figure and select it immediately from the screen. We make use of the compare of reaction time to find out the efficiency of target searching, and know the difference and the influence between both sexes. The results are described as the following: 1.When the subjects search the target figures, they will bear on features of different level changing in the three perceptual theory of Gestalt. 2.The feature variation of figure is more outstanding than the feature variation of ground. Besides, feature variations show different attention and influence level on each other. 3.Subjects will rest on their left or right handed to the tendency of the searching mode.
Liu, Yen-Ting, and 劉彥廷. "Collinear Masking Effect in Visual Search is an Effect of Perceptual Grouping." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/32k2sh.
Full textChuang, Chi-Han, and 莊季翰. "Visual object retrieval via perceptual grouping of image regions using modified generalized Hough transform." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/29077642751633191101.
Full text國立臺灣海洋大學
資訊工程學系
95
This paper presents an object-based image retrieval using a method based on perceptual grouping of image regions using the modified generalized Hough transform. The effectiveness of region-based representation for content-based image retrieval is extensively studied in the literature. One common weakness of the region-based approaches is that the homogeneous image regions have little correspondence to the semantic image concepts, thus, the retrieval results of region-based approaches in terms of regions’ low-level visual features are far from satisfactory. It is desirable and yet remains as a challenge for querying multimedia data by finding an object inside a target image. Given an object model, an added difficulty is that the object might be translated, rotated, and scaled inside a target image. Object segmentation and recognition is the primary step of computer vision for applying to image retrieval of higher-level image analysis. However, automatic segmentation and recognition of objects via object models is a difficult task without a priori knowledge about the shape of objects. Instead of segmentation and detailed object representation, the objective of this research is to develop and apply computer vision methods that explore the structure of an image object by perceptual grouping of image regions to retrieve images from a database. A voting scheme based on generalized Hough transform is proposed to provide object search method, which is invariant to the translation, rotation, scaling of image data, and hence, invariant to orientation and position. Computer simulation results show that the proposed method gives good performance in terms of retrieval accuracy and robustness.
Saam, Mirko [Verfasser]. "Neural models of learning and visual grouping in the presence of finite conduction velocities / by Mirko Saam." 2006. http://d-nb.info/980799422/34.
Full text"Perceptual Organization in Vision: Emergent Features in Two-Line Space." Thesis, 2011. http://hdl.handle.net/1911/70456.
Full textChen, Lihan [Verfasser]. "Crossmodal temporal capture in visual and tactile apparent motion : influences of temporal structure and crossmodal grouping / vorgelegt von Lihan Chen." 2009. http://d-nb.info/1004021852/34.
Full textCastellano, Marta. "Computational Principles of Neural Processing: modulating neural systems through temporally structured stimuli." Doctoral thesis, 2014. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2014121112959.
Full textJeans, Rhiannon. "Form perception and neural feedback: insights from V1 and V2." Thesis, 2014. http://hdl.handle.net/1885/12731.
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