Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Perceptual Grouping"”.
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Can Meaning Associated with Perceptual Grouping Modulate Attention?
… the same frame as a distractor letter (T1). The perceptual groups formed by the specific arrangements of the peripheral elements (face/ non-face), the time interval between T1 and T2 (lag), and the colour (black irrelevant / red relevant) of the peripheral elements were manipulated. The extent to …
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Iterative Tensor Voting for Perceptual Grouping of Natural Shapes in Cluttered Background
Grouping processes provide reliable pre-processed information to higher level computer vision functions by eliminating irrelevant items and preserving salient, organized structures that are more likely to belong to objects. Applications involving object detection or recognition are particularly …
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Higher-dimensional computational models of perceptual grouping and silhouette analysis and representation
… and structural analysis of visual information: perceptual grouping and silhouette analysis and representation. For the problem of perceptual grouping, an intuitive model framework was developed which operates on raw images and locates relevant groupings utilizing a higher dimensional space that …
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Data driven learning for feature binding and perceptual grouping with the Competitive Layer Model
… present work describes the treatment of several grouping or segmentation problems from the field of automatic image processing. It is motivated by natural grouping principles which can be observed in human visual perception, like the Gestalt laws of proximity, similarity and closture. These …
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Bluefish: A Grammar of Discrete Diagrams
… the friend-friend relation in a social network. Perceptual grouping principles – such as spatial proximity, nesting, and linking – are central to reading a discrete diagram. Yet, despite their importance, these principles are typically only implicit when creating one. As a result, a diagram …
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Feature guided pixel matching and segmentation in motion image sequences
… as 3D curves formed by the points using perceptual grouping. The set of feature points in each frame is divided into subsets corresponding to objects moving with different motion, using a measure of motion similarity between feature points.
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How many can you see at a glance? The role of attention in visual enumeration
… Furthermore, the relationship of enumeration to perceptual grouping and item discrimination was explored. In Experiment 2, a dual-task approach was employed in which the amount of attentional resources available to enumeration was systematically modulated by imposing an additional task and by …
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Image segmentation in the wavelet domain using N-cut framework
… By employing the NCut algorithm we solve the perceptual grouping problem of image segmentation which aims at the extraction of the global impression of an image. We capitalize on the reduced set of data to be processed and statistical features derived from the wavelet-transformed images to …
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Comparison of layered surface visualization through animated particles and rocking
… approach has several potential benefits: the perceptual grouping effect of similar motion helps distinguish between markings on separate layers, occlusions are modulated as the markings move, allowing a viewer to assemble an integrated mental image of otherwise partially obscured surfaces, and …
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Distributed thinking across mind and media: creative design in traditional tools and generative design
… from the interplay of mind and media. Crucially, perceptual processing is conceptualized as a central interface that underpins this interplay by linking the mind and media. Through this interface, external representations providing perceptual support interact with internal resources to form and …
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Image segmentation, evaluation, and applications
… measures is most effective at distinguishing perceptually accurate image segmentation from inaccurate segmentation. We then apply these measures to evaluating four state-of-the-art automatic image segmentation algorithms, and establish which best emulates human perceptual grouping. Second, we …
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Top-Down Control of Lateral Interactions in Visual Cortex
… subject to cognitive influences of attention, perceptual task and expectation. Previously it's been shown that the response properties of V1 neurons change to carry more information about behaviorally relevant stimulus features (Li et al. 2004). We hypothesized that top-down modulation of …