Motion Segmentation
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Video segmentation based on motion coherence of particles in a video sequence
This work describes an approach for object-oriented video segmentation based on motion coherence. Using a tracking process based on adaptively sampled points (namely, particles), 2-D motion patterns are identified with an ensemble clustering approach. Particles are clustered to obtain a pixel-wise segmentation in space and time domains. The segmentation resu
Publicado em: 2011
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2. Mimetic finite difference methods in image processing
We introduce the use of mimetic methods to the imaging community, for the solution of the initial-value problems ubiquitous in the machine vision and image processing and analysis fields. PDE-based image processing and analysis techniques comprise a host of applications such as noise removal and restoration, deblurring and enhancement, segmentation, edge det
Computational & Applied Mathematics. Publicado em: 2011
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3. Segmentação de movimento usando morfologia matemática / Motion segmentation using mathematical morphology
Esta dissertação apresenta um novo método de segmentação de movimento baseado na obtenção dos contornos e em filtros morfológicos. A nova técnica apresenta vantagens em relação ao número de falsos positivos e falsos negativos em situações específicas quando comparada às técnicas tradicionais.
Publicado em: 2007
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4. Segmentação fuzzy de imagens e vídeos
Image segmentation is the process of subdiving an image into constituent regions or objects that have similar features. In video segmentation, more than subdividing the frames in object that have similar features, there is a consistency requirement among segmentations of successive frames of the video. Fuzzy segmentation is a region growing technique that as
Publicado em: 2007
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5. Perseguição de marcadores para analise de movimentos humanos
In this work we consider the problem of tracking human movements. The interest for this problem concerns the analysis and recognition of human motion used in a variety of applications, such as clinical gait analysis, improvement of the human performance in sports, ergonomics, choreography of dance, and so on. In particular, we treat this problem using marker
Publicado em: 1998
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6. Psychophysical evidence for fast region-based segmentation processes in motion and color.
Theories of image segmentation suggest that the human visual system may use two distinct processes to segregate figure from background: a local process that uses local feature contrasts to mark borders of coherent regions and a global process that groups similar features over a larger spatial scale. We performed psychophysical experiments to determine whethe
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7. Activity patterns in human motion-sensitive areas depend on the interpretation of global motion
Numerous imaging studies have contributed to the localization of motion-sensitive areas in the human brain. It is, however, still unclear how these areas contribute to global motion perception. Here, we investigate with functional MRI whether the motion-sensitive area hMT+/V5 is involved in perceptual segmentation and integration of motion signals. Stimuli w
The National Academy of Sciences.
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8. Visual Field Maps, Population Receptive Field Sizes, and Visual Field Coverage in the Human MT+ Complex
Human neuroimaging experiments typically localize motion-selective cortex (MT+) by contrasting responses to stationary and moving stimuli. It has long been suspected that MT+, located on the lateral surface at the temporal–occipital (TO) boundary, contains several distinct visual field maps, although only one coarse map has been measured. Using a novel fun
American Physiological Society.
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9. Quantization of continuous arm movements in humans with brain injury
Segmentation of apparently continuous movement has been reported for over a century by human movement researchers, but the existence of primitive submovements has never been proved. In 20 patients recovering from a single cerebral vascular accident (stroke), we identified the apparent submovements that composed a continuous arm motion in an unloaded task. Ki
The National Academy of Sciences.
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10. Toward detecting and identifying macromolecules in a cellular context: Template matching applied to electron tomograms
Electron tomography is the only technique available that allows us to visualize the three-dimensional structure of unfixed and unstained cells currently with a resolution of 6–8 nm, but with the prospect to reach 2–4 nm. This raises the possibility of detecting and identifying specific macromolecular complexes within their cellular context by virtue
The National Academy of Sciences.