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 20 of 26 for “"visual signals"”.
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Saliency in audio and visual signals
… saliency and its applications in audio and visual signals. For each portion of the signal, its saliency means the likelihood of attracting bottom-up attention in the perception process. In computer vision, image saliency is described by local contrasts of features. Each local patch is …
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A Bayesian Fusion Approach and Its Application to Integrating Audio and Visual Signals in HCI
… nonlinear or high-order correlations between signals from two sources. Kernel CCA uses kernel principal component analysis (PCA), which elegantly combines a nonlinear transformation and linear PCA into a one-step calculation, so as to avoid the computational burden of high/infinite-dimensional …
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New objective and psychophysical techniques to study the processing of visual signals with emphasis on chromatic afterimages
… noise technique was used to isolate colour signals and to elicit pupil responses to coloured stimuli of known photoreceptor contrast. A model was developed to explain the afterimage results obtained in the normal trichromats and in colour deficient subjects. The model and the pupil colour …
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The development of conversational and communication skills
… of 6 years and less do not adapt to the loss of visual signals in audio-only communication, and their performance suffers. Both the structure of children's dialogues and their use of visual signals were found to differ from that of adults. It is concluded that both verbal and non-verbal …
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Os índios kambiwá de Pernambuco: arte e identidade étnica
… and the indumentary utilization of certain " visual signals " normally recognized by the group and/or "public opinion" as indian ethnic attributes.
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Behavioral Measures and Ecological Correlates of Vision in Poeciliid Fishes
… how animals see the world and how visual systems have evolved to meet the needs of particular animals are major goals of visual ecology research. The Poeciliidae are a diverse family of Neotropical freshwater fishes and are excellent models for visual ecology research given …
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Towards Integrated Audio-Visual Learning: From Vision-to-Audio Generation to a Unified Audio-Visual Framework
The interplay between audio and visual signals, rich in correlations across various scales, significantly impacts human perception and drives a consistent demand for audio-visual applications across fields such as video production, animation, and virtual reality. Historically, the creation and …
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VISUAL LOCALIZATION ACCURACY DETERMINES THE BIAS OF AUDITORY TARGETS IN AZIMUTH AND DEPTH
Visual bias is a psychophysical phenomenon where an accurately localized signal, such as a light, will bias a spatially discrepant signal that is localized with less accuracy, such as a sound, when the two signals are perceived as unified. Many previous studies have demonstrated visual bias in …
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Sources and Correlates of Performance Enhancement in Audiovisual Speech Perception
… results from the integration of auditory and visual signals, but the underlying mechanisms remain largely unknown. This thesis describes the results from four studies investigating the enhancement of speech comprehension in an open-set, word-in-noise identification task. In the first study, we …
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PERSUASION IN REWARD-BASED CROWDFUNDING: THE ROLE OF VISUAL IMAGE
… (Childers & Houston, 1984), the research about visual information and text-picture integration is missing. Take restaurant reward-based CF as an example, this research is designed to fill the research voids by answering to the following research questions: (1) What are the major themes of visual …
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Visual analysis and synthesis with physically grounded constraints
… approaches often treat the images as pure 2D signals and not as a 2D projection of the physical 3D world. As a result, a lot of training examples are required to cover sufficiently diverse appearances and inevitably suffer from limited generalization capability. In this thesis, I propose …
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Lean principles applied to a supply chain with demand uncertainty
… This work includes the use of tools such as visual signals, cellular manufacturing, Kanbans, Heijunka boards, etc. The work performed over the internship sets the foundation for the transformation of the Kodak supply chain into a lean supply chain capable of dealing with uncertain demand. …
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From Structured Document To Structured Knowledge
… the significance of layout structure and visual signals. Modeling such structures is essential for a comprehensive understanding of these documents. This thesis presents novel algorithms for extracting structured knowledge from structured documents. First, we propose GraphIE, an …
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Multimodal Human Behavior Modeling: From Understanding to Generation
… First of all, I develop the first audio-visual egocentric gaze anticipation model that forecasts gaze behaviors by fusing audio-visual streams in temporal and spatial dimensions separately. Second, I collect a multimodal social interaction dataset with detailed annotations, and analyze …
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Bottom-up and Top-down Mechanisms of Visually-Guided Movements
… By making saccades 2-3 times/second, we scan visual scenes and integrate the incoming visual signals to construct an internal representation of what is around us. Much is still unknown about the neural processes that act on visual input and the nature of the resulting internal construct. To …
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Behavioural and ecological interactions between Heliconius butterflies, their predators and host plants
… These tropical butterflies have impressive visual signals, which are under conflicting selection pressures, as they are used in choosing potential mates and defending against visual predators through aposematic coloration. As both selection pressures are likely to be strong, different …
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Spatial properties of photophobia
… cells; hence the magnocellular and koniocellular visual pathways are implicated as channeling the visual signals that eventually give rise to photophobia.</p>
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Movement Function Follows Spatial Form: Coordinate System Implications for Online Visual Feedback Control of the Hand
Closed loop visual feedback control of the hand is essential for accurate reaching movements. Without visual signals of either the hand or target position, reaches are inaccurate and imprecise; therefore the brain uses a relative positional signal to control movements online. Previous studies …
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The effects of flooding disturbance on the distribution and behaviour of riparian arthropods along a lowland gravel river
… relied more on individual information (e.g. visual signals) and showed a higher degree of behavioural plasticity. This might increase the beneficiality of flood-avoiding behaviour. By using Amplified Fragment Length Polymorphism (AFLP) markers, the genetic population structure of the highly …
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The Role of Experience in the Human Perception of Emotion in Dogs
… of emotion in dogs using the dogs' visual signals (body language). First, a set of 30 short videos of dogs was assembled, and a panel of eight behavioral experts provided ratings and categorizations of the depicted dogs' emotions. Based on the emotional valence and level of agreement …
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