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 34 for “"HVS"”.
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Wavelet-based Image Compression Using Human Visual System Models
… the sensitivities of the human visual system (HVS) are often not incorporated into compression schemes. This paper develops new wavelet models of the HVS and illustrates their performance for various scalar wavelet and multiwavelet transforms. The performance is measured quantitatively (PSNR) …
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A FEATURES EXTRACTION WRAPPER METHOD FOR NEURAL NETWORKS WITH APPLICATION TO DATA MINING AND MACHINE LEARNING
… in the Heuristic for Features Selection (HVS) method. The HVS technique is a neural network based features selection technique that uses the weights of a well-trained neural network as relevance index for each input feature with respect to the target. The HVS technique consumes long …
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Addressing the needs of children under ‘universal’ and ‘vulnerable’ caseloads – a psychosocial case study of health visitors within an inner London borough
The health visiting service (HVS) offers preventative ‘universal’ and ‘enhanced’ services, and remains the most cost-effective method of providing early support to families to reduce inequalities and enhance outcomes for children (Department of Health and Department for Children Schools and …
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Experimental Investigation of Turbulent Flows at Smooth and Rough Wall-Cylinder Junctions
… of junction flows: the horseshoe vortex system (HVS). Focusing on turbulent flows, the complex dynamics of the HVS is established through its unsteadiness and non-uniformity. The fundamentals of this dynamically-rich phenomenon have been described within the body of a rapidly-expanding …
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Moving on from ‘Listening Visits’: a mixed methods, multi-phase study exploring the support that health visitors provide to mothers with mental health problems
… the health of two generations. Health visitors (HVs) have routine contact with all mothers during the perinatal period and, since 1989, have been providing an intervention described as ‘listening visits’ (LVs) to mothers with postnatal depression. When the NICE guideline for antenatal and …
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A human spatial-chromatic vision model for evaluating electronic displays
… veridical models of the human visual system (HVS), including multi-channel models of spatial vision, the zone theory of color vision, physiological models of retinal processes, and models of the optics of the eye. A display evaluation system consisting of the HVS model used in conjunction with …
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Image usefulness of compressed surveillance footage with different scene contents
… utilising: 1) the human visual system (HVS) for a face recognition task, 2) automated face recognition systems, and 3) automated human detection systems. These systems (HVS and automated) were assessed with defined scene content properties, and video compression, i.e. H.264/MPEG-4 AVC. …
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Cortical Eeg Following Bilateral Lateral Hypothalamic Damage: Effects of Drugs Acting on Some Components of the Reticular Formation (Hippocampus, Animal-Model, Pharmacology)
… cortical EEG of high voltage and slow waves (HVS) all the time. The failure to maintain cortical low voltage and fast EEG (LVF) as the normal rat does, may reflect disruption of some neurotransmitter components of the reticular formation known to contribute to cortical LVF-activation. The …
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Content-prioritised video coding for British Sign Language communication.
… based on a general model of Human Visual System (HVS) sensitivities. This thesis presents novel video image coding methods developed to achieve the conflicting requirements for high image quality and efficient coding. Novel methods of prioritising visually important video image content for …
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Prediction of permanent deformations in asphalt concrete using the mechanistic-empirical pavement design guide
… pavements with the Heavy Vehicle Simulator (HVS), specimen production, laboratory testing of materials, and calculation of permanent deformations using the M-E PDG software v0.910. Field calibration factors were assessed in order to match the model’s results with the HVS results. It was also …
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Noise-Enhanced and Human Visual System-Driven Image Processing: Algorithms and Performance Limits
… resonance (SR) noise and human visual system (HVS) properties, where several novel frameworks and algorithms for object detection in images, image enhancement and image segmentation as well as the method to estimate the performance limit of image segmentation algorithms are developed.</p> …
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A computational model of visual attention.
… is a process by which the Human Visual System (HVS) selects most important information from a scene. Visual attention models are computational or mathematical models developed to predict this information. The performance of the state-of-the-art visual attention models is limited in terms of …
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A Study of Perceptually Tuned, Wavelet Based, Rate Scalable, Image and Video Compression
… Function (CSF) for Human Visual System (HVS) and extends this scheme to handle optimal bit allocation among multiple bands, such as Y, Cb, and Cr. Our experimental image codec shows very exciting results in compression performance and visual quality comparing to the new wavelet based …
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Image Compression Using Balanced Multiwavelets
… effect of incorporating a human visual system (HVS)-based transform model in our multiwavelet compression scheme. Our results indicate those multiwavelet properties that are most important to image compression. Moreover, the PSNR and subjective quality results depict similar performance for the …
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Finding the "Scot" in the Scottish-American: An Investigation of Scottish Identity through Mitochondrial DNA and Y-chromosome Markers
… Of the study's participants, 60 percent shared HVS-I haplotypes with Scotland. However, analyses based on Tajima and Nei's distances indicated that these haplotypes are found throughout Europe due to historical migrations. Seventy-seven percent of males shared a haplotype with Scotland based on …
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Analytics of endocrine disrupting chemicals in environmental matrices
… van deze hormoonverstorende stoffen (HVS) in verschillende complexe matrices beschreven. Verder ook wordt er ook een overzicht gegeven van het voorkomen van deze stoffen in een estuarien ecosysteem zoals het Schelde estuarium (België-Nederland). In hoofdstuk I wordt een inleiding …
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SAFE REINFORCEMENT LEARNING-BASED GREEN LIGHT OPTIMAL SPEED ADVISORY FOR MIXED-TRAFFIC PLATOONS
… against unobservable Human-driven Vehicles (HVs), we use the concept of privileged information to train the RL agent. Specifically, we leverage both HV and CAV information to train the RL agent while retaining access to only CAV information during implementation. Third, we integrate Control …
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Low complexity in-loop perceptual video coding
… efficient, in contrast the Human Visual System (HVS) has non-uniform sensitivity based upon lighting, edges and textures. Existing perceptual assessments, are natively incompatible and processor demanding, making perceptual video coding (PVC) unsuitable for these environments. This research …
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Dictionary learning for scalable sparse image representation
… characteristics of the Human Visual System (HVS) mechanism. Specifically, its core structure relies on the exploitation of the spatial high-frequency image components and contrast variations in order to achieve visual scene objects identification at all scalable levels. The implementation of …
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