Motion Estimation
Mostrando 25-36 de 36 artigos, teses e dissertações.
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25. Algoritmo de casamento de padrões aplicado na estimação de movimento em compressão de video
With the application of motion estimation and compensation techniques in video sequences, we can reduce the number of bits needed to encode the video sequence and to increase the quality of the reconstructed video signal. On the other hand, the high computational cost of the process demands high performance of the encoder. This thesis proposes a new motion e
Publicado em: 2003
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26. AVALIAÇÃO DE ALGORITMOS DE MOVIMENTO PARA A COMPRESSÃO DE SEQÜÊNCIAS DE IMAGENS / EVALUATING MOTION ESTIMATION ALGORITHMS FOR VIDEO COMPRESSION
Este trabalho teve por objetivo estudar algoritmos de estimação de movimento baseados na técnica de casamento de bloco a fim de avaliar a importância da sua escolha na construção de um codificador para uso em compressão de seqüência de imagens. Para isto foram estudados quatro algoritmos baseados na técnica de casamento de bloco, sendo verificada a
Publicado em: 1996
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27. MÉTODO DE AMORTECIMENTO DIRETO COM TRATAMENTO DA SAZONALIDADE ATRAVÉS DO MÉTODO HARMÔNICO DE HARRISON / DIRECT EXPONENTIAL SMOOTHING METHOD INCORPORATING SEASONAL COMPONENT MODELLED BY HARRISON HARMONIC APPROACH
The method of exponential smoothing, although originally propesed during the 60´s, still continues in use up to today. In this thesis we present a new forecasting method for time series / with and/or without seasonality, applying the theory of exponential smoothing and harmonic analysis. It is assume that the series is composed of secular trend (constant, l
Publicado em: 1985
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28. High dose dipyridamole as a pharmacological stress test during cardiac catheterisation in patients with coronary artery disease.
AIM: To validate dipyridamole as a pharmacological stress test during cardiac catheterisation, allowing both functional and morphological estimation of stenosis severity. METHODS: The study encompassed 74 patients: 62 patients with significant coronary artery disease (age 61 (SD 8) years; seven women, 55 men) and 12 controls. Regional wall motion, left ventr
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29. Phonoangiography: A New Noninvasive Diagnostic Method for Studying Arterial Disease*
Phonoangiography, the quantitative analysis of sounds produced by blood flow, has been used to investigate local fluid motion in arteries narrowed by atherosclerosis. The sound spectra measured in vivo were found to be identical to those obtained in laboratory investigations of turbulent pipe flow. A theoretical model is proposed which: (a) quantitatively re
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30. Motion Perception During Variable-Radius Swing Motion in Darkness
Using a variable-radius roll swing motion paradigm, we examined the influence of interaural (y-axis) and dorsoventral (z-axis) force modulation on perceived tilt and translation by measuring perception of horizontal translation, roll tilt, and distance from center of rotation (radius) at 0.45 and 0.8 Hz using standard magnitude estimation techniques (primari
American Physiological Society.
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31. RESONANCE STABILIZATION OF CYCLE GROUPS OF HYDROGEN-BONDED WATER MOLECULES
A quantum-mechanical resonance effect can be associated with cyclic groups of hydrogen-bonded water molecules and, conceivably, might influence the structure of liquid water (M. Ageno, these PROCEEDINGS, 57, 567 (1967)). However, from the calculations presented here, this resonance stabilization appears to be too small (<0.1 kcal/mole) to over come the therm
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32. Rapid estimation of echocardiographic peak velocity of circumferential fibre shortening (peak Vcf).
A transparent grid for estimating peak Vcf directly from the echocardiograph recording is described. Estimates so obtained were compared with peak Vcf measurements made by an echocardiographic digitising technique and with the angiographic ejection fraction in 13 patients with normal left ventricular function and 17 patients with impaired left ventricular fu
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33. Calculation of hydrodynamic properties of small nucleic acids from their atomic structure
Hydrodynamic properties (translational diffusion, sedimentation coefficients and correlation times) of short B-DNA oligonucleotides are calculated from the atomic-level structure using a bead modeling procedure in which each non-hydrogen atom is represented by a bead. Using available experimental data of hydrodynamic properties for several oligonucleotides,
Oxford University Press.
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34. Observations on human tactile directional sensibility.
1. The ability to tell the direction of a motion across the skin deserve attention for being an easily observed function which provides a sensitive test for disturbances of the peripheral and central nervous systems. The mode of operation, on the other hand, of this tactile directional sensibility is still uncertain. 2. The dependence of directional sensibil
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35. Predictive velocity estimation in the pursuit reflex response to pseudo-random and step displacement stimuli in man.
1. Eye movements have been recorded in man in response to various forms of continuous and discontinuous target motions in the horizontal plane in an attempt to establish the mechanisms of prediction in the pursuit reflex. 2. In an initial experiment the target motion was composed of four sinusoids, each of peak velocity +/- 3.3 deg/s. The three lowest freque
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36. Hemoglobin affinity for 2,3-bisphosphoglycerate in solutions and intact erythrocytes: studies using pulsed-field gradient nuclear magnetic resonance and Monte Carlo simulations.
The diffusion coefficient (D) of 2,3-bisphosphoglycerate (DPG) was measured using pulsed-field gradient (PFG)-31P nuclear magnetic resonance spectroscopy in solutions containing 2.7-5.0 mM hemoglobin (Hb) and a range of DPG concentrations. The dependence of the measured values of D on the fraction of the total DPG in the sample that is bound to Hb enabled th