Sökning: "Structure tensor"

Visar resultat 21 - 25 av 26 uppsatser innehållade orden Structure tensor.

  1. 21. Cosmological Density Perturbations

    Kandidat-uppsats, Fakulteten för teknik- och naturvetenskap

    Författare :Kristoffer Hultgren; [2007]
    Nyckelord :Physics; Cosmology; Astronomy; Relativity; Gravitation; Fysik; Kosmologi; Astronomi; Relativitetsteori; Gravitation;

    Sammanfattning : This thesis presents a brief review of gravitation and cosmology, and then gives an overview of the theory of cosmological perturbations; subsequently some applications are discussed, such as large-scale structure formation. Cosmological perturbations are here presented both in the Newtonian paradigm and in two di¤erent relativistic approaches. LÄS MER

  3. 22. Detektering av sprickor i vägytor med hjälp av Datorseende

    Uppsats för yrkesexamina på grundnivå, Bildbehandling; Tekniska högskolan

    Författare :Staffan Håkansson; [2005]
    Nyckelord :Technology; pavement; asphalt; crack detection; computer vision; orientation tensor; structure tensor; image processing; TEKNIKVETENSKAP;

    Sammanfattning : This thesis describes new methods for automatic crack detection in pavements. Cracks in pavements can be used as an early indication for the need of reparation. LÄS MER

  4. 23. Implementing a visualization tool for myocardial strain tensors

    Uppsats för yrkesexamina på grundnivå, Institutionen för medicinsk teknik

    Författare :Anders Rönnbrant; [2005]
    Nyckelord :cardiac strain; deformation; tensor; visualization; Coin3d; Open Inventor;

    Sammanfattning : The heart is a complex three-dimensional structure with mechanical properties that are inhomogeneous, non-linear, time-variant and anisotropic. These properties affect major physiological factors within the heart, such as the pumping performance of the ventricles, the oxygen demand in the tissue and the distribution of coronary blood flow. LÄS MER

  5. 24. Scale-Space Methods as a Means of Fingerprint Image Enhancement

    Uppsats för yrkesexamina på grundnivå, Institutionen för teknik och naturvetenskap

    Författare :Karl Larsson; [2004]
    Nyckelord :Datorteknik; fingerprint; template aging; correlation; image enhancement; scale-space; Gaussian scale-space; linear scale-space; nonlinear isotropic scale-space; nonlinear anisotropic scale-space; diffusion; scalar driven diffusion; scalar dependent diffusion; tensor driven diffusion; tensor dependent diffusion; Datorteknik;

    Sammanfattning : The usage of automatic fingerprint identification systems as a means of identification and/or verification have increased substantially during the last couple of years. It is well known that small deviations may occur within a fingerprint over time, a problem referred to as template ageing. LÄS MER

  7. 25. Regional Kinematics of the Heart: Investigation with Marker Tracking and with Phase Contrast Magnetic Resonance Imaging

    Uppsats för yrkesexamina på grundnivå, Institutionen för medicinsk teknik

    Författare :Katarina Kindberg; [2003]
    Nyckelord :Biotechnology; strain; tensor; markers; PC-MRI; myocardium; Bioteknik;

    Sammanfattning : The pumping performance of the heart is affected by the mechanical properties of the muscle fibre part of the cardiac wall, the myocardium. The myocardium has a complex structure, where muscle fibres have different orientations at different locations, and during the cardiac cycle, the myocardium undergoes large elastic deformations. LÄS MER