Sökning: "laplacian algorithm"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden laplacian algorithm.

  1. 1. Phase Unwrapping MRI Flow Measurements

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen Vi3

    Författare :Mio Liljeblad; [2023]
    Nyckelord :phase unwrapping; computer vision; cine MRI; NMR; flow measurements; velocity encoding; venc; energy minimization; magnetic resonance; cardiac MRI; sinotubuar junction; pulmonary artery; ascending descending aorta; laplacian algorithm; iterative graph cuts; IGC; sequential tree-reweighted message passing; TRW-S; velocity to noise ratio; VNR; retrospective wrapping; energy formulation;

    Sammanfattning : Magnetic resonance images (MRI) are acquired by sampling the current of induced electromotiveforce (EMF). EMF is induced due to flux of the net magnetic field from coherent nuclear spins with intrinsic magnetic dipole moments. LÄS MER

  3. 2. Improving bright-field images for tracking particles with Defocustracker

    Kandidat-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Carl Lundin; [2022]
    Nyckelord :Defocustracker; GDPT; particle tracking; bright-field; acoustophoresis; Laplacian of Gaussian; Technology and Engineering;

    Sammanfattning : Acoustophoresis is a cell separation technology where particles or cells are suspended in a fluid container and subject to acoustic standing waves. The standing waves exerts an acoustic radiation force on the particles, pushing them towards the nodal plane. LÄS MER

  4. 3. Exploring and extending eigensolvers for Toeplitz(-like) matrices : A study of numerical eigenvalue and eigenvector computations combined with matrix-less methods

    Kandidat-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Martin Knebel; Fredrik Cers; Oliver Groth; [2022]
    Nyckelord :Toeplitz matrices; eigenvalue computation; eigenvector computation; matrix-less methods;

    Sammanfattning : We implement an eigenvalue solving algorithm proposed by Ng and Trench, specialized for Toeplitz(-like) matrices, utilizing root finding in conjunction with an iteratively calculated version of the characteristic polynomial. The solver also yields corresponding eigenvectors as a free bi-product. LÄS MER

  5. 4. A Comparison on Supervised and Semi-Supervised Machine Learning Classifiers for Diabetes Prediction

    Kandidat-uppsats, Blekinge Tekniska Högskola/Institutionen för datavetenskap

    Författare :Lokesh Kola; Vigneshwar Muriki; [2021]
    Nyckelord :Machine Learning; Semi-supervised Learning; Supervised Learning; Diabetes Prediction;

    Sammanfattning : Background: The main cause of diabetes is due to high sugar levels in the blood. There is no permanent cure for diabetes. However, it can be prevented by early diagnosis. In recent years, the hype for Machine Learning is increasing in disease prediction especially during COVID-19 times. LÄS MER

  7. 5. Optical Detection and Altitude Estimation of Power Lines Relative to a UAV

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Carl Daniel Ahlberg; [2020]
    Nyckelord :;

    Sammanfattning : Inspection of power lines is a crucial activity to locate the source of power outages or to preemptively stop them. Visual inspection methods using optical cameras attached to Unmanned Aerial Vehicles (UAV) have become increasingly popular due to cheap operating costs, large areal coverage and the wide availability of these platforms. LÄS MER