Sökning: "Wiener Filtering"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden Wiener Filtering.

  1. 1. Evaluation of a Novel Reconstruction Framework for Gamma Knife Cone-Beam CT - The Impact of Scatter Correction and Noise Filtering on Image Quality and Co-registration Accuracy

    Master-uppsats, KTH/Fysik

    Författare :Ida Hägnestrand; [2023]
    Nyckelord :Gamma Knife; Cone-beam computed tomography; Image quality; Image reconstruction; Co-registration; Contrast; Uniformity; Spatial resolution; Scatter correction; Wiener filter; Noise filter; Patient positioning; Stereotactic radiosurgery; Gammakniv; Strålkniv; Cone-Beam Computed Tomography; Bildkvalitet; Bildrekonstruktion; Co-registrering; Kontrast; Uniformitet; Spatial upplösning; Spridningskorrigering; Wienerfilter; Brusfilter; Stereotaktisk strålkirurgi;

    Sammanfattning : The Gamma Knife is a non-invasive stereotactic radiosurgery system used for treatments of deep targets in the brain. Accurate patient positioning is needed for precise radiation delivery to the target. LÄS MER

  3. 2. Development of a Digital Optimal Filter Platform

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Signaler och System

    Författare :Joakim Brykt; [2018]
    Nyckelord :;

    Sammanfattning : This report is the result of a Master Thesis project which is a part of the Master programme in Electrical Engineering at Uppsala universitet. The purpose of this Master Thesis project is to develop an embedded platform for the design and implementation of optimal digital filters, in particular, the Kalman and the Wiener filter. LÄS MER

  4. 3. Cross-subframe channel estimation for low-complexity devices in LTE

    Master-uppsats, KTH/Teknisk informationsvetenskap

    Författare :Hugo Lime; [2017]
    Nyckelord :;

    Sammanfattning : One of the most critical issues of wireless communication systems is the timevaryingand frequency-selective channel. Knowledge about the channel greatlyimproves communication performance. It enables coherent demodulation andmeasurements of Signal to Noise Ratio (SNR) and Channel Quality Indicators(CQI). LÄS MER

  5. 4. Estimation and prediction of wave input and system states based on local hydropressure and machinery response measurements

    Master-uppsats, KTH/Optimeringslära och systemteori

    Författare :Quentin Laurent; [2016]
    Nyckelord :;

    Sammanfattning : Waves represent a big untapped energy source and many are endeavouring to develop Wave Energy Converters (WEC) to harvest this resource. The goal of this thesis, carried out with the young technology company CorPower Ocean AB, is to enable a better control of the company’s WEC by providing control strategies with a prediction of the input force on the device, also called excitation force. LÄS MER

  7. 5. Processing of Optical Coherence Tomography Images : Filtering and Segmentation of Pathological Thyroid Tissue

    Master-uppsats, Linköpings universitet/Institutionen för medicinsk teknik; Linköpings universitet/Medicinska fakulteten

    Författare :Daniela Koller; [2016]
    Nyckelord :;

    Sammanfattning : In the human body, the main function of the healthy thyroid gland is the regulation of the metabolism and hormone production. Included in the thyroid are organized structured and uniformly shaped follicles ranging from 50-500 μm in diameter. LÄS MER