Sökning: "Median filtering"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden Median filtering.

  1. 1. Reduction of Noise and Artefacts in MRIScan of Metal Implant Reconstructed by Frequency Mapping

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Pontus Wahlqvist; [2022]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Metal objects can cause significant artefacts in magnetic resonance imaging (MRI) scans, cause loss of signal and what is known as geometric warping. There are ways to address these problems using different MRI sequences. This project looks at a newer method of artefact correction proposed by Månsson and Morin. LÄS MER

  3. 2. Influence of land cover changes on organic carbon and organic nitrogen concentrations in Swedish rivers

    Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Julia Iwan; [2021]
    Nyckelord :Total Organic Carbon TOC ; Total Organic Nitrogen TON ; Land Cover Change; Sweden; WaterBase; Earth and Environmental Sciences;

    Sammanfattning : There is increasing pressure on freshwater systems due to excessive nutrient loading by anthropogenic sources. In Sweden, freshwaters have become browner due to increasing exports of organic matter from soils into streams, rivers, and lakes. LÄS MER

  4. 3. Noggrannheten hos ett positioneringssystem baserat på Bluetooth 5 : En jämförande studie av fem olika filtreringsalgoritmers påverkan på positioneringsnoggrannheten

    Kandidat-uppsats, Högskolan i Jönköping/JTH, Datateknik och informatik

    Författare :Viktor Karlsson; Eric Pehrsson; [2018]
    Nyckelord :;

    Sammanfattning : Purpose – The purpose of this thesis was to identify and evaluate different filtering algorithms for raw Received Signal Strength Indication (RSSI) values in an indoor positioning system. The purpose was also to examine how the positioning accuracy is affected depending on which filter that was applied to an indoor positioning system based on Bluetooth Low Energy (BLE) 5. LÄS MER

  5. 4. Comparison and Improvement Of Collaborative Filtering Algorithms

    Kandidat-uppsats, KTH/Skolan för datavetenskap och kommunikation (CSC)

    Författare :Victor Hansjons Vegeborn; Hakim Rahmani; [2017]
    Nyckelord :;

    Sammanfattning : Recommender Systems is a topic several computer scientists have researched. With today’s e-commerce and Internet access, companies try to maximize their profit by utilizing var- ious recommender algorithms. One methodology used in such systems is Collaborative Filtering. LÄS MER

  7. 5. Human Detection Using Ultra Wideband Radar and Continuous Wave Radar

    Master-uppsats, Linköpings universitet/Kommunikationssystem

    Författare :Atheeq Ahmed; [2017]
    Nyckelord :UWB; Dual Frequency CW Radar; Human detection;

    Sammanfattning : A radar works by radiating electromagnetic energy and detecting the reflected signal returned from the target. The nature of the reflected signal provides information about the target’s distance or speed. LÄS MER