Sökning: "wavelets"

Visar resultat 1 - 5 av 33 uppsatser innehållade ordet wavelets.

  1. 1. Natural Fingerprinting of Steel

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Johannes Strömbom; [2021]
    Nyckelord :fingerprinting; laser speckles; speckle correlation; scattering transform; wavelets; feature detection;

    Sammanfattning : A cornerstone in the industry's ongoing digital revolution, which is sometimes referred to as Industry 4.0, is the ability to trace products not only within the own production line but also throughout the remaining lifetime of the products. LÄS MER

  3. 2. Clinical dose feature extraction for prediction of dose mimicking parameters

    Master-uppsats, KTH/Matematik (Avd.)

    Författare :Anton Finnson; [2021]
    Nyckelord :Radiation therapy; feature extraction; wavelets; treatment planning; dose mimicking; variational autoencoder; Strålterapi; wavelets; doshärmning;

    Sammanfattning : Treating cancer with radiotherapy requires precise planning. Several planning pipelines rely on reference dose mimicking, where one tries to find machine parameters best mimicking a given reference dose. Dose mimicking relies on having a function that quantifies dose similarity well, necessitating methods for feature extraction of dose images. LÄS MER

  4. 3. The Discrete Wavelet Transform

    Master-uppsats, Mälardalens högskola/Akademin för utbildning, kultur och kommunikation

    Författare :Wirén Anton; [2021]
    Nyckelord :Wavelet theory; multiresolution analysis; image processing.;

    Sammanfattning : In this thesis we will explore the theory behind wavelets. The main focus is on the discrete wavelet transform, although to reach this goal we will also introduce the discrete Fourier transform as it allow us to derive important properties related to wavelet theory, such as the multiresolution analysis. LÄS MER

  5. 4. Existence and Approximations of Optimal Wavelets

    Master-uppsats, Lunds universitet/Matematikcentrum

    Författare :Simon Halvdansson; [2021]
    Nyckelord :Mathematics and Statistics;

    Sammanfattning : In this thesis we consider two notions of mother wavelet uncertainty for the one-dimensional wavelet transform based on a new localization framework recently introduced by Levie and Sochen. It is shown that minimizers of these uncertainties in the space of linear splines with compact support approximate the minimizers in $L^2$ in an appropriate sense, validating numerical schemes for searching for minimizers. LÄS MER

  7. 5. Lossless Image compression using MATLAB : Comparative Study

    Kandidat-uppsats, Blekinge Tekniska Högskola

    Författare :Surya Teja Kodukulla; [2020]
    Nyckelord :Algorithms; Compression Ratio; Efficiency; Image Compression; Lossless; Lossy; Quality;

    Sammanfattning : Context: Image compression is one of the key and important applicationsin commercial, research, defence and medical fields. The largerimage files cannot be processed or stored quickly and efficiently. Hencecompressing images while maintaining the maximum quality possibleis very important for real-world applications. LÄS MER