Sökning: "Gabor filter"

Hittade 4 uppsatser innehållade orden Gabor filter.

  1. 1. Comparative study of table layout analysis : Layout analysis solutions study for Swedish historical hand-written document

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för datalogi och datorsystemteknik

    Författare :Xusheng Liang; [2019]
    Nyckelord :layout analysis; pattern recognition; document digitalization; table layout extraction; transfer learning; machine learning; image processing; Hessian filter; Gabor filter;

    Sammanfattning : Background. Nowadays, information retrieval system become more and more popular, it helps people retrieve information more efficiently and accelerates daily task. LÄS MER

  2. 2. Audio editing in the time-frequency domain using the Gabor Wavelet Transform

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Centrum för bildanalys

    Författare :Ulf Hammarqvist; [2011]
    Nyckelord :Wavelet transform; time-frequency analysis; audio engineering; signal processing; audio restoration; audio interpolation; pitch-shift; time-stretch; loglet; compression; down-sampling; visualization; fourier transform; convolution; filter bank; digital filters; noise reduction; re-assignment; gabor transform; scalogram;

    Sammanfattning : Visualization, processing and editing of audio, directly on a time-frequency surface, is the scope of this thesis. More precisely the scalogram produced by a Gabor Wavelet transform is used, which is a powerful alternative to traditional techinques where the wave form is the main visual aid and editting is performed by parametric filters. LÄS MER

  3. 3. Multiview Face Detection Using Gabor Filter and Support Vector Machines

    Kandidat-uppsats, Högskolan i Halmstad/Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE); Högskolan i Halmstad/Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

    Författare :gül önder; aydın kayacık; [2008]
    Nyckelord :Face detection; support Vector Machines; Gabor Filter;

    Sammanfattning : Face detection is a preprocessing step for face recognition algorithms. It is the localization of face/faces in an image or image sequence. Once the face(s) are localized, other computer vision algorithms such as face recognition, image compression, camera auto focusing etc are applied. LÄS MER

  4. 4. Extraction and Application of Secondary Crease Information in Fingerprint Recognition Systems

    Uppsats för yrkesexamina på grundnivå, Linköpings universitet/Institutionen för teknik och naturvetenskap

    Författare :Pontus Hymér; [2005]
    Nyckelord :Datorteknik; biometrics; fingerprint analysis; feature extraction; secondary creases; template aging; Gabor filter; pattern recognition; Hough transform; vector clustering; Datorteknik;

    Sammanfattning : This thesis states that cracks and scars, referred to as Secondary Creases, in fingerprint images can be used as means for aiding and complementing fingerprint recognition, especially in cases where there is not enough clear data to use traditional methods such as minutiae based or correlation techniques. A Gabor filter bank is used to extract areas with linear patterns, where after the Hough Transform is used to identify secondary creases in a r, theta space. LÄS MER