Sökning: "gabor transform"
Hittade 5 uppsatser innehållade orden gabor transform.
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 datorsystemteknikSammanfattning : Background. Nowadays, information retrieval system become more and more popular, it helps people retrieve information more efficiently and accelerates daily task. LÄS MER
2. Time-frequency analysis for responses evoked by nociceptive and non-nociceptive stimuli based on EEG signals
Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknikSammanfattning : In the pursuit of a system capable of measuring pain signals in humans we propose a method to differentiate those signals related to pain from those which are not. We performed a time-frequency analysis using the Gabor transform to have complete information about the spectrum and its behaviour through the time to study the main differences over the evoked potentials provoked by both nociceptive and somatosensory (non-nociceptive) stimulation. LÄS MER
3. On the Short-Time Fourier Transform and Gabor Frames generated by B-splines
Kandidat-uppsats, Institutionen för datavetenskap, fysik och matematik, DFMSammanfattning : In this thesis we study the short-time Fourier transform. The short-time Fourier transform of a function f(x) is obtained by restricting our function to a short time segment and take the Fourier transform of this restriction. This method gives information locally of f in both time and frequency simultaneously. LÄS MER
4. Audio editing in the time-frequency domain using the Gabor Wavelet Transform
Uppsats för yrkesexamina på avancerad nivå, Centrum för bildanalysSammanfattning : 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
5. Extraction and Application of Secondary Crease Information in Fingerprint Recognition Systems
Uppsats för yrkesexamina på grundnivå, Institutionen för teknik och naturvetenskapSammanfattning : 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