Sökning: "image enhancement"

Visar resultat 1 - 5 av 58 avhandlingar innehållade orden image enhancement.

  1. 1. Image Filtering Methods for Biomedical Applications

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :M. Khalid Khan Niazi; Uppsala universitet.; Uppsala universitet.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Digital image analysis; Image filtering; Intensity inhomogeneity correction; Empirical mode decomposition; Particle Swarm optimization; Image registration; Computerized Image Processing; Datoriserad bildbehandling;

    Sammanfattning : Filtering is a key step in digital image processing and analysis. It is mainly used for amplification or attenuation of some frequencies depending on the nature of the application. Filtering can either be performed in the spatial domain or in a transformed domain. LÄS MER

  2. 2. A Multidimensional Filtering Framework with Applications to Local Structure Analysis and Image Enhancement

    Detta är en avhandling från Institutionen för medicinsk teknik

    Författare :Björn Svensson; Hans Knutsson; Mats Andersson; Oleg Burdakov; Abhir Bhalerao; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Medical image science; multidimensional filtering; image enhancement; image registration; image segmentation; filter networks; graphics processing units GPU ; TECHNOLOGY Other technology Medical engineering; TEKNIKVETENSKAP Övriga teknikvetenskaper Medicinsk teknik;

    Sammanfattning : Filtering is a fundamental operation in image science in general and in medical image science in particular. The most central applications are image enhancement, registration, segmentation and feature extraction. LÄS MER

  3. 3. Image Analysis and Enhancement with Applications in Medicine

    Detta är en avhandling från Department of Applied Electronics, Lund University

    Författare :Lars Floreby; [1998]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zubal; segmentation; Compton; SPECT; morphological; enhancement; multiscale; dynamic programming; motion estimation; optical flow; echocardiography; speckle; Image analysis; ultrasound; Signalbehandling; Signal processing; Fourier surface.;

    Sammanfattning : This thesis consists of six parts in which methods for image analysis and processing are studied. Two-dimensional medical images, image sequences, and three-dimensional image volumes are considered. LÄS MER

  4. 4. FINGERPRINT IMAGE ENHANCEMENT, SEGMENTATION AND MINUTIAE DETECTION

    Detta är en avhandling från Karlskrona : Blekinge Tekniska Högskola

    Författare :Josef Ström Bartunek; Blekinge Tekniska Högskola.; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; adaptive fingerprint image enhancement; fingerprint segmentation; gray-scale image normalization; minutiae features; neural networks; frequency analysis; kurtosis;

    Sammanfattning : Prior to 1960's, the fingerprint analysis was carried out manually by human experts and for forensic purposes only. Automated fingerprint identification systems (AFIS) have been developed during the last 50 years. The success of AFIS resulted in that its use expanded beyond forensic applications and became common also in civilian applications. LÄS MER

  5. 5. Filter Bank Techniques for Signal and Image Processing

    Detta är en avhandling från Karlskrona : Blekinge Tekniska Högskola

    Författare :Farook Sattar; [1996]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Imaging; Higher-order statistics; Detection; Echo cancelling; Multirate system; Multiscale; Image enhancement; Time-frequency analysis and synthesis; Non-stationary signals; Filter bank; Non-parametric estimation; image processing; Bildbehandling; Signal processing; Signalbehandling;

    Sammanfattning : This thesis consists of five parts, each of which considers methods based on filter banks for different applications in signal and image processing. In Part I, a non-parametric estimation method is proposed using filter banks to estimate signals with varying waveforms and arrival times. LÄS MER