Search for dissertations about: "image enhancement steps"

Found 4 swedish dissertations containing the words image enhancement steps.

  2. 1. Improving fingerprint biometrics by local symmetry and fusion

    Author : Hartwig Fronthaler; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alignment; Matching; Minutiae Extraction; Image Restoration; Multi-expert Fusion; Biometrics; Symmetry Features; Structure Tensor; Quality Assessment; Fingerprint Recognition; Image Pyramid; Enhancement; Rotational Symmetry; Cascaded Fusion; Monomodal Fusion; Fingerprint;

    Abstract : Fingerprint recognition and biometrics in general have been significantly gaining attention within the last years, not least due to the biometric passport that has been introduced all over Europe and the American immigration management system US-VISIT. The tasks of fingerprint recognition can be broken down to smaller entities, i.e. READ MORE

  4. 2. Local symmetry features in image processing

    Author : Josef Bigün; Olivier Fangeras; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : The extraction of features is necessary for all aspects of image processing and analysis such as classification, segmentation, enhancement and coding. In the course of developing models to describe images, a need arises for description of more complex structures than lines. READ MORE

  5. 3. Novel planar and particle-based microarrays for point-of-care diagnostics

    Author : Gustav Svedberg; Helene Svahn Andersson; Jesper Gantelius; Fridtjof Lund-Johansen; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Planar microarrays; Particle-based microarrays; Point-of-care diagnostics; Colorimetric detection; Signal enhancement; Isothermal DNA amplification; Solid-phase DNA amplification; Biotechnology; Bioteknologi;

    Abstract : Point-of-care assays are easy-to-use, portable and inexpensive tests that canbe used to aid diagnostics by measuring levels of disease-specific moleculesin settings where access to advanced laboratory equipment and trainedpersonnel are limited, such as at the patient's bedside or in low resourceparts of developing countries. In order to achieve high multiplexingcapacities, such assays can be based on planar microarrays consisting ofspots immobilized on a flat surface or on particle-based microarrays basedon populations of encoded particles. READ MORE

  6. 4. Reduction of metal artifacts in MR imaging of patients with total hip arthroplasty

    Author : Gunilla Müller; Malmö Diagnostisk radiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging. Musculoskeletal. Hip. Hip prosthesis. Complications. Metal artifact. Metal artifact-reducing sequences MARS . Phantom studies. Artifact measurement. Image distortion.;

    Abstract : Aims of the studies: To apply and compare MR imaging metal artifact reducing sequences (MARS) including subtraction imaging after contrast application in patients with metal-on-metal (MoM) hip prostheses, investigate the prevalence and characteristics of periprosthetic abnormalities, as well as their relation with pain and risk factors. [Paper I]. READ MORE