Sökning: "image enhancement"

Visar resultat 36 - 40 av 165 avhandlingar innehållade orden image enhancement.

  1. 36. Development and Use of Optical Sensors in Modern Analytical Chemistry

    Författare :Aron Hakonen; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical sensors; Optodes; Imaging sensors; Fluorescence; pH; Ammonium; Sensing; Nanoparticle enhancement; Plasmonics;

    Sammanfattning : A successful long-term high resolution imaging experiment in marine sediments was performed (17 days within the sample; Paper I). The time correlated calibration procedure was evolved to include parametric sigmoidal and logarithmic functions to provide three of the best performing (optical) pH sensors available up to date (Papers II, III and IV), precision of these sensors were in the 0. LÄS MER

  3. 37. Sol-Gel Glasses Doped with Pt-Acetylides and Gold Nanoparticles for Enhanced Optical Power Limiting

    Författare :Hampus Lundén; Mikael Lindgren; Cesar Lopes; Staffan Tjörnhammar; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : High power laser pulses can be a threat to sensors, including the human eye. Traditionally this threat has been alleviated by colour filters that blocks radiation in chosen wavelength ranges. LÄS MER

  4. 38. On Feature Extraction and Classification in Speech and Image Processing

    Författare :Mikael Nilsson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The natural world is home to innumerable patterns in various forms, which humans are able to locate and interpret by means of the senses. This thesis presents and explores different techniques that mimic such behavior through the use of artificial sensors and computational power, i.e. LÄS MER

  5. 39. Investigation of Bladder Tumors with CT Urography in Patients Presenting with Gross Hematuria

    Författare :Malin Helenius; Anders Magnusson; Torbjörn Andersson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; CT Urography; Bladder tumor; Gross hematuria; Tissue charactarization; Bladder distension; Tumor detection; Radiology; Radiologi;

    Sammanfattning : Bladder tumor is the most common tumor detected in patients presenting with gross hematuria. Early detection and treatment is crucial for good prognosis, however, delay in diagnosis and treatment is common. Routine work-up of gross hematuria includes cystoscopy and Computed Tomography Urography (CTU). LÄS MER

  7. 40. Clinical Applications of Synthetic MRI of the Brain

    Författare :Ida Blystad; Elna-Marie Larsson; Peter Lundberg; Marcel Warntjes; Örjan Smedby; Anne-Marie Landtblom; John Hald; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Magnetic Resonance Imaging (MRI) has a high soft-tissue contrast with a high sensitivity for detecting pathological changes in the brain. Conventional MRI is a time-consuming method with multiple scans that relies on the visual assessment of the neuroradiologist. LÄS MER