Sökning: "Josef Bigün"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Josef Bigün.

  1. 1. Circular Symmetry Models in Image Processing

    Författare :Josef Bigun; Gösta Granlund; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : New methods for feature extraction based on the spectral properties of local neighbourhoods is presented. The spectral behaviour of the neighbourhoods is investigated in the spatial domain using the Parseval relation applied to partial derivative pictures. LÄS MER

  3. 2. Local symmetry features in image processing

    Författare :Josef Bigün; Olivier Fangeras; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : 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. LÄS MER

  4. 3. Multifont recognition System for Ethiopic Script

    Författare :Yaregal Assabie Lake; Josef Bigun; Högskolan i Halmstad; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ethiopic character recognition; OCR; Multifont recognition; Amharic; Direction fields; Structural and syntactic pattern recognition; Image analysis; Bildanalys;

    Sammanfattning : In this thesis, we present a general framework for multi-font, multi-size and multi-style Ethiopic character recognition system. We propose structural and syntactic techniques for recognition of Ethiopic characters where the graphically comnplex characters are represented by less complex primitive structures and their spatial interrelationships. LÄS MER

  5. 4. Algorithms for ion current based sensing of combustion variability and pressure peak position

    Författare :Stefan Byttner; Josef Bigun; Högskolan i Halmstad; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SI engines; Combustion variability; Ion currents; Location of pressure peak; Exhaust Gas Recirculation; Electronic engine control;

    Sammanfattning : .... LÄS MER

  7. 5. Ocular Recognition in Unconstrained Sensing Environments

    Författare :Kevin Hernandez-Diaz; Fernando Alonso-Fernandez; Josef Bigun; Raymond Veldhuis; Högskolan i Halmstad; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Biometrics; Computer Vision; Pattern Recognition; Periocular Recognition;

    Sammanfattning : This thesis focuses on the problem of increasing flexibility in the acquisition and application of biometric recognition systems based on the ocular region. While the ocular area is one of the oldest and most widely studied biometric regions thanks to its rich and discriminative elements and characteristics, most modalities such as retina, iris, eye movements, or oculomotor plant have limitations regarding data acquisition. LÄS MER