Search for dissertations about: "subpixel"

Showing result 1 - 5 of 9 swedish dissertations containing the word subpixel.

2. 1. Enhanced image analysis, a tool for precision metrology in the micro and macro world

   Author : Bita Daemi; Lars Mattsson; Peter Ekberg; Mikael Sjödahl; KTH; []
   Keywords : Image processing; image metrology; precision metrology; image correlation; subpixel; accuracy; uncertainty; Production Engineering; Industriell produktion;

   Abstract : The need for high speed and cost efficient inspection in manufacturing lineshas led to a vast usage of camera-based vision systems. The performance ofthese systems is sufficient to determine shape and size, but hardly to an accuracylevel comparable with traditional metrology tools. READ MORE

4. 2. Robust Real-Time Estimation of Region Displacements in Video Sequences

   Author : Johan Skoglund; Michael Felsberg; Hanno Scharr; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; tracking; subpixel; real time; covariance; pose estimation; Image analysis; Bildanalys;

   Abstract : The possibility to use real-time computer vision in video sequences gives many opportunities for a system to interact with the environment. Possible ways for interaction are e.g. augmented reality like in the MATRIS project where the purpose is to add new objects into the video sequence, or surveillance where the purpose is to find abnormal events. READ MORE

5. 3. An Event-Reconstructing Silicon Detector for 1 µm Resolution Spectral Computed Tomography

   Author : Christel Sundberg; Mats Danielsson; Julia Herzen; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; photon-counting; silicon detector; spectral computed tomography; subpixel resolution; dose efficiency; coincidence tracking; event reconstruction; fotonräknande; kiseldetektor; spektral datortomografi; subpixelupplösning; doseffektivitet; koincidensspårning; händelserekonstruktion; Fysik; Physics;

   Abstract : Computed tomography (CT) is a medical imaging modality in which cross-sectional images of the human body are created using x-rays. Commercial CT scanners utilize energy-integrating detectors to measure the x-ray attenuation. However, photon-counting detectors with energy-discriminating abilities have started to emerge. READ MORE

6. 4. Preattentive gaze control for robot vision

   Author : Carl-Johan Westelius; Linköpings universitet; []
   Keywords : Robot vision; Resolution pyramids; Phase-based disparity estimation; Focus of attention; TECHNOLOGY; TEKNIKVETENSKAP;

   Abstract : A framework for a hierarchical approach to gaze control of a robot vision system is presented, and a implementation on a simulated robot is described. The robot is equipped with a heterogeneous sampled imaging system, a fovea, resembling the varying resolution in a human retina. READ MORE

7. 5. Fast Methods for Vascular Segmentation Based on Approximate Skeleton Detection

   Author : Kristína Lidayová; Hans Frimmel; Ewert Bengtsson; Örjan Smedby; Alejandro F. Frangi; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; medical image analysis; automatic skeleton extraction; vascular segmentation; coverage segmentation; convolutional neural network classifier; CT angiography; Computerized Image Processing; Datoriserad bildbehandling;

   Abstract : Modern medical imaging techniques have revolutionized health care over the last decades, providing clinicians with high-resolution 3D images of the inside of the patient's body without the need for invasive procedures. Detailed images of the vascular anatomy can be captured by angiography, providing a valuable source of information when deciding whether a vascular intervention is needed, for planning treatment, and for analyzing the success of therapy. READ MORE