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Visar resultat 1 - 5 av 9 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Towards Reliable and Accurate Global Structure-from-Motion

   Författare :José Pedro Lopes Iglesias; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bundle adjustment; point set registration; camera calibration; global SfM; Structure-from-Motion; radial distortion; 3D reconstruction; non-rigid SfM; pOSE; matrix factorization;

   Sammanfattning : Reconstruction of objects or scenes from sparse point detections across multiple views is one of the most tackled problems in computer vision. Given the coordinates of 2D points tracked in multiple images, the problem consists of estimating the corresponding 3D points and cameras' calibrations (intrinsic and pose), and can be solved by minimizing reprojection errors using bundle adjustment. LÄS MER

3. 2. Numerical Methods for Geometric Vision: From Minimal to Large Scale Problems

   Författare :Martin Byröd; Matematik LTH; []
   Nyckelord :Minimal Problems; Bundle Adjustment; Computer Vision; Polynomial Equations;

   Sammanfattning : This thesis presents a number of results and algorithms for the numerical solution of problems in geometric computer vision. In geometric computer vision one tries to extract geometric information about the world and the observer from a sequence of images. LÄS MER

4. 3. Morbidity and mortality in patients with bundle branch block

   Författare :Fariborz Tabrizi; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :AV block; Bifascicular block; Congestive heart failure; Bundle branch block; Mortality; Myocardial infarction; Sudden cardiac death; Syncope.;

   Sammanfattning : Background: Syncope is a predictor of subsequent high-degree atrioventricular (AV) block in patients with bifascicular block (BFB) but the time relationship between syncope and development of AV block has not been well-studied. Patients with BFB have a significantly higher mortality rate compared with an age and sex matched population. LÄS MER

5. 4. Efficient Structure and Motion: Path Planning, Uncertainty and Sparsity

   Författare :Sebastian Haner; Matematik LTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : This thesis explores methods for solving the structure-and-motion problem in computer vision, the recovery of three-dimensional data from a series of two-dimensional image projections. The first paper investigates an alternative state space parametrization for use with the Kalman filter approach to simultaneous localization and mapping, and shows it has superior convergence properties compared with the state-of-the-art. LÄS MER

7. 5. View Planning and Refractive Modeling for Structure and Motion

   Författare :Sebastian Haner; Matematik LTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Computer Vision; Structure and Motion; 3D Reconstruction; View Planning; Refractive Modeling;

   Sammanfattning : This thesis presents contributions to structure-and-motion estimation, a central topic in the field of geometric computer vision. In particular, the problem of view planning is considered, and continuous and discrete optimization-based algorithms are given for how to plan the path of a sensor to its destination, while balancing the competing goals of path length and reconstruction accuracy. LÄS MER