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Sasse, Ramona: Mutual information based parameter extraction for spreading cell colonies. 2021
Inhalt
Zusammenfassung
Abstract
Acknowledgments
Contents
Introduction
Application background in the pharmaceutical field
Image recording and experimental setting
Motivation for cell colony investigation
Preliminary image processing & feature images
Introduction to the image data set
Initial colony segmentation and moving fronts
Feature images for colony analysis
Theoretical background of feature images
Features based on local texture information
Alternative feature images
Mathematical modeling for spreading cell colonies
A PDE model for colony spreading
Concentric circles for colony spreading
Review of model fitting approaches
Mutual information based model fitting
Mutual information - a brief introduction
Optimization problem for cell colony spreading
The Radon-Nikodym theorem - a small excursion
Introduction to the MI optimization problem
Measure-theoretical setting
Histogram definition and partial derivatives
Discretized histograms, discrete MI and its gradient
Discretizations for numerical approach
Feature images on a discrete pixel grid
Classification images on a discrete pixel grid
Uniform convergence of classification images
Convergence of histogram density functions
Convergence of probability density functions
Analysis of MI-based optimization
Prerequisites for existence and convergence proofs
Existence of minimizers
Convergence of minimizers
Numerics of MI-based optimization
Proof of Concept by means of a Toy Problem
Introduction to the Toy Problem
Derivation of continuous probability density functions
Numerical convergence tests
Numerical optimization for AstraZeneca's data
Settings used in numerical experiments
Extraction of spreading properties for individual wells
Joint extraction of spreading properties for two example wells
Conclusion of model fitting for AstraZeneca data
Conclusion & Outlook
List of Symbols
Model and data parameters
Other symbols
Abbreviations
List of Figures
List of Tables
Bibliography
Curriculum Vitae