Projects

Computer-Aided Detection And Personalised Screening In Breast Imaging

This project aims to develop computer-aided detection tools with expertise from radiology, image processing, statistics and machine learning (see more extended project description on CMIH webpage here).

Mathematical Imaging Methods for Mitosis Analysis in Live-Cell Phase Contrast Microscopy

mitosisanalysis_hr

This project is concerned with the development of imaging tools to automate and facilitate mitosis analysis in cancer research. In a collaboration with the Cancer Research UK Cambridge Institute we developed the MitosisAnalyser framework accompanied by a Graphical User Interface. In a first step, mitotic cells are detected by using the circular Hough transform. Then, we use variational level-set methods for subsequent tracking of the cells to determine the length and the outcome of mitosis.

Publications

Video (Made for a contest of the Cantab Capital Institute for the Mathematics of Information)

J. Pike, P. Mascalchi, JSG, S. Reichelt. Event Driven Automated Microscopy. Applications in Cancer Research. Imaging & Microscopy, 2017. (article)

JSG, J.A. Harrington, S.B. Koh, J.A. Pike, A. Schreiner, M. Burger, C.-B. Schönlieb, S. Reichelt. Mathematical Imaging Methods for Mitosis Analysis in Live-Cell Phase Contrast Microscopy. Methods, 115: 91-99, 2017. Image Processing for Biologists. (article) (arXiv)

Learning Filter Functions in Regularisers by Minimising Quotients

regularisationlearning_hr

The aim of this project is to develop learning frameworks by allowing for both fit- and misfit training data. We developed a quotient model that yields the possibility to resemble the behaviour of well-established derivative-based sparse regularisers. Moreover, we introduced novel families of non-derivative-based regularisers and are currently investigating the potential to extend our model in the context of classification problems.

Publication

M. Benning, G. Gilboa, JSG, C.-B. Schönlieb. Learning Filter Functions in Regularisers by Minimising Quotients. In Scale Space and Variational Methods in Computer Vision, pages 511-523. Springer, 2017. (article) (arXiv)

Regularisation by Sparse Vector Fields

Inspired by works on image compression borrowing ideas from diffusion inpainting, we developed a variational model enforcing sparsity of the divergence of a vector field related to the gradient of the underlying image. We further investigated this sparse regulariser in the context of image denoising and extended it, eventually proposing a novel unified regulariser based on four natural vector field operators: the curl, the divergence and both components of the shear. We show that our model generalises well-established TV-type first- and second-order regularisers.

Publications

E.-M. Brinkmann, M. Burger, JSG. Unified Models for Second-Order TV-Type Regularisation in Imaging – A New Perspective Based on Vector Operators. Submitted, 2018. (arXiv)

E.-M. Brinkmann, M. Burger, JG. Regularization with Sparse Vector Fields: From Image Compression to TV-Type Reconstruction. In Scale Space and Variational Methods in Computer Vision, pages 191-202. Springer, 2015. (article) (arXiv)

Regularisation by Circular Hough Transform

In this project, we investigate potential benefits of including the circular Hough transform operator in sparse regularisation functionals, acting as a shape prior.

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