Dr Joab Winkler

About

Joab Winkler is a Reader in The Department of Computer Science at The University of Sheffield. He obtained his undergraduate and PhD degrees at Imperial College London and University College London, respectively. He worked for a few years in industry, before returning to university to conduct research into algebraic and numerical properties of curves and surfaces in computer-aided design systems. He has extended this interest in numerical methods to work on blind image deconvolution, optical flow and neural networks. More details are in the section 'Research interests'.

Selected publications

• Winkler J, Lawrence N & Niranjan M (2005) Lecture Notes in Computer Science (Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface.
• Winkler J (2026) Overfitting, regularisation and condition estimation in regression. International Journal of Data Science and Analytics, 22(13).
• Winkler JR & Mitrouli M (2025) Analysis and implications of a negative parameter in Tikhonov regularisation. Communications in Statistics - Theory and Methods. View this article in WRRO
• Lakshmi MV & Winkler J (2025) Numerical properties of solutions of LASSO regression. Applied Numerical Mathematics, 208(Part A), 297-309. View this article in WRRO
• Winkler JR (2024) Error analysis and condition estimation of the pyramidal form of the Lucas-Kanade method in optical flow. Electronics, 13(5). View this article in WRRO
• Winkler J, Mitrouli M & Koukouvinos C (2022) The application of regularisation to variable selection in statistical modelling. Journal of Computational and Applied Mathematics, 404. View this article in WRRO
• Bourne M, Winkler J & Yi S (2021) The computation of the greatest common divisor of three bivariate Bernstein polynomials defined in a rectangular domain. Applied Numerical Mathematics, 166, 348-368. View this article in WRRO
• Bourne M, Winkler JR & Su Y (2021) An approximate factorisation of three bivariate Bernstein basis polynomials defined in a triangular domain. Journal of Computational and Applied Mathematics, 390.
• Bourne M, Winkler JR & Su Y (2020) The computation of the degree of the greatest common divisor of three Bernstein basis polynomials. Journal of Computational and Applied Mathematics, 373.
• Winkler JR & Mitrouli M (2020) Condition estimation for regression and feature selection. Journal of Computational and Applied Mathematics, 373. View this article in WRRO