Paul Fieguth

Paul Fieguth is the Associate Dean, Resources & Planning for the Faculty of Engineering and a Professor in the Department of Systems Design Engineering. He is also a co-director of the Vision and Imaging Processing Lab and the director of the Statistical Image Processing Lab at the University of Waterloo.

His main areas of research lie in multiscale statistical modelling and remote sensing. In particular, professor Fieguth concentrates on the theory development and understanding of hierarchical/scale recursive estimation algorithms for multi-resolution stochastic processes. Such algorithms use a statistically meaningful strategy to break large estimation problems into smaller pieces, leading to vast improvements in efficiency.

Certainly a very pressing challenge is the amount of image data being collected -- satellite pictures, microscopic images, Google Streetview. There are many image processing algorithms available for regular images, such as portraits from digital cameras, however for scientific imagery, such as satellite images of a forest, microscopic pictures of a cracks in concrete, or medical images of the body from an MRI, more specialized techniques of image processing are required.

Professor Fieguth's interests are to formulate mathematical models, such as the temperature of the earth's atmosphere or the expected topology of the brain, and to combine such models with measured data. Such mathematical operations are tremendously valuable for two reasons:

First, because they allow us to infer subtle results from the data, and second, because they allow us to test whether a given mathematical model makes sense or not, a crucial step in advancing our understanding. The problem, however, is that it is very difficult to solve these equations in a computer for large two- or three-dimensional problems. His research seeks to develop efficient alternatives to modeling and algorithms, currently focusing on two specific strategies:

1. Look at the problem over a variety of scales, coupling a coarse-scale model looking at large objects with a fine-scale model looking at details and textures. Such an idea sounds very simple or intuitive, since the human visual system very much works this way, but is extremely challenging, in practice, because most mathematical models do not allow themselves to be split up.

2. Allow the model to connect not just neighboring pixels, but also pixels further apart. This goal seems obvious, however virtually all spatial statistical models have focused on highly local interactions. Professor Fieguth's research explores models in which every pixel is connected globally, or possibly to a randomly scattered set of pixels where the statistics of the set are a function of the underlying image.

• Signal and Image Processing
• Societal and Environmental Systems
• Statistical Modeling
• Multiscale Methods
• Remote Sensing
• Computer Vision
• Pattern Analysis
• Machine Intelligence and Robotics

• 1995, Doctorate, PhD, Massachusetts Institute of Technology
• 1993, , SM, Massachusetts Institute of Technology
• 1991, Bachelor's, BASc, University of Waterloo

• SYDE 332 - Intro to Complex Systems
  • Taught in 2017, 2018, 2019, 2020
• SYDE 532 - Intro to Complex Systems
  • Taught in 2021
• SYDE 672 - Statistical Image Processing
  • Taught in 2018, 2020
• SYDE 730 - Societal-Environmental Systems
  • Taught in 2021

• Ertay DS, Naiel AM, Vlasea M, Fieguth P, Process performance evaluation and classification via in-situ melt pool monitoring in directed energy deposition, CIRP J of Manufacturing Science and Technology, 35, 2021, 298 - 314
  Link
• Shafiee, Mohammad Javad and Jeddi, Ahmadreza and Nazemi, Amir and Fieguth, Paul and Wong, Alexander, Deep Neural Network Perception Models and Robust Autonomous Driving Systems: Practical Solutions for Mitigation and Improvement, IEEE Signal Processing Magazine, 38(1), 2020, 22 - 30
• Carrington, André M and Fieguth, Paul W and Qazi, Hammad and Holzinger, Andreas and Chen, Helen H and Mayr, Franz and Manuel, Douglas G, A new concordant partial AUC and partial c statistic for imbalanced data in the evaluation of machine learning algorithms, BMC Medical Informatics and Decision Making, 20(1), 2020, 1 - 12
• Shafiee, Mohammad Javad and Jeddi, Ahmadreza and Nazemi, Amir and Fieguth, Paul and Wong, Alexander, Deep Neural Network Perception Models and Robust Autonomous Driving Systems, arXiv preprint arXiv:2003.08756, 2020
• Javad Shafiee, Mohammad and Jeddi, Ahmadreza and Nazemi, Amir and Fieguth, Paul and Wong, Alexander, Deep Neural Network Perception Models and Robust Autonomous Driving Systems, arXiv, 2020
• Abdar, Moloud and Pourpanah, Farhad and Hussain, Sadiq and Rezazadegan, Dana and Liu, Li and Ghavamzadeh, Mohammad and Fieguth, Paul and Khosravi, Abbas and Acharya, U Rajendra and Makarenkov, Vladimir and others, A review of uncertainty quantification in deep learning: Techniques, applications and challenges, arXiv preprint arXiv:2011.06225, 2020
• Naiel M, Ertay DS, Vlasea M, Fieguth P, Adaptive vision-based detection of laser-material interaction for directed energy deposition, Journal of Additive Manufacturing, 36, 2020
  Link

• Currently considering applications from graduate students. A completed online application is required for admission; start the application process now.