no code implementations • 5 Oct 2023 • Louis-François Bouchard, Mohsen Ben Lazreg, Matthew Toews
This paper proposes a novel hue-like angular parameter to model the structure of deep convolutional neural network (CNN) activation space, referred to as the {\em activation hue}, for the purpose of regularizing models for more effective learning.
1 code implementation • 21 Jun 2023 • Mehraveh Javan, Matthew Toews, Marco Pedersoli
To fully understand this problem, we analyse the performance of models independently trained with each pooling configurations on CIFAR10, using a ResNet20 network, and show that the position of the downsampling layers can highly influence the performance of a network and predefined downsampling configurations are not optimal.
Ranked #1 on Neural Architecture Search on Food-101 (Accuracy (% ) metric)
no code implementations • 7 Mar 2023 • Javad Manashti, Pouyan Pirnia, Alireza Manashty, Sahar Ujan, Matthew Toews, François Duhaime
This project aimed to determine the grain size distribution of granular materials from images using convolutional neural networks.
no code implementations • 5 Jun 2022 • Louis-François Bouchard, Mohsen Ben Lazreg, Matthew Toews
A 3D space $(x, y, t)$ is defined by $(x, y)$ coordinates in the image plane and CNN layer $t$, where a principal ray $(0, 0, t)$ runs in the direction of information propagation through both the optical axis and the image center pixel located at $(x, y)=(0, 0)$, about which the sharpest possible spatial focus is limited to a circle of confusion in the image plane.
no code implementations • 30 May 2022 • Laurent Chauvin, William Wells III, Matthew Toews
Augmenting local feature properties with sign in addition to standard (location, scale, orientation) geometry leads to descriptors that are invariant to coordinate reflections and intensity contrast inversion.
1 code implementation • 19 Dec 2021 • Jean-Baptiste Carluer, Laurent Chauvin, Jie Luo, William M. Wells III, Ines Machado, Rola Harmouche, Matthew Toews
This work details a highly efficient implementation of the 3D scale-invariant feature transform (SIFT) algorithm, for the purpose of machine learning from large sets of volumetric medical image data.
no code implementations • 7 Oct 2021 • Laurent Chauvin, Matthew Toews
Subject ID labels are unique, anonymized codes that can be used to group all images of a subject while maintaining anonymity.
1 code implementation • 11 Mar 2021 • Laurent Chauvin, Kuldeep Kumar, Christian Desrosiers, William Wells III, Matthew Toews
Our measure generalizes the Jaccard index to account for soft set equivalence (SSE) between keypoint elements, via an adaptive kernel framework modeling uncertainty in keypoint appearance and geometry.
no code implementations • MIDL 2019 • Laurent Chauvin, Matthew Toews
We present an image keypoint-based morphological signature that can be used to efficiently assess the pair-wise whole-brain similarity for large MRI datasets.
no code implementations • 22 Jun 2018 • Christian Wachinger, Matthew Toews, Georg Langs, William Wells, Polina Golland
We introduce an approach for image segmentation based on sparse correspondences between keypoints in testing and training images.
no code implementations • 14 Mar 2018 • Jie Luo, Alireza Sedghi, Karteek Popuri, Dana Cobzas, Miaomiao Zhang, Frank Preiswerk, Matthew Toews, Alexandra Golby, Masashi Sugiyama, William M. Wells III, Sarah Frisken
For probabilistic image registration (PIR), the predominant way to quantify the registration uncertainty is using summary statistics of the distribution of transformation parameters.
no code implementations • 29 Nov 2017 • Ahmad Chaddad, Behnaz Naisiri, Marco Pedersoli, Eric Granger, Christian Desrosiers, Matthew Toews
This paper proposes a principled information theoretic analysis of classification for deep neural network structures, e. g. convolutional neural networks (CNN).