1 code implementation • 18 Dec 2023 • Jérémy Scanvic, Mike Davies, Patrice Abry, Julián Tachella
These methods critically rely on invariance to translations and/or rotations of the image distribution to learn from incomplete measurement data alone.
2 code implementations • 15 Mar 2023 • Julián Tachella, Laurent Jacques
Here we explore the extreme case of learning from binary observations and provide necessary and sufficient conditions on the number of measurements required for identifying a set of signals from incomplete binary data.
no code implementations • 5 Sep 2022 • Dongdong Chen, Mike Davies, Matthias J. Ehrhardt, Carola-Bibiane Schönlieb, Ferdia Sherry, Julián Tachella
From early image processing to modern computational imaging, successful models and algorithms have relied on a fundamental property of natural signals: symmetry.
1 code implementation • 23 Mar 2022 • Julián Tachella, Dongdong Chen, Mike Davies
In this paper, we present necessary and sufficient sensing conditions for learning the signal model from measurement data alone which only depend on the dimension of the model and the number of operators or properties of the group action that the model is invariant to.
1 code implementation • 2 Mar 2022 • Julián Tachella, Michael P. Sheehan, Mike E. Davies
Single-photon light detection and ranging (lidar) captures depth and intensity information of a 3D scene.
1 code implementation • 28 Jan 2022 • Julián Tachella, Dongdong Chen, Mike Davies
In many real-world inverse problems, only incomplete measurement data are available for training which can pose a problem for learning a reconstruction function.
1 code implementation • CVPR 2022 • Dongdong Chen, Julián Tachella, Mike E. Davies
Deep networks provide state-of-the-art performance in multiple imaging inverse problems ranging from medical imaging to computational photography.
1 code implementation • 14 May 2021 • Michael P. Sheehan, Julián Tachella, Mike E. Davies
The computational load of the proposed detection algorithm depends solely on the size of the sketch, in contrast to previous algorithms that depend at least linearly in the number of collected photons or histogram bins, paving the way for fast, accurate and memory efficient lidar estimation.
1 code implementation • ICCV 2021 • Dongdong Chen, Julián Tachella, Mike E. Davies
In various imaging problems, we only have access to compressed measurements of the underlying signals, hindering most learning-based strategies which usually require pairs of signals and associated measurements for training.
1 code implementation • 17 Feb 2021 • Michael P. Sheehan, Julián Tachella, Mike E. Davies
Single-photon lidar has become a prominent tool for depth imaging in recent years.
no code implementations • CVPR 2021 • Julián Tachella, Junqi Tang, Mike Davies
While the NTK theory accurately predicts the filter associated with networks trained using standard gradient descent, our analysis shows that it falls short to explain the behaviour of networks trained using the popular Adam optimizer.
no code implementations • 17 Feb 2020 • Joshua Rapp, Charles Saunders, Julián Tachella, John Murray-Bruce, Yoann Altmann, Jean-Yves Tourneret, Stephen McLaughlin, Robin M. A. Dawson, Franco N. C. Wong, Vivek K Goyal
Non-line-of-sight (NLOS) imaging is a rapidly growing field seeking to form images of objects outside the field of view, with potential applications in search and rescue, reconnaissance, and even medical imaging.