Search Results for author: Julián Tachella

Found 12 papers, 9 papers with code

Self-Supervised Learning for Image Super-Resolution and Deblurring

1 code implementation18 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.

Deblurring Image Super-Resolution +1

Learning to Reconstruct Signals From Binary Measurements

2 code implementations15 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.

Self-Supervised Learning

Imaging with Equivariant Deep Learning

no code implementations5 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.

Image Classification Self-Supervised Learning

Sensing Theorems for Unsupervised Learning in Linear Inverse Problems

1 code implementation23 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.

Dictionary Learning Matrix Completion

Sketched RT3D: How to reconstruct billions of photons per second

1 code implementation2 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.

3D Reconstruction

Unsupervised Learning From Incomplete Measurements for Inverse Problems

1 code implementation28 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.

Image Inpainting

Robust Equivariant Imaging: a fully unsupervised framework for learning to image from noisy and partial measurements

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.

Self-Supervised Learning

Surface Detection for Sketched Single Photon Lidar

1 code implementation14 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.

Equivariant Imaging: Learning Beyond the Range Space

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.

Image Inpainting

The Neural Tangent Link Between CNN Denoisers and Non-Local Filters

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.

Image Denoising Image Restoration

Seeing Around Corners with Edge-Resolved Transient Imaging

no code implementations17 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.

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