Search Results for author: Sidharth Gupta

Found 9 papers, 7 papers with code

Joint Cryo-ET Alignment and Reconstruction with Neural Deformation Fields

no code implementations26 Nov 2022 Valentin Debarnot, Sidharth Gupta, Konik Kothari, Ivan Dokmanic

We show that our approach enables the recovery of high-frequency details that are destroyed without accounting for deformations.

Cryogenic Electron Tomography

Differentiable Uncalibrated Imaging

1 code implementation18 Nov 2022 Sidharth Gupta, Konik Kothari, Valentin Debarnot, Ivan Dokmanić

We propose a differentiable imaging framework to address uncertainty in measurement coordinates such as sensor locations and projection angles.

Image Reconstruction

Total Least Squares Phase Retrieval

1 code implementation1 Feb 2021 Sidharth Gupta, Ivan Dokmanić

We address the phase retrieval problem with errors in the sensing vectors.

Retrieval

Improving the affordability of robustness training for DNNs

no code implementations11 Feb 2020 Sidharth Gupta, Parijat Dube, Ashish Verma

Projected Gradient Descent (PGD) based adversarial training has become one of the most prominent methods for building robust deep neural network models.

Computational Efficiency

Fast Optical System Identification by Numerical Interferometry

1 code implementation4 Nov 2019 Sidharth Gupta, Rémi Gribonval, Laurent Daudet, Ivan Dokmanić

Our method simplifies the calibration of optical transmission matrices from a quadratic to a linear inverse problem by first recovering the phase of the measurements.

Retrieval

Don't take it lightly: Phasing optical random projections with unknown operators

1 code implementation NeurIPS 2019 Sidharth Gupta, Rémi Gribonval, Laurent Daudet, Ivan Dokmanić

A signal of interest $\mathbf{\xi} \in \mathbb{R}^N$ is mixed by a random scattering medium to compute the projection $\mathbf{y} = \mathbf{A} \mathbf{\xi}$, with $\mathbf{A} \in \mathbb{C}^{M \times N}$ being a realization of a standard complex Gaussian iid random matrix.

Quantization Retrieval

Solving Complex Quadratic Systems with Full-Rank Random Matrices

1 code implementation14 Feb 2019 Shuai Huang, Sidharth Gupta, Ivan Dokmanić

We tackle the problem of recovering a complex signal $\boldsymbol x\in\mathbb{C}^n$ from quadratic measurements of the form $y_i=\boldsymbol x^*\boldsymbol A_i\boldsymbol x$, where $\boldsymbol A_i$ is a full-rank, complex random measurement matrix whose entries are generated from a rotation-invariant sub-Gaussian distribution.

Information Theory Information Theory

Random mesh projectors for inverse problems

1 code implementation ICLR 2019 Sidharth Gupta, Konik Kothari, Maarten V. de Hoop, Ivan Dokmanić

We show that in this case the common approach to directly learn the mapping from the measured data to the reconstruction becomes unstable.

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