6 citations · 11 across the 7 of their papers we have counts for
8 papers
Geometry Calibration in Tomography with a Differentiable Ray-Based Model
Youssef Haouchat, Aleix Boquet-Pujadas, Sepand Kashani +2
Geometric misalignments between the nominal and true acquisition parameters in tomography degrade reconstructions. We propose a framework that jointly reconstructs the volume and c…
SplineSplat: 3D Ray Tracing for Higher-Quality Tomography
Youssef Haouchat, Sepand Kashani, Aleix Boquet-Pujadas +2
We propose a method to efficiently compute tomographic projections of a 3D volume represented by a linear combination of shifted B-splines. To do so, we propose a ray-tracing algor…
Generalized Ray Tracing with Basis functions for Tomographic Projections
Youssef Haouchat, Sepand Kashani, Philippe Thévenaz +1
This work aims at the precise and efficient computation of the x-ray projection of an image represented by a linear combination of general shifted basis functions that typically ov…
PolyCLEAN: Atomic Optimization for Super-Resolution Imaging and Uncertainty Estimation in Radio Interferometry
Adrian Jarret, Sepand Kashani, Joan Rué-Queralt +3
Aims: We address two issues for the adoption of convex optimization in radio interferometric imaging. First, a method for a fine resolution setup is proposed which scales naturally…
BIPP: An efficient HPC implementation of the Bluebild algorithm for radio astronomy
Emma Tolley, Simon Frasch, Etienne Orliac +6
The Bluebild algorithm is a new technique for image synthesis in radio astronomy which decomposes the sky into distinct energy levels using functional principal component analysis.…
HVOX: Scalable Interferometric Synthesis and Analysis of Spherical Sky Maps
Sepand Kashani, Joan Rué Queralt, Adrian Jarret +1
Analysis and synthesis are key steps of the radio-interferometric imaging process, serving as a bridge between visibility and sky domains. They can be expressed as partial Fourier…
LenslessPiCam: A Hardware and Software Platform for Lensless Computational Imaging with a Raspberry Pi
Eric Bezzam, Sepand Kashani, Martin Vetterli +1
Lensless imaging seeks to replace/remove the lens in a conventional imaging system. The earliest cameras were in fact lensless, relying on long exposure times to form images on the…
pyFFS: A Python Library for Fast Fourier Series Computation and Interpolation with GPU Acceleration
Eric Bezzam, Sepand Kashani, Paul Hurley +2
Fourier transforms are an often necessary component in many computational tasks, and can be computed efficiently through the fast Fourier transform (FFT) algorithm. However, many a…