Publications de Baptiste Alexandre Marie Philippe Claude Nicolet

Improved Gradients for Inverse Rendering

Baptiste Alexandre Marie Philippe Claude Nicolet

Physically based rendering is one of the cornerstones of computer graphics, and has evolved in the last decades into a mature technology, with applications ranging from hyperrealistic movies to product design. The recent efficiency of traditional algorithm ...

EPFL2025

Prism-PET II: Second prototype of the TOF-DOI Prism-PET brain scanner with tapered crystals and inverse rendering reconstruction

Wenzel Alban Jakob, Baptiste Alexandre Marie Philippe Claude Nicolet

Accurate PET quantification of tracer uptake in small brain structures is confounded by low sensitivity and the partial volume effect (PVE) caused by limited spatial resolution. In this study, we present the second prototype of the Prism-PET brain scanner ...

IEEE2024

Inverse Rendering for Tomographic Volumetric Additive Manufacturing

Christophe Moser, Wenzel Alban Jakob, Jorge Andres Madrid Wolff, Baptiste Alexandre Marie Philippe Claude Nicolet, Felix Wechsler

Tomographic Volumetric Additive Manufacturing (TVAM) is an emerging 3D printing technology that can create complex objects in under a minute. The key idea is to project intense light patterns onto a rotating vial of photo-sensitive resin, causing polymeriz ...

2024

Inverse Rendering for PET Image Reconstruction

Wenzel Alban Jakob, Baptiste Alexandre Marie Philippe Claude Nicolet

Differentiable rendering (DR) is an emerging field that facilitates the calculation and propagation of gradients of 3D objects through images. In contrast to deep neural networks (DNNs), which generally lack the understanding of 3D objects that form the im ...

IEEE2024

Recursive Control Variates for Inverse Rendering

Wenzel Alban Jakob, Baptiste Alexandre Marie Philippe Claude Nicolet

We present a method for reducing errors-variance and bias-in physically based differentiable rendering (PBDR). Typical applications of PBDR repeatedly render a scene as part of an optimization loop involving gradient descent. The actual change introduced b ...

2023

Large Steps in Inverse Rendering of Geometry

Wenzel Alban Jakob, Baptiste Alexandre Marie Philippe Claude Nicolet

Inverse reconstruction from images is a central problem in many scientific and engineering disciplines. Recent progress on differentiable rendering has led to methods that can efficiently differentiate the full process of image formation with respect to mi ...

ASSOC COMPUTING MACHINERY2021