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Inverse Problems News

The latest Inverse Problems coverage curated for game developers.

UltraDiff: Differentiable Ray Tracing in Ultrasound for Shape Optimization

arXiv cs.GR details UltraDiff, a differentiable ray-tracing framework that brings gradient-based optimization to ultrasound shape reconstruction. The method treats echoes as time-of-flight events, then backpropagates through a Monte Carlo forward …

Research arXiv cs.GR · 14 hours, 56 minutes ago
Dirichlet Splatting: Differentiable Rendering for Wave-Based Inverse Problems

arXiv cs.GR details Dirichlet Splatting, a differentiable renderer built for wave-based sensing instead of visible-light scenes. The method swaps Gaussian splats for the exact Dirichlet kernel used by finite-window DFTs, …

Research arXiv cs.GR · 5 days, 14 hours ago
High-fidelity tabletop nanoscopy enabled by non-linear spectral preconditioning

A new ptychography pipeline uses multi-scale non-linear spectral preconditioning to push tabletop nanoscopy past the usual detector dynamic-range bottleneck. The key shift is that strict radiometric linearity is no longer …

Research arXiv cs.GR · 2 months ago
Latent Space Reinforcement Learning for Inverse Material Estimation in Food Fracture Simulation

Researchers trained a goal-conditioned PPO policy to estimate food material parameters from fracture behavior in a single forward pass, then used CMA-ES to refine the result. On orange peeling, the …

Research arXiv cs.GR · 3 months, 3 weeks ago
Local MAP Sampling for Diffusion Models

A new inference method for diffusion models, Local MAP Sampling, aims at the point-estimation side of inverse problems rather than full posterior sampling. The authors report state-of-the-art results across image …

Research arXiv cs.GR · 4 months, 1 week ago
Fast and Reliable Gradients for Deformables Across Frictional Contact Regimes

A new differentiable simulation framework targets one of the hardest problems in graphics and robotics: stable gradients through frictional contact. Built as a fully GPU-accelerated solver, it aims to keep …

Research arXiv cs.GR · 6 months, 2 weeks ago