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Ethan Chung

Publications and source records attributed to Ethan Chung.

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Does AI Understand Imaging? A Systematic Benchmark of Agentic AI for Computational Imaging Tasks

Vision-language models (VLMs) and agentic AI have shown strong performance on semantic visual tasks, but it remains unclear whether they can handle the physics and inverse problems that underlie computational imaging. We present ImagingBench, a benchmark of 20 computational imaging tasks spanning five categories: ray and wave optics, image signal processing, inverse reconstruction, computational sensing, and calibration. ImagingBench evaluates three complementary settings: Expert, fixed expert-guided inverse reconstruction; Planner, planner-guided inverse reconstruction; and Forward, forward-system simulation for consistency checking. We benchmark leading proprietary and open-source image-centric multimodal systems, including Gemini, GPT, and Qwen, and compare them with representative task-specific non-agentic baselines. Across tasks, agentic models remain consistently weaker than specialized methods, especially on computational sensing problems such as lensless imaging, event-based reconstruction, time-of-flight imaging, and holography. Planner guidance provides only modest and inconsistent gains over the fixed-prompt Expert baseline. Although the models often generate visually plausible outputs, their reference-based fidelity remains poor, revealing a substantial gap between semantic visual competence and physically grounded imaging performance. ImagingBench provides a unified testbed for measuring this gap and tracking progress in agentic AI for computational imaging.

cs.AI

Real-Time 3D Simulation of Heat-Induced Air Turbulence

Heat-induced air turbulence produces complex, depth-dependent image distortions that are challenging to reproduce interactively because thermally driven flow must be coupled with refractive light transport. Existing real-time methods often rely on single-view 2D screen-space warps that break multi-view coherence and do not model a 3D refractive volume. We present a real-time, fully 3D Lagrangian framework that models the full pipeline from thermal transport to density variation to optical refraction. Our system augments compressible Smoothed Particle Hydrodynamics (SPH) with temperature transport, buoyancy, and pressure-driven motion to capture rising plumes and turbulent mixing. We render the resulting continuous refractive-index field via curved ray tracing to model light bending in 3D. To reconcile physical fidelity with interactive performance, we introduce spatially adaptive step-size integration for curved-ray tracing, refining steps near strong refractive-index gradients while relaxing them in smooth regions to preserve temporal stability and high-frequency distortion detail without uniform oversampling. The system runs at interactive rates (about 40 fps in our prototype) and matches depth-dependent, multi-view-consistent distortions observed in real video captures more closely than image-based baselines.

cs.GR