Temporal Imaging & Hidden Geometry
Capturing light transport at picosecond scales and reconstructing structure from indirect illumination — where time becomes a controllable dimension of imaging.
Time as
reconstruction
Conventional imaging integrates photons over time, collapsing dynamic propagation into a single frame. By resolving light transport at picosecond scales, time becomes a controllable dimension of capture rather than an invisible assumption. Imaging shifts from recording appearance to reconstructing events as they unfold in space–time.
Light transport as
measurable structure
Light is typically treated as instantaneous illumination. When propagation is resolved, scattering, reflection, and interreflection emerge as structured signals with temporal order. Transport ceases to be an approximation embedded in shading models — it becomes measurable geometry encoded in delay.
Indirect visibility as
inference
Once the speed of light is observable, indirect illumination becomes computationally interpretable. Geometry and material interactions can be inferred from propagation paths rather than direct line-of-sight capture. Visibility expands from what is seen directly to what can be reconstructed from transient signal structure.
These principles extend beyond imaging — they establish a framework for composing signal, motion, and visibility as controllable dimensions within experience systems.
Femto-Photography
Resolved light propagation at picosecond scales and introduced computational reconstruction of space–time volumes, establishing transient imaging as a measurable capture modality.
Winner of SIGGRAPH 2024 Test of Time award
Imaging the Propagation of Light Through Scenes at Picosecond Resolution
Articulated transient imaging as a systems framework, detailing capture architecture, time-unwarping, and reconstruction methods for physically consistent light transport analysis.
Estimating Motion and Size of Moving Non-Line-of-Sight Objects in Cluttered Environments
Demonstrated inference of hidden geometry and motion from indirect temporal signals, extending imaging beyond line-of-sight constraints through structured light transport analysis.